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Sql select statement inner join

Posted on 2016-07-27
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Last Modified: 2016-07-27
I want to return all value that match the following criteria.

Return  all value from column A that are identical   where we have one row in Column B value is  'Export B' and Column C = 0.0  also a another from that a value from Column B is Export  and Column C is 10.00

The result should be 21282

Column A--- Column B ---Column C
21282       ---      Export  --- 10.0
21282       ---      Export b  --- 0.0
21281       ---      Export  --- 10.0
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Question by:yguyon28
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4 Comments
 
LVL 143

Accepted Solution

by:
Guy Hengel [angelIII / a3] earned 500 total points
ID: 41732051
there will be several syntaxes to solve this, and depending on the real final requested output adifferent basic solution can be chosen.
select t.fieldA
 from yourtable t
 where t.fieldB = 'export'
   and t.fieldC = 0
 and exists( select null
   from yourtable o
   where o.fieldA = t.fieldA
     and o.fieldB = 'export b'
      and o.fieldC = 10
)

i may have mistyped some values, I presume you got the point of my suggestion
0
 
LVL 48

Expert Comment

by:PortletPaul
ID: 41732108
I think you can achieve it using group by and having clauses like this:
Select ColumnA
From table1
Where (ColumnB='Export' And ColumnC = 10.0)
OR
(ColumnB='Export b' and ColumnC =0.0)
Group by ColumnA
HAVING COUNT(*) = 2

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0
 
LVL 41

Expert Comment

by:Sharath
ID: 41732110
Not sure if I understand your problem correctly. Is this what you are looking for?
SELECT *
  FROM your_table
 WHERE (ColumnB = 'Export B' AND ColumnC = 0)
    OR (ColumnB = 'Export' AND ColumnC = 10)

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0
 
LVL 41

Expert Comment

by:Sharath
ID: 41732118
Well. Based on Paul's reply, If there are ColumnA values duplicated for first or second condition.
SELECT ColumnA
  FROM your_table
 WHERE (ColumnB = 'Export B' AND ColumnC = 0)
    OR (ColumnB = 'Export' AND ColumnC = 10)
 GROUP BY ColumnA
HAVING COUNT(DISTINCT CASE WHEN ColumnB = 'Export B' AND ColumnC = 0 THEN 1 WHEN ColumnB = 'Export' AND ColumnC = 10 THEN 2 END) = 2

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