How to use case statement when colunm is null

Question

1.00/5 (1 vote)

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Declare @Flag Varchar(50)=null

SELECT [uniquiID],
CountryFlag,
EventImage
,CONVERT(varchar(50), [StartDate],106) as StartDate
,CONVERT(varchar(50), [EndDate],106) as EndDate
,[EventName],[Description],[CountryCode],URL,
-- Case When N.Flag=1 then N.Remark when N.Flag=0 then N.Remark End as ''Remarks''
Remark,
Case when N.Flag=1 then 'Approved' when N.Flag=0 then 'Disapproved' when N.Flag= '' then 'Pending' else 'Forward' END as Status,

Flag

FROM TradefairData N
where 1=1

What I have tried:

above is my code when i Execute then Null Value not get and not showing Pending where Get Null Value so Please Help Me How to Use

Posted 8-Jun-17 2:28am

Member 12183079

Updated 29-Aug-17 0:34am

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CPallini · Answer 1 · 2017-06-08T02:33:00

Solution 1

You should use IS NULL, shouldn't you? See, for instance sql server - How to check for NULL in a CASE statement with a Scalar Function? - Stack Overflow[^].

Posted 8-Jun-17 2:33am

CPallini

ZurdoDev · Answer 2 · 2017-06-08T02:35:00

Quote:
not showing Pending where Get Null Value

If I understand you correctly, you want your WHERE clause to include cases where N.Flag is also NULL.

This is very easy, you just need to COALESCE it.

SQL

when COALESCE(N.Flag, '') = '' then 'Pending'

This means if N.Flag is either null or blank.

ashokmaurya786 · Answer 3 · 2017-07-28T01:36:00

Solution 3

(CASE WHEN  (CONVERT(VARCHAR,columnname) is null or CONVERT(VARCHAR,columnname) = 0 ) THEN ''

Posted 28-Jul-17 1:36am

ashokmaurya786

Updated 28-Jul-17 1:37am

v2

Comments

CHill60 29-Aug-17 12:13pm

Use ISNULL or COALESCE

Moin 10918476 · Answer 4 · 2017-08-29T00:34:00

Solution 4

when isnull(N.Flag, '') = '' then 'Pending'

Posted 29-Aug-17 0:34am

Moin 10918476