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select all the colums although some empty/null

 
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i would like to select some columns from different tables, but from within 15 of these , sometimes 7 of them might be empty.
But I would like to set these 'null' values with either empty or null. How can I achieve these?
my select statement at the moment just returns all the rows that satisfy all the criteria.
so I loose some of the data which I must somehow get...
 
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Sounds like you need to do what's known as an "outer join".
Since the SQL syntax for outer join's vary per Database provider, can you post back which DB you are using? (Oracle, DB2, SQL Server etc)
 
Brusk Baran
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it is sybase.
 
Brusk Baran
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Sybase it is: A.c1 *= B.c2
Oracle A.c1 (+)= B.c2
regards...
 
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