ISNULL, COALESCE works with both INT and VARCHAR column

There was a question saying ISNULL won't work for VARCHAR columns. I thought I would provide a very basic sample where ISNULL works with string column as well.

--Sample table with a INT and a VARCHAR column

Create table tbltest

(

intSno int,

strName Varchar(10)

)

--Key-in NULL for both columns

Insert into TblTest Values (null, null)

Sample queries:

Select isnull(intSno, 0), isnull(strName, 0) from tblTest

SELECT COALESCE(intSno, 0), COALESCE(strName, 0) from tblTest

--ISNULL on a varchar column replacing with a non numeric value

SELECT ISNULL(strName, '/0') FROM tblTest

--Coalesce on a varchar column

SELECT COALESCE(strName, '/0') FROM tblTest

Comments

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