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what is the difference between '' and ' ' [message #18593]

Thu, 07 February 2002 01:15

ksr
Messages: 112
Registered: January 2002

Senior Member

Hi,
What is the differnce between ''(quotes without space between them)

and

' ' (quotes with spaces between them.

I have issued the query like
select * from tab1 where col1 <> '' --does not return values

select * from tab1 where col1 <> ' ' --returns values

Any explanation on this

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Re: what is the difference between '' and ' ' [message #18597 is a reply to message #18593]

Thu, 07 February 2002 03:48

Suresh Vemulapalli
Messages: 624
Registered: August 2000

Senior Member

'' equal to null or empty
but u have to query like this:

select * from tab1 where col1 is not null

2) space is also character. i think data stored in this column is single space not null.

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