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MySQL Data Types - TEXT
Versions: MySQL 5.x, 4.x and 3.23
| MySQL - TEXT | |
|---|---|
| Syntax | TEXT[(n)] [CHARACTER SET charset | BINARY ] [COLLATE collate] |
| Data | Variable-length character data, single-byte and multibyte character sets |
| Parameters | n is the maximum number of characters, optional. CHARACTER SET specifies the character set, COLLATE specifies a collation for the character set. BINARY is equal to specifying the binary collation |
| Range | 65535 bytes or n if n is specified |
| Trailing Spaces | Not removed when the value is stored and retrieved. But trailing spaces are insignificant in comparisons, primary and unique keys |
| Error Handling | Exceeding data truncated and a warning is generated if strict SQL mode is not enabled, otherwise in case of non-space characters truncation, an error is raised |
| Storage Size | Actual entry length |
| Internals | If n is specified, TEXT is converted to the smallest data type large enough to hold n characters. TEXT(<255) is converted to TINYTEXT, TEXT(<16M) is converted to MEDIUMTEXT and TEXT(>16M) is converted to LONGTEXT |
| Version Differences | MySQL 4.1 and later - CHARACTER SET and COLLATE options are available |
| Standards | MySQL Extension |
MySQL TEXT - Equivalents in Other Databases
| Database | Data Type and Conversion |
|---|---|
| Oracle | CLOB, 4G; NCLOB, 4G, Unicode - UTF-8 or UTF-16 |
| SQL Server | VARCHAR(n | max), 1 ⇐ n ⇐ 8000, 2G if max is specified |
| PostgreSQL | VARCHAR(n), 1 ⇐ n ⇐ 1G |
| Sybase ASE | TEXT, 2G |
| Informix | VARCHAR(n,r), 1 ⇐ n ⇐ 255, LVARCHAR(n), 1 ⇐ n ⇐ 32739 |
| HP Neoview | VARCHAR(n), 1 ⇐ n ⇐ (32708 - size of other columns) |
Related Data Types in MySQL
| Data Types | |||||
|---|---|---|---|---|---|
| Fixed-length character data | CHAR(n) | NCHAR(n) | |||
| Variable-length character data | VARCHAR(n) | NVARCHAR(n) | TINYTEXT | MEDIUMTEXT | |
| Character large objects | LONGTEXT | ||||
All Data Types