What is binary brokers data type in sql

SQL Data Types for MySQL, SQL Server, and MS Access. A data type defines what kind of value a column can hold: integer data, character data, monetary data, date and time data, binary strings, and so on. Each column in a database table is required to have a name and a data type. An SQL developer must decide what type of data that will be stored inside each column when creating a table. The data type is a guideline for SQL to understand what type of data is expected inside of each column, and it also identifies how SQL will interact with the stored data. Note: Data types might have different names in different database. And even if the name is the same, the size and other details may be different! Always check the documentation! In MySQL there are three main data types: text, number, and date. Note: The values are sorted in the order you enter them. You enter the possible values in this format: ENUM('X','Y','Z') *The integer types have an extra option called UNSIGNED. Normally, the integer goes from an negative to positive value. Adding the UNSIGNED attribute will move that range up so it starts at zero instead of a negative number. Note: The supported range is from '1000-01-01' to '9999-12-31' Note: The supported range is from '1000-01-01 00:00:00' to '9999-12-31 23:59:59' Note: The supported range is from '1970-01-01 00:00:01' UTC to '2038-01-09 03:14:07' UTC.

Note: The supported range is from '-838:59:59' to '838:59:59' Note: Values allowed in four-digit format: 1901 to 2155. Values allowed in two-digit format: 70 to 69, representing years from 1970 to 2069. *Even if DATETIME and TIMESTAMP return the same format, they work very differently. In an INSERT or UPDATE query, the TIMESTAMP automatically set itself to the current date and time. TIMESTAMP also accepts various formats, like YYYYMMDDHHMISS, YYMMDDHHMISS, YYYYMMDD, or YYMMDD. SQL Server Data Types. Number data types: Allows numbers from -10^38 +1 to 10^38 Ђ“1. The p parameter indicates the maximum total number of digits that can be stored (both to the left and to the right of the decimal point). p must be a value from 1 to 38. Default is 18. The s parameter indicates the maximum number of digits stored to the right of the decimal point. s must be a value from 0 to p. Default value is 0. Allows numbers from -10^38 +1 to 10^38 Ђ“1. The p parameter indicates the maximum total number of digits that can be stored (both to the left and to the right of the decimal point). p must be a value from 1 to 38. Default is 18. The s parameter indicates the maximum number of digits stored to the right of the decimal point.

s must be a value from 0 to p. Default value is 0. The n parameter indicates whether the field should hold 4 or 8 bytes. float(24) holds a 4-byte field and float(53) holds an 8-byte field. Default value of n is 53. Other data types: Microsoft Access Data Types. HOW TO. CERTIFICATES. HTML, CSS, JavaScript, PHP, jQuery, Bootstrap and XML. Binary Data Types in SQL Server. Microsoft SQL Server supports seven distinct categories of data. Of these, binary strings allow for encoded data represented as binary objects. bit variables store a single bit with a value of 0, 1 or NULL. binary(n) variables store n bytes of fixed-size binary data. These fields may store a maximum of 8,000 bytes. varbinary(n) variables store variable-length binary data of approximately n bytes. They may store a maximum of 8,000 bytes.

varbinary(max) variables store variable-length binary data of approximately n bytes. They may store a maximum of 2 GB and actually store the length of the data plus an additional two bytes. image variables store up to 2 GB of data and are commonly used to store any type of data file (not just images). The image type is scheduled for deprecation in a future release of SQL Server. Microsoft engineers recommend using varbinary(max) instead of image types for future development. Use bit columns when you need to store yes-or-no kinds of data as represented by zeroes and ones. Use binary columns when the size of the columns are relatively uniform. Use varbinary columns when the column size is expected to exceed 8K or may be subject to significant variability in size per record. T-SQL—the variant of SQL used in Microsoft SQL Server—right-pads data when you convert from any string type to a binary or varbinary type. Any other type conversion to a binary type yields a left-pad. This padding is effected through the use of hexadecimal zeroes. Because of this conversion and the risk of truncation if the post-conversion field isn't large enough, it's possible that converted fields could result in arithmetic errors without throwing an error message. binary and varbinary (Transact-SQL) Binary data types of either fixed length or variable length.

binary ( n ) Fixed-length binary data with a length of n bytes, where n is a value from 1 through 8,000. The storage size is n bytes. varbinary ( n | max ) Variable-length binary data. n can be a value from 1 through 8,000. max indicates that the maximum storage size is 2^31-1 bytes. The storage size is the actual length of the data entered + 2 bytes. The data that is entered can be 0 bytes in length. The ANSI SQL synonym for varbinary is binary varying . When n is not specified in a data definition or variable declaration statement, the default length is 1. When n is not specified with the CAST function, the default length is 30. Converting binary and varbinary data. When data is converted from a string data type ( char , varchar , nchar , nvarchar , binary , varbinary , text , ntext , or image ) to a binary or varbinary data type of unequal length, SQL Server pads or truncates the data on the right. When other data types are converted to binary or varbinary , the data is padded or truncated on the left. Padding is achieved by using hexadecimal zeros.

