sql statement inside decode clause

The decode works like this:

SELECT DECODE('col1', 'x', 'result1','y','result2') resultFinal 
 FROM table1;

It possible to accomplish this in sql:

SELECT * 
  FROM (SELECT DECODE('col1', 'x' (someSql),'y',(someOthersql)) result 
          FROM table1)

So instead of result1 and result2 being fixed values, they would be sql statements. If not possible, h开发者_开发百科ow can I achieve the same result without a stored proc.

EDIT: someSql and someOthersql are both complex queries with many joins returining many but same number of cols with same col names.

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If someSql and someOthersql return exactly one row with one column, then this should work.

The following works for me:

select decode(col, (select 'foo' from dual), (select 'bar' from dual))
from some table

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I think you may need to create a PL/SQL procedure to handle the complex logic.