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YEAR(2)Limitations and Migrating to
MySQL supports a number of SQL data types in several categories: numeric types, date and time types, and string (character and byte) types. This chapter provides an overview of these data types, a more detailed description of the properties of the types in each category, and a summary of the data type storage requirements. The initial overview is intentionally brief. The more detailed descriptions later in the chapter should be consulted for additional information about particular data types, such as the permissible formats in which you can specify values.
MySQL also supports extensions for handling spatial data. For information about these data types, see Section 12.17, “Spatial Extensions”.
Data type descriptions use these conventions:
M indicates the maximum display width
for integer types. For floating-point and fixed-point types,
M is the total number of digits that
can be stored (the precision). For string types,
M is the maximum length. The maximum
permissible value of
M depends on the
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