Converting data to the binary and varbinary data types is useful if binary data is the easiest way to move around data. Converting any value of any type to a binary value of large enough size and then back to the type, always results in the same value if both conversions are taking place on the same version of SQL Server. The binary representation of a value might change from version to version of SQL Server. You can convert int , smallint , and tinyint to binary or varbinary , but if you convert the binary value back to an integer value, this value will be different from the original integer value if truncation has occurred. For example, the following SELECT statement shows that the integer value 123456 is usually stored as a binary 0x0001e240 : However, the following SELECT statement shows that if the binary target is too small to hold the entire value, the leading digits are silently truncated so that the same number is stored as 0xe240 : The following batch shows that this silent truncation can affect arithmetic operations without raising an error: The final result is 57921 , not 123457 . Conversions between any data type and the binary data types are not guaranteed to be the same between versions of SQL Server. What is binary brokers data type in sql Get via App Store Read this post in our app! What data can be stored in varbinary data type of SQL Server? I have a table in which the userpassword field have varbinary datatype, So I'm confused that in which form should I save the data into userpassword field because when I save varchar data it gave me error. A varbinary column can store anything. To store a string in it, you'd have to cast it to varbinary : But for a password, a varbinary column usually stores a hash of some kind. For example, a SHA1 hash using the HashBytes function: Storing a one-way hash instead of the real password is more secure.

You can check if the password matches: But there is no way you can retrieve the password by looking at the table. So only the end user knows his password, and not even the DBA can retrieve it. You will need to explicitly cast the VARCHAR. SQL Server error message says. Implicit conversion from data type varchar to varbinary is not allowed. SQL Server requires an explicit conversion from varchar to varbinary, as per the big table on CAST and CONVERT in MSDN. The BINARY and VARBINARY data types. MySQL's support of the BINARY and VARBINARY data type is good, and the BINARY and VARBINARY data types are good things. And now the details. What applies here for MySQL applies for MariaDB as well. Who supports VARBINARY. There's an SQL:2008 standard optional feature T021 "BINARY and VARBINARY data types". Our book has a bigger description, but here is one that is more up to date: Standard Conformance.

Provided that sql_mode=strict_all_tables, MySQL does the right (standard) thing most of the time, with two slight exceptions and one exception that isn't there. The first exception: . This causes an error. MySQL is non-conformant. If one tries to store three bytes into a two-byte target, but the third byte is X'00', there should be no error. The second exception: . This does not cause an error. MySQL is non-conformant. If a concatenation results in a value that's longer than the maximum length of VARBINARY, which is less than 65535, then there should be an error. The exception that isn't there: The MySQL manual makes an odd claim that, for certain cases when there's a UNIQUE index, "For example, if a table contains 'a', an attempt to store 'a\0' causes a duplicate-key error.

" Ignore the manual. Attempting to insert 'a\0' will only cause a duplicate-key error if the table's unique-key column contains 'a\0'. The poem Antigonish desccribed a similar case: Yesterday, upon the stair, I met a man who wasn't there. He wasn't there again today, I wish, I wish he'd go away. " Since BINARY columns are fixed-length, there has to be a padding rule. For example, suppose somebody enters zero bytes into a BINARY(2) target: . The result is '0000' -- the padding byte for BINARY is X'00' (0x00), not X'20' (space). There also has to be a rule about what to do for comparisons if comparands end with padding bytes. . This returns zero rows. It's implementation-defined whether MySQL should. ignore trailing X'00' during comparisons, so there was no chance of getting.

