I have a table like
| ID | COL1 | COL2 |
| 1 | 1 | w |
| 1 | 2 | x |
| 2 | 1 | y |
| 2 | 2 | z |
When I query it, I'd like to get
| ID | COL2:1 | COL2:2 | <--- (when COL1=1 and COL1 =2)
| 1 | w | x |
| 2 | y | z |
I've tried GROUP BY
and JOIN
for the same table but I get duplicates and not grouped data. I need some pointers for how to get the results I'm expecting.
You can use MAX()
and a CASE
statement for this:
SELECT ID
,MAX(CASE WHEN Col1 = 1 THEN Col2 END) AS Col2_1
,MAX(CASE WHEN Col1 = 2 THEN Col2 END) AS Col2_2
FROM YourTable
GROUP BY ID
Demo: SQL Fiddle
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