IF Statement to control SELECT Statement

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IF Statement to control SELECT Statement

Author

Topic

rikard
Starting Member

2 Posts

Posted - 2009-02-06 : 08:12:39

Hi,

I am not that familiar with SQL.
I need to write a query that will select different columns form different tables, based on the outcome of an IF statement.

Something like:

IF(Table1.TargetType = 'some_value')
SELECT Table1.Date, Table2.Item
FROM Table1 INNER JOIN Table2 ON Table1.DocKey = Table2.DocKey

ELSE
SELECT Table3.Date, Table4.Item
FROM Table1 INNER JOIN Table3 ON Table1.TargetKey = Table3.DocKey
INNER JOIN Table4 ON Table3.DocKey = Table4.DocKey

ODRER BY Date;

How can I achieve this?

visakh16
Very Important crosS Applying yaK Herder

52326 Posts

Posted - 2009-02-06 : 08:46:34

did you mean this?


SELECT Table1.Date, Table2.Item,t.Date, t.Item
FROM Table1 
LEFT JOIN Table2 
ON Table1.DocKey = Table2.DocKey
AND Table1.TargetType = 'some_value'
LEFT JOIN 
(SELECT Table3.Date, Table4.Item, Table3.DocKey
FROM Table3 
INNER JOIN Table4 ON Table3.DocKey = Table4.DocKey
)t
ON Table1.TargetKey = t.DocKey
AND Table1.TargetType <> 'some_value'

rikard
Starting Member

2 Posts

Posted - 2009-02-10 : 08:15:03

Thanx for your reply.

What I needed was to list sales orders and invoices in the same query.
I found an alternative solution - I used a WHERE clause to copy the sales orders and invoices i needed to a temp table, then I used a standard SELECT statement to retrieve the data.

Thanx anyway.

visakh16
Very Important crosS Applying yaK Herder

52326 Posts

Posted - 2009-02-10 : 09:19:30

ok...cool

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