Case Statement!

Hi all,
I am trying to return a true / false value via case statement.
The boolean value returned is determined whether a column contains a null
value.
Can someone help with the following query as it is causing an error...
SELECT
q.ColumnID, q.ColumnText,
CASE a.ColumnID
WHEN IsNull THEN 0
WHEN Not IsNull Then 1
END
FROM
Table1 q
LEFT JOIN
Table2 a
ON
q.ColumnID = a.ColumnID
Cheers,
Adam
SELECT
q.ColumnID, q.ColumnText,
CASE WHEN a.ColumnID IS NULL THEN 0 ELSE 1 END
FROM
Table1 q
LEFT JOIN
Table2 a
ON
q.ColumnID = a.ColumnID|||Try (untested)
SELECT
q.ColumnID, q.ColumnText,
CASE WHEN a.ColumnID IsNull THEN 0
WHEN a.ColumnID Is not Null Then 1
END AS colAlias
FROM
Table1 q
LEFT JOIN
Table2 a
ON
q.ColumnID = a.ColumnID
"Adam J Knight" <adam.jknight@.optusnet.com.au> wrote in message
news:eV8iGrvKGHA.1288@.TK2MSFTNGP09.phx.gbl...
> Hi all,
> I am trying to return a true / false value via case statement.
> The boolean value returned is determined whether a column contains a null
> value.
> Can someone help with the following query as it is causing an error...
> SELECT
> q.ColumnID, q.ColumnText,
> CASE a.ColumnID
> WHEN IsNull THEN 0
> WHEN Not IsNull Then 1
> END
> FROM
> Table1 q
> LEFT JOIN
> Table2 a
> ON
> q.ColumnID = a.ColumnID
> Cheers,
> Adam
>|||SELECT
q.ColumnID, q.ColumnText,
CASE WHEN a.ColumnID
Is Null THEN 0
ELSE 1
END
FROM
Table1 q
LEFT JOIN
Table2 a
ON
q.ColumnID = a.ColumnID
Regards
Roji. P. Thomas
http://toponewithties.blogspot.com
"Adam J Knight" <adam.jknight@.optusnet.com.au> wrote in message
news:eV8iGrvKGHA.1288@.TK2MSFTNGP09.phx.gbl...
> Hi all,
> I am trying to return a true / false value via case statement.
> The boolean value returned is determined whether a column contains a null
> value.
> Can someone help with the following query as it is causing an error...
> SELECT
> q.ColumnID, q.ColumnText,
> CASE a.ColumnID
> WHEN IsNull THEN 0
> WHEN Not IsNull Then 1
> END
> FROM
> Table1 q
> LEFT JOIN
> Table2 a
> ON
> q.ColumnID = a.ColumnID
> Cheers,
> Adam
>|||Try this.
SELECT
q.ColumnID, q.ColumnText,
CASE WHEN a.ColumnID Is Null THEN 0 ELSE 1 END
FROM
Table1 q
LEFT JOIN
Table2 a
ON
q.ColumnID = a.ColumnID|||"Adam J Knight" <adam.jknight@.optusnet.com.au> wrote in
news:eV8iGrvKGHA.1288@.TK2MSFTNGP09.phx.gbl:

> Can someone help with the following query as it is causing an error...
> SELECT
> q.ColumnID, q.ColumnText,
> CASE a.ColumnID
> WHEN IsNull THEN 0
> WHEN Not IsNull Then 1
> END
> FROM
> Table1 q
> LEFT JOIN
> Table2 a
> ON
> q.ColumnID = a.ColumnID
I suspect that you're misusing the ISNULL function. AFAICT, the syntax
for ISNULL is: ISNULL ( check_expression , replacement_value )
Try something like:
CASE ISNULL(a.ColumnID, 0)
WHEN 0 THEN 0
ELSE 1
END AS aID
or
CASE a.ColumnID
WHEN NULL THEN 0
ELSE 1
END AS aID
HTH,
Geoff Lane
Cornwall, UK|||Hi Adam,
SELECT
q.ColumnID, q.ColumnText,
CASE a.ColumnID
WHEN NULL THEN 0
ELSE 1
END
FROM
Table1 q
LEFT JOIN
Table2 a
ON
q.ColumnID = a.ColumnID
HTH, Jens Suessmeyer.sql