problem with sql query of a Crystal Report

When I create a new command of a report that looks like that

select e.x, a.x, a.y
from T开发者_StackOverflowable1 t,
     table2 a
where a.z = e.z
  and a.xx = form1.ComboBox1.Text

it generates an error. Is there a way to do it?

Thanks

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Your columns need to have different names to each other - at present, the first two columns are both called x. Also, if your ComboBox has multiple values, you need to use an IN condition, not an =. Try changing the query to look like:

select e.x e_x, a.x a_x, a.y
from Table1 e,
     table2 a
where a.z = e.z
  and a.xx IN (form1.ComboBox1.Text)