Question

In the diagram below there is a 1:1 relationship between ‘DodgyOldTable’ and ‘MainTable’. Table ‘Option’ contains records with ‘OptionVal1’, ‘OptionVal2’ and ‘OptionVal3’ in the ‘OptionDesc’ field. I need to do an insert into MainTable_Option with a select from DodgyOldTable. Something like this:

INSERT MainTable_Option ([MainTableID],[OptionID]) SELECT ID, (CASE WHEN OptionVal1 = 'y' THEN      (SELECT OptionID       FROM Option       WHERE OptionDesc = 'OptionVal1') END FROM DodgyOldTable 

If possible I want to avoid using several different select statements to perform the insert operation.

alt text http://www.freeimagehosting.net/uploads/863f10bf5f.jpg

Answer 1

INSERT    MainTable_Option    (   MainTableID,    OptionID   ) SELECT   d.ID,    o.OptionId FROM   DodgyOldTable d   INNER JOIN Option o ON     (d.OptionVal1 = 'Y' AND o.OptionDesc = 'OptionVal1') OR     (d.OptionVal2 = 'Y' AND o.OptionDesc = 'OptionVal2') OR     (d.OptionVal3 = 'Y' AND o.OptionDesc = 'OptionVal3')