The behaviour difference between BINARY and VARBINARY can cause fun: . which fails on a foreign-key constraint error! It looks bizarre. that a value which is coming from the primary-key row can't be put. in the foreign-key row, doesn't it? But the zero-padding rule, combined. with the no-ignore-zero rule, means this is inevitable. BINARY(x) is a fine data type whenever it's certain that all the values. will be exactly x bytes long, and otherwise it's a troublemaker. When to use VARBINARY. VARBINARY is better than TINYBLOB or MEDIUMBLOB because it has a definite.

maximum size, and that makes life easier for client programs that want to. know: how wide can the display be? In most DBMSs it's more important that BLOBs can be stored separately from the rest of the row. VARBINARY is better than VARCHAR if there should be no validity checking. For example, if the default character set is UTF8 then this is illegal: . but this is legal because character set doesn't matter: (I ran into this example on a SQL Server forum where the participants display woeful ignorance of Unicode). And finally converting everything to VARBINARY is one way to avoid the annoying message "Invalid mix of collations". In fact the wikimedia folks appear to have changed all VARCHARs to VARBINARYs back in 2011 just to avoid that error. I opine that the less drastic solution is to use collations consistently, but I wasn't there. ovais. tariq. opensource tech rumblings. Understanding MySQL binary and non-binary string data types. There are two main categories of string data types available and understanding their characteristics properly will allow you to choose the appropriate string data type for the column in accordance with the requirements of the application. Having reviewed different table structures designed by different people, I have come to the conclusion that binary and non-binary string data types are used without consideration of the consequences of choosing either one. The confusion stems from the fact that both non-binary and binary string data appear to store characters because they can be saved as quoted string.

Broadly speaking there are two major categories within which the different string types can be divided, and understanding these two categories is very important because each of this category is handled differently by MySQL. These two categories are described as follows: Non-binary string data type. Non-binary string is actually a sequence of characters that have a character set and a collation. Now let’s understand both of these terms. The character set as the name suggests determines the set of characters supported by that character set. The character set also determines whether the storage of each character requires a single byte or multiple bytes. Multi-byte characters may need a fixed number of bytes per character or a variable number of bytes per character. ucs2 Unicode character set requires 2 bytes per character, and utf8 Unicode character set requires 1 to 3 bytes per character. Now what is collation? Collation actually determines the sorting order of the characters in the character set associated with the string and is hence used in string comparisons. Collation also determines whether the string can be case-sensitive or case-insensitive. Collation can be binary as well, in which case the characters are sorted based on their numeric byte value, which also means that a string with a binary collation will be case-sensitive.

Note also that character set and collation can be defined at the database level, the table level or the column level. Executing the following, will give you a list of available character sets and their default collations. Note that the collations end in either ci , cs , or bin , these stand for, case-insensitive, case-sensitive, and binary collations respectively. The non-binary string types are. Binary string data type. The most important point to remember in case of binary string data type is that, binary strings don’t have character sets and collations. Binary strings are merely a sequence of byte values, and because of this, such strings seem to be case-sensitive, because uppercase and lowercase characters have different byte values. Also, there is no concept of multi-byte characters, hence, multi-byte characters when stored in binary string columns are treated as separate bytes, and any association between the bytes are lost. The binary string types are. Which category of string data type should you use? Now the big question is which string data type should be chosen? That really depends on the type of value that you would be storing in the column, if you are storing data that you want to represent as text, such as a blog post or product description, then you should choose non-binary string data type.

But if you want to store data that are merely bytes such as data that represents image, then you should use a binary string data type. Also note that, you should choose a multi-byte character set such as utf8 or ucs2 only when you want to store characters that cannot be represented as single-byte characters, otherwise you would be wasting space. A CHAR(10) column would need 30 bytes for each value regardless of the actual value if utf8 character set is used, however, the same column would need 10 bytes for each value if a single-byte character set such as latin1 is used. Keeping these considerations in mind is very important. Can we join two tables on binary type column? i. e. I’ve two tables, both tables have common column having data type as binary. Can we fetch the records using join on the Binary type columns? Yes you can join two tables by binary column. For best performance you should have an index on the column you want to join on. But then again search by string as not as fast as compared to a numeric data type. Can’t you join on some identifier column?

If I have stored the text using binary data type, how can I convert again the binary sequence in text? The data in binary type column are stored as a bit stream with no character set or collation. It doesn’t matter to MySQL what you store in it. If you stored string in the column, when you fetch it, that is what will be returned, you do not need to convert the value back to text. nice! helped me so much, thanks! I have a column with BINARY as the data type. But if I use it in a WHERE clause, it returns an empty table. Why that behaviour? I wanted to use mysql encode function with salt. The reason is to encode the id which is the primary key and send it to the client side… Just to obscure the direct database reference. i used SELECT ENCODE(id, ‘salt’) AS idx FROM Table … In phpmyadmin i could see the actual values but when i use that in php and in the client side in could only see few extended ascii chars… so i thought of using SELECT CONVERT(ENCODE(id, ‘salt’), CHAR(1000) AS idx from table… which gave weird ascii chars(extended chars) … how should i use the encode functions return value which is binary to client side to use it in javascript. What is binary brokers data type in sql This chapter describes all of the SQL data types that PointBase supports.

