sqlserver if statement

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SQL

alter proc UDSP_GetContractNo
(
@Contractno nvarchar(50)
)
as

if( select id from tbl_ContractNo where Contractno=@Contractno )
else(insert into tbl_ContractNo(Contractno) values (@Contractno))

Hi this is my code. when i am executing it gives error.

Msg 4145, Level 15, State 1, Procedure UDSP_GetContractNo, Line 8
An expression of non-boolean type specified in a context where a condition is expected, near 'else'.
Msg 102, Level 15, State 1, Procedure UDSP_GetContractNo, Line 8
Incorrect syntax near ')'.

Posted 23-Apr-12 21:35pm

ARK Kambhampati

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OriginalGriff · Accepted Answer · 2012-04-23T21:46:00

if expects a boolean condition - you are returning data.
I assume that you meant that if the item exists, return it, otherwise create it?
If so, then try something like:

SQL

IF (NOT EXISTS(SELECT id FROM tbl_ContractNo WHERE Contractno=@Contractno))
   INSERT INTO tbl_ContractNo (ContractNo ) VALUES (@ContractNo)

SELECT id FROM tbl_ContractNo WHERE Contractno=@Contractno

Arav Pradeep Gupta · Accepted Answer · 2012-04-23T21:45:00

Solution 1

Use------------

SQL

IF NOT EXISTS( select id from tbl_ContractNo where Contractno=@Contractno)
BEGIN
insert into tbl_ContractNo(Contractno) values (@Contractno)
END

Posted 23-Apr-12 21:45pm

Arav Pradeep Gupta

Updated 23-Apr-12 21:49pm

v2