Documentation Home
MySQL 5.5 Reference Manual
Related Documentation Download this Manual
PDF (US Ltr) - 27.1Mb
PDF (A4) - 27.2Mb
PDF (RPM) - 25.7Mb
HTML Download (TGZ) - 6.5Mb
HTML Download (Zip) - 6.6Mb
HTML Download (RPM) - 5.6Mb
Man Pages (TGZ) - 158.5Kb
Man Pages (Zip) - 262.1Kb
Info (Gzip) - 2.6Mb
Info (Zip) - 2.6Mb
Excerpts from this Manual

MySQL 5.5 Reference Manual  /  Data Types  /  Numeric Types

11.2 Numeric Types

MySQL supports all standard SQL numeric data types. These types include the exact numeric data types (INTEGER, SMALLINT, DECIMAL, and NUMERIC), as well as the approximate numeric data types (FLOAT, REAL, and DOUBLE PRECISION). The keyword INT is a synonym for INTEGER, and the keywords DEC and FIXED are synonyms for DECIMAL. MySQL treats DOUBLE as a synonym for DOUBLE PRECISION (a nonstandard extension). MySQL also treats REAL as a synonym for DOUBLE PRECISION (a nonstandard variation), unless the REAL_AS_FLOAT SQL mode is enabled.

The BIT data type stores bit values and is supported for MyISAM, MEMORY, InnoDB, and NDBCLUSTER tables.

For information about how MySQL handles assignment of out-of-range values to columns and overflow during expression evaluation, see Section 11.2.6, “Out-of-Range and Overflow Handling”.

For information about numeric type storage requirements, see Section 11.7, “Data Type Storage Requirements”.

The data type used for the result of a calculation on numeric operands depends on the types of the operands and the operations performed on them. For more information, see Section 12.6.1, “Arithmetic Operators”.


User Comments
User comments in this section are, as the name implies, provided by MySQL users. The MySQL documentation team is not responsible for, nor do they endorse, any of the information provided here.
  Posted by Waheed Alshahnan on November 23, 2012
There is a know problem when using tinyint(1) and UNION look at bug: #61131
Sign Up Login You must be logged in to post a comment.