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SQL nested SELECT statement for column
Posted on 2010-11-23
I am trying to select a column inside of a SELECT statement that pulls vlaues out where a different column equals a value. This is an example of what I want to do but it is not correct:
SELECT column1, column2, (SELECT column 3 WHERE column6 <= 12 AND column10 >= 1 AS YearlySum), column 3, column4, column 5 FROM table1
As you can see I would like to select all of the columns from the table, but also select some of the columns based on certain conditions. Any hlep is greatly appreciated.
SELECT column1, column2, (SELECT column 3 WHERE column6 <= 12 AND column10 >= 1 AS YearlySum), column 3, column4, column 5 FROM table1
As you can see I would like to select all of the columns from the table, but also select some of the columns based on certain conditions. Any hlep is greatly appreciated.
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3 Comments
you cannot optionally select a column.
you could return a NULL value optionally ...
you could return a NULL value optionally ...
SELECT column1, column2
, CASE WHEN column6 <= 12 AND column10 >= 1 THEN column3 ELSE NULL END AS YearlySum
, column 3, column4, column 5
FROM table1
To accomplish this you need to use the CASE clause
But my first question will be this one, what if the condition you specified is not met? lets say Column 6 is grater then 12 and column 10 less than 1?
Thanks
But my first question will be this one, what if the condition you specified is not met? lets say Column 6 is grater then 12 and column 10 less than 1?
Thanks
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