Question

I’m trying to do a Select Statement in Oracle using the Operator LIKE % and for some reason the lines of output are taking on zipcodes of different people. Here is my code:

Select Distinct a.empno,a.ename,a.sal,a.job,b.empadr,b.empstate,b.empzip
From EMP a, EMPADDRESS b
Where a.empno = b.empno
And b.empzip Like '1%'
Or b.empzip Like '8%'

I tried adding brackets around the AND and OR but that didn’t seem to work. I’m assuming it has something to do with how I wrote the columns in the first line but I’m not sure. If that is the case can someone explain why that happens, I would hate to have this problem again. Thanks in advance to all that answer.

Answer 1

The brackets are missing:

Select Distinct a.empno,a.ename,a.sal,a.job,b.empadr,b.empstate,b.empzip 
  From EMP a, EMPADDRESS b
 Where a.empno = b.empno
   And (b.empzip Like '1%' Or b.empzip Like '8%');

or you could use the JOIN syntax

SELECT Distinct empno,a.ename,a.sal,a.job,b.empadr,b.empstate,b.empzip 
  FROM emp a JOIN empaddress b USING (empno)
 WHERE b.empzip Like '1%' Or b.empzip Like '8%';