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Distinguished Contributor
Posts: 309
Registered: ‎10-02-2003
Message 1 of 2 (274 Views)

ADOLisp - Select rows with null values

274 Views, 1 Replies
01-02-2013 10:19 AM

Hi - I'm attempting to update a database so that all fields in a specified column that have a null value and are of datatype number are allocated a value of 0 (zero), but I'm having trouble selecting the offending rows..

my statement is

"select * from crossings where pipeline_id = null"

and this returns nothing (although I know there are some in there because if i run the following:

"select * from crossings where pipeline_id <> null"

it returns all rows that have a value and omits those that don't (ie the ones that I want)

Anyone know what I'm doing wrong?

Distinguished Contributor
Posts: 309
Registered: ‎10-02-2003
Message 2 of 2 (265 Views)

Re: ADOLisp - Select rows with null values

01-03-2013 02:07 AM in reply to: petervose

Realised I should use keyword "IS" instead of using "="

select * from crossings where pipeline_id IS null

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