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Question : null fields
I have a form where people can enter as much info as they wish and then thats inserted into the db. I need to retrieve their last entry. Theres 5 columns and people can complete as few as they wish. How do I write the code to retrieve column 5 but if its null then retrieve column 4. If its null I need column 3. If 3 is null then it would retrieve 2, etc. Thank you so much. This site has helped me tremendously. Thanks to everyone who is helping and has helped.
Answer : null fields
Use COALESCE in your SQL:
SELECT COALESCE(column5,column4,c
olumn3,col
umn2,colum
n1,0) FROM mytable;
COALESCE returns the first value listed that is non-null. Sounds perfect for your situation.
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