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How to insert / update data into database in sqlserver

Posted on 2011-03-04
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Last Modified: 2013-03-21
I have a table which contains data already.
Now i need to create some script which insert some data into the table
But befire insert the script, i have to validate the data is exist in the table  or not.
If not exist  thst script will insert otherwise  it will update
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Question by:Manikannan
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pdd1lan earned 500 total points
ID: 35034807
here is simple example.

IF EXISTS (SELECT 1 FROM table1)
   UPDATE table1 set field1 = 'tosomething'
ELSE
   INSERT INTO table1 (field1) VALUES ('tosomething')
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Author Comment

by:Manikannan
ID: 35034909
Ya, thanks  pdd1lan.

I used the following query.

If exists(select * from Translations where TNR_LANGUAGE = @TNR_LANGUAGE AND C_LABELNAME = @C_LABELNAME)
Begin
      update Translations set C_TRANSLATEDSTRINGS = @C_TRANSLATEDSTRINGS where TNR_LANGUAGE = @TNR_LANGUAGE AND C_LABELNAME = @C_LABELNAME
End

Else
Begin

insert into Translations (TNR_LANGUAGE,C_LABELNAME,C_TRANSLATEDSTRINGS)values (@TNR_LANGUAGE,@C_LABELNAME,@C_TRANSLATEDSTRINGS)

End
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Expert Comment

by:pdd1lan
ID: 35035070
does your query work?

here are some suggestion:

-not hurt to have try... catch to capture any error might occur around your if statement.  

-the way you do is fine, but might consider not to use "select *"  when you just check for exist record, I suggest using "Select 1" instead.

If exists(select 1 from Translations where TNR_LANGUAGE = @TNR_LANGUAGE AND C_LABELNAME = @C_LABELNAME)

here is an article, might have better explanation why:

http://blog.sqlauthority.com/2008/02/26/sql-server-select-1-vs-select-an-interesting-observation/
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Author Comment

by:Manikannan
ID: 35035971
pdd1lan,

Its working .

Thanks for ur kind of informations.
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Expert Comment

by:pdd1lan
ID: 35036600
glad to hear
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Expert Comment

by:pdd1lan
ID: 35040153
can you give points ?
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Expert Comment

by:pdd1lan
ID: 35097710
??
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