Question

I have the following SELECT …

    SELECT CASE WHEN cola < 0 THEN '-'
                WHEN cola > 0 THEN '+'
                ELSE '='
           END
           SUM(colb), SUM(colc), SUM(cold),
           MAX(CASE WHEN cola < 0 THEN 1
                    WHEN cola > 0 THEN 3
                    ELSE 2
              ) AS Sort
      FROM Table1
     WHERE this = that
  GROUP BY CASE WHEN cola < 0 THEN '-'
                WHEN cola > 0 THEN '+'
                ELSE '=' END
  ORDER BY cold

This is what I’m getting:

cola    colb   colc   cold
-        1       2     1
+        13      0     3

This is what I’m wanting:

cola    colb   colc   cold
-        1       2     1
=        0       0     2
+        13      0     3

When I get a result set I have ‘+’ and ‘-‘ rows but no ‘=’ row because there weren’t any ‘0’ values to trigger the ELSE. How can I have it set so that if this is the case then it would still have a ‘=’ row in my SELECT statement?

Thanks! *If more of the select is required just let me know.

Answer 1

SELECT
       foo.symbol,
       SUM(colb), SUM(colc), SUM(cold)
  FROM
        (SELECT '-' AS Symbol, 1 As Sort 
         UNION ALL SELECT '=', 2
         UNION ALL SELECT '+', 3
        ) foo
        LEFT JOIN
        Table1 ON foo.symbol = CASE WHEN cola < 0 THEN '-'
            WHEN cola > 0 THEN '+'
            ELSE '='
       END
 WHERE this = that
GROUP BY foo.symbol, foo.sort
ORDER BY foo.sort

You may need a derived table for Table1 too to apply the filter correctly. You can push th CASE into this

Edit, after comments, even simpler thanks to @WReach

SELECT
       foo.SignAndSort,
       SUM(colb), SUM(colc), SUM(cold)
  FROM
        (SELECT '-1' AS SignAndSort
         UNION ALL SELECT '0'
         UNION ALL SELECT '-1'
        ) foo
        LEFT JOIN
        Table1 ON foo.SignAndSort = SIGN(cola)
 WHERE this = that
GROUP BY foo.SignAndSort
ORDER BY foo.SignAndSort