check constraint on computed column

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SQL-Server-2008

Hi all

I created this table

SQL

a | b | c | total | evaluation 1 | 2 | 3 | 6 | 5 | 2 | 8 | 15 |

--------------> " Total" is computed column is result for sum (a+b+c)

I want to check constraint on Total column
if total = 12 set evaluation ='Perfect'
else set evaluation = 'weak'

Posted 28-Sep-13 22:58pm

shms_rony

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shms_rony 29-Sep-13 6:44am

please help me

Azee 29-Sep-13 9:21am

Please post your stored procedure where you want to apply the above statements.

shms_rony 29-Sep-13 9:39am

ALTER PROCEDURE dbo.ManageLaborEval
(

@a int,
@b int,
@c int

)

AS

INSERT INTO Table1(a, b, c) VALUES (@a,@b,@c)

RETURN

shms_rony 29-Sep-13 9:40am

total column is computed column

Formula --> (([a]+[b])+[c]))

2 solutions

Solution 2

This solution will work whether one or multiple rows are updated or inserted in a transaction. It is a trigger that will run automaticaly whenever one or more rows are inserted or one or more rows are updated.

USE [YourDatabaseName]
GO
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE TRIGGER [dbo].CheckTheTotal]
ON [dbo].[YourTableName]
AFTER INSERT, UPDATE
AS
BEGIN
UPDATE YourTableName SET Evaluation = CASE WHEN total=12 THEN 'Perfect' ELSE 'Weak' END WHERE YourTableName.YourPrimaryKeyName IN (SELECT YourPrimaryKeyName FROM INSERTED);
END

Posted 29-Sep-13 3:55am

Mike Meinz

Updated 29-Sep-13 6:40am

v4

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**Azee** · Accepted Answer · 2013-09-29T03:46:00

Try this:

SQL

ALTER PROCEDURE dbo.ManageLaborEval
	(
@a int,
@b int,
@c int
)

AS
BEGIN

	Declare @sum bigint;
	Set @sum = @a + @b + @c;

	Declare @Evaluation NVARCHAR(30);
	IF @sum = 12
	BEGIN
		Set @Evaluation = 'Perfect';
	END
	ELSE
	BEGIN
		Set @Evaluation = 'weak';
	END
		
	INSERT INTO Table1(a, b, c, total, evaluation) VALUES (@a,@b,@c, @sum, @Evaluation)

END

Hope it helps,

Azee...