SQL Reference
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Quick Reference

The SQL Server CAST() function converts a value of any type into a specified datatype.

SELECT CAST(109.45 AS int);

Output

109

Syntax

CAST(expression AS datatype(length))

Parameters

ParameterDescription
expressionThe value to convert (required)
datatypeThe datatype to convert expression to (required)

  • bigint

  • int

  • smallint

  • tinyint

  • bit

  • decimal

  • numeric

  • money

  • smallmoney

  • float

  • real

  • datetime

  • smalldatetime

  • char

  • varchar

  • text

  • nchar

  • nvarchar

  • ntext

  • binary

  • varbinary

  • image
(length)The length of the resulting data type (for char, varchar, nchar, nvarchar, binary and varbinary)

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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