select CAST(CAST('2002-09-30' AS datetime) - CAST('2001-12-01' AS datetime) AS int) : CAST « Data Convert Functions « SQL Server / T-SQL Tutorial

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SQL Server / T-SQL Tutorial » Data Convert Functions » CAST

13. 1. 4. select CAST(CAST('2002-09-30' AS datetime) - CAST('2001-12-01' AS datetime) AS int)


2>

3> select CAST(CAST('2002-09-30' AS datetime) - CAST('2001-12-01' AS datetime) AS int)

4> GO



-----------

        303



(1 rows affected)

1>

13. 1. CAST
	13. 1. 1.	The syntax of the CAST function: CAST(expression AS data_type)
	13. 1. 2.	select CAST('2002-09-30 11:35:00' AS smalldatetime) + 1
	13. 1. 3.	select CAST('2002-09-30 11:35:00' AS smalldatetime) - 1 (Minus)
	13. 1. 4.	select CAST(CAST('2002-09-30' AS datetime) - CAST('2001-12-01' AS datetime) AS int)
	13. 1. 5.	Data type conversion can be performed using the CAST() and CONVERT() functions.
	13. 1. 6.	SELECT CAST('123.4' AS Decimal)
	13. 1. 7.	Use cast function in dynamic sql

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