empty string assigned to int - SQL Server Forums

Please start any new threads on our new site at https://forums.sqlteam.com. We've got lots of great SQL Server experts to answer whatever question you can come up with.

All Forums

SQL Server 2000 Forums

Transact-SQL (2000)

empty string assigned to int

Author

Topic

zekekez
Starting Member

1 Post

Posted - 2004-08-26 : 18:35:55

if an empty string, '', is assigned to a variable of type int, comparison of the variable to '' or 0 is true.

query:
declare @x int
set @x = ''
if @x = '' print 'empty'
if @x = 0 print 0

result:
empty
0

I haven't come across this before. Is this normal?

Zeke

tkizer
Almighty SQL Goddess

38200 Posts

Posted - 2004-08-26 : 18:40:30

declare @x int
set @x = ''
print @x

Assigning @x to '' is actually setting it to 0. See above code. If you don't want it to be set to anything, set it to NULL.

Tara

Subscribe to SQLTeam.com

SQLTeam.com Articles via RSS

SQLTeam.com Weblog via RSS

- Advertisement -

Resources