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SQL Reference

Quick Reference

The MySQL CAST() function converts a value of any type into the specified datatype.

				
					SELECT CAST('2023-04-15' AS DATE);

Output

				
					CAST('2023-04-15' AS DATE)
2023-04-15

Syntax

				
					CAST(value AS datatype)

Parameters

ParameterDescription
valueThe value to convert (required)
datatypeThe datatype to convert to (required)

  • DATE -> Converts value to a DATE format: "YYYY-MM-DD"

  • DATETIME -> Converts value to a DATETIME format: "YYYY-MM-DD HH:MM:SS"

  • DECIMAL -> Converts value to a DECIMAL; se 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 a TIME format: "HH:MM:SS"

  • CHAR -> Converts value to a CHAR (a fixed length string)

  • NCHAR -> Converts value to a 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 a BINARY string

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SQL NOTES:

  • Any work being done to modify the structure of a database or delete tables or the the database itself should only be done after making a recent backup

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