Data types define what type of data a column can contain. The following sections describe each PointBase data type in detail and discuss converting data types. Tables are provided at the end of the chapter to show the mappings between PointBase data types and industry standard and other common non-standard data types. PointBase supports the following data types for its column and parameter declarations. CHARACTER (length) or CHAR (length) VARCHAR (length) BOOLEAN SMALLINT INTEGER or INT DECIMAL (p,s) or DEC (p,s) NUMERIC (p,s) REAL FLOAT(p) DOUBLE PRECISION DATE TIME TIMESTAMP CLOB (length) or CHARACTER LARGE OBJECT (length) or CHAR LARGE OBJECT (length) BLOB (length) or BINARY LARGE OBJECT (length) CHARACTER (length) or CHAR (length) The CHARACTER data type accepts character strings, including Unicode, of a fixed length. The length of the character string should be specified in the data type declaration for example, CHARACTER(n) where n represents the desired length of the character string. If no length is specified during the declaration, the default length is 1. The minimum length of the CHARACTER data type is 1 and it can have a maximum length up to the table page size. Character strings that are larger than the page size of the table can be stored as a Character Large Object (CLOB). If you assign a value to a CHARACTER column containing fewer characters than the defined length, the remaining space is filled with blanks characters. Any comparisons made to a CHARACTER column must take these trailing spaces into account. Attempting to assign a value containing more characters than the defined length results in the truncation of the character string to the defined length. If any of the truncated characters are not blank, an error is raised.

Character String Examples: CHAR(10) or CHARACTER(10) The VARCHAR data type accepts character strings, including Unicode, of a variable length is up to the maximum length specified in the data type declaration. A VARCHAR declaration must include a positive integer in parentheses to define the maximum allowable character string length. For example, VARCHAR(n) can accept any length of character string up to n characters in length. The length parameter may take any value from 1 to the current table page size. Attempting to assign a value containing more characters than the defined maximum length results in the truncation of the character string to the defined length. If any of the truncated characters are not blank, an error is raised. If you need to store character strings that are longer than the current table page size, the Character Large Object (CLOB) data type should be used. The BOOLEAN data type supports the storage of two values: TRUE or FALSE. No parameters are required when declaring a BOOLEAN data type. Use the case insensitive keywords TRUE or FALSE to assign a value to a BOOLEAN data type. Comparisons using the BOOLEAN data type should also use these keywords.

If you attempt to assign any other value to a BOOLEAN data type, an error is raised. The SMALLINT data type accepts numeric values with an implied scale of zero. It stores any integer value between the range 2^ -15 and 2^15 -1. Attempting to assign values outside this range causes an error. If you assign a numeric value with a precision and scale to a SMALLINT data type, the scale portion truncates, without rounding. The INTEGER data type accepts numeric values with an implied scale of zero. It stores any integer value between the range 2^ -31 and 2^31 -1. Attempting to assign values outside this range causes an error. If you assign a numeric value with a precision and scale to an INTEGER data type, the scale portion truncates, without rounding. DECIMAL (p,s) or DEC (p,s) The DECIMAL data type accepts numeric values, for which you may define a precision and a scale in the data type declaration. The precision is a positive integer that indicates the number of digits that the number will contain. The scale is a positive integer that indicates the number of these digits that will represent decimal places to the right of the decimal point. The scale for a DECIMAL cannot be larger than the precision. DECIMAL data types can be declared in one of three different ways. The declaration of it controls how the number is presented to an SQL query, but not how it is stored.

