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crosstab with oracle

Posted on 1997-12-17
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How can i get a crosstab with oracle sql ?
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Question by:pifede
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scjonson earned 200 total points
ID: 1081286
In order to get a crosstab in SQL you need to use the Decode statement.  The values accross the top need to be known.  The values down the left will be the column which is grouped by.

If an individual table has a column for age and a column for gender here's what you'd do:

SELECT Age,
              sum(decode(v_gender,'F',1,0)) "Female",
              sum(decode(v_gender,'M','1',0)) "Male"
FROM individual
group by age

The results would look like:
      Age    Female      Male
     ---------    ---------     ---------
       17         1              2
       18         0              4
       19         3            11
       20        11           19
       21        14           21
       22        12             9
       23         5            20
    etc.

To make a dynamic crosstab report dynamic SQL would have to be used.
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