MySQL CAST() Function
❮ MySQL Functions
Example
Convert a value to a DATE datatype:
SELECT
CAST("2017年08月29日" AS DATE);
Try it Yourself »
Definition and Usage
The CAST() function converts a value (of any type) into the specified datatype.
Tip: See also the CONVERT()
function.
Syntax
CAST(value AS datatype)
Parameter Values
| Parameter |
Description |
| value |
Required. The value to convert |
| datatype |
Required. The datatype to convert to. Can be one of the following:
| Value |
Description |
| DATE |
Converts value to DATE. Format: "YYYY-MM-DD" |
| DATETIME |
Converts value to DATETIME. Format: "YYYY-MM-DD HH:MM:SS" |
| DECIMAL |
Converts value to DECIMAL. Use the optional M and D parameters
to specify the maximum number of digits (M) and the number of digits
following the decimal point (D). |
| TIME |
Converts value to TIME. Format: "HH:MM:SS" |
| CHAR |
Converts value to CHAR (a fixed length string) |
| NCHAR |
Converts value to NCHAR (like CHAR, but produces a string with
the national character set) |
| SIGNED |
Converts value to SIGNED (a signed 64-bit integer) |
| UNSIGNED |
Converts value to UNSIGNED (an unsigned 64-bit integer) |
| BINARY |
Converts value to BINARY (a binary string) |
|
Technical Details
More Examples
Example
Convert a value to a CHAR datatype:
SELECT CAST(150 AS CHAR);
Try it Yourself »
Example
Convert a value to a TIME datatype:
SELECT CAST("14:06:10" AS TIME);
Try it Yourself »
Example
Convert a value to a SIGNED datatype:
SELECT CAST(5-10 AS SIGNED);
Try it Yourself »
❮ MySQL Functions
Track your progress - it's free!