sql - SELECT based on the result of another SELECT -


is possible run select based on result of first select?

for example: 

select count(*) table1

if result 0, want display result of:

select a, b, c table2

if result of first select not 0, display result of first query , ignore second.

you can run second select based on results of first:

you this:

declare @count integer = (select count(*) table1)  if @count = 0     select ... table1 else     select ... table2

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