Example
SELECT
CAST("2017-08-29" AS DATE);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) |
| 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) |
| 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
| Works in: | From MySQL 4.0 |
|---|