Question

T-SQL how to use IF ELSE

Asked by: sqlnoob

Dear Experts,

How to you make the following store procedure work?

Also whats a good book to buy for t-sql I don't know much tsql syntax. Thanks :)

Basically, I don't know how to use IF and ELSE correctly in SP and also how do you convert the "answer" from unixtimestamp into this format: yy/mm/dd


THANK YOU :)

CREATE PROCEDURE [dbo].[spTest1] 
 
AS
BEGIN
 
	SET NOCOUNT ON;
 
SELECT red,  
    
IF red IS NOT NULL AND red != '' AND red != 'ReD' THEN 
blue AS answer,  -- need to convert this from unixtimestamp into yy/mm/dd
ELSE 
yellow AS answer,
END
 
pink
 
FROM colors
 
END

                                  
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Asked On
2009-04-16 at 00:28:40ID24327010
Topic

MS SQL Server

Participating Experts
2
Points
500
Comments
10

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Answers

 

by: RiteshShahPosted on 2009-04-16 at 00:47:01ID: 24155255

 

by: RiteshShahPosted on 2009-04-16 at 00:51:03ID: 24155274

you can do something like


CREATE PROCEDURE [dbo].[spTest1] 
 
AS
BEGIN
 
        SET NOCOUNT ON;
 
SELECT red,CASE 
WHEN red IS NOT NULL AND RED <>'' AND RED != 'ReD' 
THEN blue  
else yellow
END AS answer,
pink
from colors    
 
END

                                              
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by: RiteshShahPosted on 2009-04-16 at 00:58:17ID: 24155311

I created one sample table for named color and checked above SP which is working fine. have a look.


create table colors
(
red varchar(10),
blue varchar(10),
yellow varchar(10),
pink varchar(10),
)
 
 
insert into colors
select 'r','b','y','b' union all
select NULL,'b','y','b' union all
select '','b','y','b' union all
select 'ReD','b','y','b' 
 
CREATE PROCEDURE [dbo].[spTest1] 
AS
BEGIN
SET NOCOUNT ON;
 
SELECT red,CASE 
WHEN red IS NOT NULL AND RED <>'' AND RED != 'ReD' 
THEN blue  
else yellow
END AS answer,
pink
from colors    
END
 
 
exec spTest1

                                              
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by: vinurajrPosted on 2009-04-16 at 03:18:27ID: 24156048

Please try this...

declare @Colors Table(sno int identity,colorV varchar(max),colorI varchar(max),colorB varchar(max),colorG varchar(max))
 
insert into @Colors
select 'VIOLET','INDIGO','BLUE','GREEN' 
union all
select NULL,'INDIGO','BLUE','' 
union all
select '',NULL,'BLUE','GREEN' 
union all
select 'VIOLET','','BLUE',NULL
 
SELECT * FROM @Colors
 
SELECT sno,colorV,  
case when colorV IS NOT NULL AND colorV != '' AND colorV != 'VIOLET' THEN colorI ELSE colorB end AS answer,colorG
 
FROM @colors
 
                                              
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by: RiteshShahPosted on 2009-04-16 at 03:28:18ID: 24156094

WHile providing the solution to you, I forgot your another question. There are many good books for SQL Server
"SQL Server 2005 Bible." and "SQL Server black book" to name a few.

BTW, I was googling something and found below given link which will help you to download books.

http://knigaonline.net//BooksCatalog.aspx?category=Data%20Bases

 

by: RiteshShahPosted on 2009-04-16 at 03:28:54ID: 24156097

 

by: RiteshShahPosted on 2009-04-16 at 03:41:55ID: 24156169

hi vinurajr,

have you given anything different than I have explained?

 

by: sqlnoobPosted on 2009-04-16 at 16:30:34ID: 24163796

hi,

thanks for that. how do you convert the "answer" from a unixtimestamp into a dd/mm/yy format?

thank you :)

 

by: sqlnoobPosted on 2009-04-16 at 16:43:58ID: 24163867

hi,

added:

(SELECT DATEADD(second, CAST blue AS int), '19700101'))

how do i convert the above into mm/dd/yy format?

thanks

 

by: RiteshShahPosted on 2009-04-16 at 19:24:35ID: 24164491

here you are.

declare @unixdate varchar(10)
set @unixdate='19700101'
select convert(datetime, substring(@unixdate,5,2) + '/'+right(@unixdate,2) +'/'+ left(@unixdate,4) )

20120131-EE-VQP-002

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