Question

I want to get the users who confirm twice for the same document.

My table is like this:

emp_num -- serial -- doc_num

I want to get result like this:

344 -- 11 -- 3
344 -- 12 -- 3
344 -- 13 -- 3
756 -- 45 -- 16
756 -- 48 -- 16

and so on.

How can I do this?

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My result :

344 -- 11 -- 3
344 -- 12 -- 3
344 -- 13 -- 3
756 -- 45 -- 16
756 -- 48 -- 16
333 -- 56 -- 77
564 -- 79 -- 87
564 -- 80 -- 87

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i don’t want the emp_num = 333 included in the result because it’s a one record.

Answer 1

Stack over flow “works best” if an attempt is shown in the post. This shows effort, allows explanation of refinements/errors, and helps to clarify intent ..

In any case, this is likely close to what is desired:

 select t1.*
 from theTable t1
 join theTable t2
 on t1.emp_num = t2.emp_num     -- look at records for same employee
   and t1.doc_num = t2.doc_num  -- that have the same document num
   and t1.serial <> t2.serial   -- but have a different "serial"