DECIMAL - Precision defaults to 38, Scale defaults to 0 DECIMAL(p) - Scale defaults to 0 DECIMAL(p, s) - Precision and Scale are defined by the user. In the above examples, p is an integer representing the precision and s is an integer representing the scale. PointBase treats the NUMERIC data type in exactly the same way as the DECIMAL data type. The REAL data type accepts approximate numeric values, up to a precision of 64. No parameters are required when declaring a REAL data type. If you attempt to assign a value with a precision greater than 64 an error is raised. The FLOAT data type accepts approximate numeric values, for which you may define a precision up to a maximum of 64. If no precision is specified during the declaration, the default precision is 64. Attempting to assign a value lager than the declared precision will cause an error to be raised. The REAL data type accepts approximate numeric values, up to a precision of 64. No parameters are required when declaring a DOUBLE PRECISION data type. If you attempt to assign a value with a precision greater than 64 an error is raised. The DATE data type accepts date values. No parameters are required when declaring a DATE data type. Date values should be specified in the form: YYYY-MM-DD. However, PointBase will also accept single digits entries for month and day values. Month values must be between 1 and 12, day values should be between 1 and 31 depending on the month and year values should be between 0 and 9999. Values assigned to the DATE data type should be enclosed in single quotes, preceded by the case insensitive keyword DATE for example, DATE '1999-04-04'. The TIME data type accepts time values. No parameters are required when declaring a TIME data type.

Date values should be specified in the form: HH:MM:SS. An optional fractional value can be used to represent nanoseconds. The minutes and seconds values must be two digits. Hour values should be between zero 0 and 23, minute values should be between 00 and 59 and second values should be between 00 and 61.999999. Values assigned to the TIME data type should be enclosed in single quotes, preceded by the case insensitive keyword TIME for example, TIME '07:30:00'. The TIMESTAMP data type accepts timestamp values, which are a combination of a DATE value and a TIME value. No parameters are required when declaring a TIMESTAMP data type. Timestamp values should be specified in the form: YYYY-MM-DD HH:MM:SS. There is a space separator between the date and time portions of the timestamp. All specifications and restrictions noted for the DATE and TIME data types also apply to the TIMESTAMP data type. Values assigned to the TIMESTAMP data type should be enclosed in single quotes, preceded by the case insensitive keyword TIMESTAMP for example, TIMESTAMP '1999-04-04 07:30:00'. CLOB (length) or CHARACTER LARGE OBJECT (length) or CHAR LARGE OBJECT (length) The Character Large Object (CLOB) data type accepts character strings longer than those that are allowed in the CHARACTER (length) or VARCHAR (length) data types. The CLOB declaration uses the following syntax to specify the length of the CLOB in bytes: In the above syntax, n is an unsigned integer that represents the length. K, M, and G correspond to Kilobytes, Megabytes or Gigabytes, respectively.

If K, M, or G is specified in addition to n, then the actual length of n is the following: The maximum size allowed for CLOB data types is 2 gigabytes. If a length is not specified, then a default length of one byte is used. CLOB values can vary in length from one byte up to the specified length. BLOB (length) or BINARY LARGE OBJECT (length) The Binary Large Object (BLOB) data type accepts binary values. The BLOB declaration uses the following syntax to specify the length in bytes: In the above syntax, n is an unsigned integer that represents the length. K, M, and G correspond to Kilobytes, Megabytes or Gigabytes, respectively. If K, M, or G is specified in addition to n , then the actual length of n is the following: The maximum size allowed for BLOB data types is 2 gigabytes. If a length is not specified, then a default length of one byte is used. BLOB values can vary in length from one byte up to the specified length. Data Conversions and Assignments. The PointBase database allows two types of data conversions - implicit and explicit. An implicit data conversion is automatically performed between data types that are in the same data type family. Table 1 describes the data type families supported by PointBase. Implicit data conversions are performed as needed and are transparent to the user.

PointBase handles explicit data conversion using the SQL Scalar CAST function. This function converts a value from one PointBase data type to another in the same data type family. PointBase also supports other non-SQL standard data types. Table 3 describes the mapping of non-SQL standard data types from other database vendors to PointBase data types. What is binary brokers data type in sql I hope the following information will be helpful. Please click here to get the original doc. The following table lists Microsoft SQL Server data types, their equivalents in the common language runtime (CLR) for SQL Server in the System. Data. SqlTypes namespace, and their native CLR equivalents in the Microsoft. NET Framework. SQL Server data type.

CLR data type (SQL Server) CLR data type ( Framework) SQLChars is a better match for data transfer and access, and SQLString is a better match for performing String operations. Char, String, Char, Nullable<char> The same class that is bound to the user-defined type in the same assembly or a dependent assembly. I hope the following information will be helpful. Please click here to get the original doc. The following table lists Microsoft SQL Server data types, their equivalents in the common language runtime (CLR) for SQL Server in the System. Data. SqlTypes namespace, and their native CLR equivalents in the Microsoft. NET Framework. SQL Server data type. CLR data type (SQL Server) CLR data type ( Framework) SQLChars is a better match for data transfer and access, and SQLString is a better match for performing String operations. Char, String, Char, Nullable<char> The same class that is bound to the user-defined type in the same assembly or a dependent assembly. Proposed as answer by mkamoski2 Thursday, January 26, 2012 9:27 PM. Since we don't have a mapping between varchar and nvarchar, should we use nvarchar if we want to use EF? Also, for smallint should I use Int16?

