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The text into a SQL statement execution

Time:01-18

Want to write a stored procedure
Roughly as follows:

The create PROC _proc_ actual value calculation
@ A DECIMAL (18, 2),
@ B a DECIMAL (18, 2),
@ C a DECIMAL (18, 2),
@ D a DECIMAL (18, 2),
@ E DECIMAL (18, 2),
@ formula NVARCHAR (50)
AS
The BEGIN
//according to the formula of the incoming text content and value, and the results of


END

GO

//the first may
EXEC dbo. _proc_ actual value calculation @ A=1,
@ B=50000,
@ C=NULL,
@ D=NULL,
@ E=NULL,
@ formula='@/@ B * 80000'
//the second may
Exec dbo. _proc_ actual value calculation @ A=1,
@ B=null,
@ C=NULL,
@ D=NULL,
@ E=NULL,
@ formula='CASE when @ A>=1 THEN 0 ELSE NULL END '

Also which help me inform the trouble.

CodePudding user response:

 
CREATE PROCEDURE FORMULA
(@ A DECIMAL (18, 2),
@ B a DECIMAL (18, 2),
@ C a DECIMAL (18, 2),
@ D a DECIMAL (18, 2),
@ E DECIMAL (18, 2),
@formula NVARCHAR (50))

AS

The BEGIN

DECLARE @ FORMULA_NEW NVARCHAR (100)

SET @ FORMULA_NEW='SELECT' + @formula + 'AS the RESULT of'

IF the @ IS NOT NULL AND @ B IS NOT NULL

The BEGIN

The EXEC SP_EXECUTESQL @ FORMULA_NEW, N '@ A DECIMAL (12, 13), @ B A DECIMAL (12, 13)', A, @ A=@ @ B=@ B

END

IF the @ IS NOT NULL AND @ B IS NULL

The BEGIN

The EXEC SP_EXECUTESQL @ FORMULA_NEW, N '@ A DECIMAL (12, 13)', @ A=@ A

END

END
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