I have data like this:
ID (UID), EID (ID of record), Name (Name of meta-field), Value (value of meta-field)
- 1,1,Name,A
- 2,1,Note,B
- 3,1,Additional,C
- 4,2,Name,Z
- 5,2,Note,Z
- 6,2,Additional,Z
- 7,3,Name,RICE
- 8,3,Note,DICE
- 9,3,Additional,MICE
I need a select (view) that looks like this:
EID, Name, Note, Additional
- 1,A,B,C
- 2,Z,Z,Z
- 3,Rice,Dice,Mice
I tried several selects but cant seem to get it, or find a suitable answer that helps, any help would be much appreciated.
This works for me (sqlFiddle)
SELECT t.EID, tname.Value Name, tnote.Value Note, tadd.Value Additional
FROM Table1 t
INNER JOIN Table1 tname ON tname.Name = "Name" AND tname.EID = t.EID
INNER JOIN Table1 tnote ON tnote.Name = "Note" AND tnote.EID = t.EID
INNER JOIN Table1 tadd ON tadd.Name = "Additional" AND tadd.EID = t.EID
GROUP BY t.EID
Since answering this I've acquired more knowledge of SQL variants other than MySQL. This would be a (more graceful) solution for MS SQL-Server:
select * from (
select EID, Name as Col, Value from Table1
) p
pivot (
min(Value)
for Col in (Name, Note, Additional)
) pvt
(Note that aliasing Name
to Col
is necessary because it would conflict with the Name
column of the pivoted result)