For every expert, there is an equal and opposite expert. - Becker's Law. Microsoft is conducting an online survey to understand your opinion of the Msdn Web site. If you choose to participate, the online survey will be presented to you when you leave the Msdn Web site. Using Binary Data. The binary and varbinary data types store strings of bits. Although character data is interpreted based on the SQL Server code page, binary and varbinary data is simply a stream of bits. binary data can store a maximum of 8,000 bytes. varbinary , using the max specifier, can store a maximum of 2^31 bytes. For more information about varbinary(max), see Using Large-Value Data Types. Binary constants have a leading 0x (a zero and the lowercase letter x) followed by the hexadecimal representation of the bit pattern. For example, 0x2A specifies the hexadecimal value of 2A, which is equivalent to a decimal value of 42 or a one-byte bit pattern of 00101010. Use binary data when storing hexadecimal values such as a security identification number (SID), a GUID (using the uniqueidentifier data type), or a complex number that can be stored using hexadecimal shorthand. The following Transact-SQL example stores a SID and hexadecimal literal: What is binary brokers data type in sql The BINARY and VARBINARY types are similar to CHAR and VARCHAR , except that they contain binary strings rather than nonbinary strings.

That is, they contain byte strings rather than character strings. This means they have the binary character set and collation, and comparison and sorting are based on the numeric values of the bytes in the values. The permissible maximum length is the same for BINARY and VARBINARY as it is for CHAR and VARCHAR , except that the length for BINARY and VARBINARY is a length in bytes rather than in characters. The BINARY and VARBINARY data types are distinct from the CHAR BINARY and VARCHAR BINARY data types. For the latter types, the BINARY attribute does not cause the column to be treated as a binary string column. Instead, it causes the binary ( _bin ) collation for the column character set to be used, and the column itself contains nonbinary character strings rather than binary byte strings. For example, CHAR(5) BINARY is treated as CHAR(5) CHARACTER SET latin1 COLLATE latin1_bin , assuming that the default character set is latin1 . This differs from BINARY(5) , which stores 5-bytes binary strings that have the binary character set and collation. For information about differences between binary strings and binary collations for nonbinary strings, see Section 10.1.8.5, “The binary Collation Compared to _bin Collations”. If strict SQL mode is not enabled and you assign a value to a BINARY or VARBINARY column that exceeds the column's maximum length, the value is truncated to fit and a warning is generated. For cases of truncation, you can cause an error to occur (rather than a warning) and suppress insertion of the value by using strict SQL mode. See Section 5.1.8, “Server SQL Modes”. When BINARY values are stored, they are right-padded with the pad value to the specified length.

The pad value is 0x00 (the zero byte). Values are right-padded with 0x00 on insert, and no trailing bytes are removed on select. All bytes are significant in comparisons, including ORDER BY and DISTINCT operations. 0x00 bytes and spaces are different in comparisons, with 0x00 < space. Example: For a BINARY(3) column, 'a ' becomes 'a \0' when inserted. 'a\0' becomes 'a\0\0' when inserted. Both inserted values remain unchanged when selected. For VARBINARY , there is no padding on insert and no bytes are stripped on select. All bytes are significant in comparisons, including ORDER BY and DISTINCT operations. 0x00 bytes and spaces are different in comparisons, with 0x00 < space.

For those cases where trailing pad bytes are stripped or comparisons ignore them, if a column has an index that requires unique values, inserting into the column values that differ only in number of trailing pad bytes will result in a duplicate-key error. For example, if a table contains 'a' , an attempt to store 'a\0' causes a duplicate-key error. You should consider the preceding padding and stripping characteristics carefully if you plan to use the BINARY data type for storing binary data and you require that the value retrieved be exactly the same as the value stored. The following example illustrates how 0x00 - padding of BINARY values affects column value comparisons: If the value retrieved must be the same as the value specified for storage with no padding, it might be preferable to use VARBINARY or one of the BLOB data types instead. Thus, the operating system, with its standard character set, defines how characters are converted into binary values. Only there is no MySQL character set definition involved.