Microsoft Access?? UNPIVOT ??
?? ??: MS Access 2010?? SQL Server 2005 ??? ?? UNPIVOT ??? ????. ? ?????? Access? ??? SQL ??? ???? ??? ??? ?? ??? ?????.
????:
?? ??? ??? ??? ???.
| ID | A | B | C | Key 1 | Key 2 | Key 3 |
|---|---|---|---|---|---|---|
| 1 | x | y | z | 3 | 199 | 452 |
| 2 | x | y | z | 57 | 234 | 452 |
??? ???? ?? ???? ???? ????.
| ID | A | B | C | Key |
|---|---|---|---|---|
| 1 | x | y | z | 3 |
| 2 | x | y | z | 57 |
| 1 | x | y | z | 199 |
| 2 | x | y | z | 234 |
| 1 | x | y | z | 452 |
| 2 | x | y | z | 452 |
???:
UNPIVOT ??? Access SQL ?? ?? ??? UNION ALL ?? ???? ??? ? ????.
SELECT ID, A, B, C, [Key 1] AS Key FROM tblUnpivotSource UNION ALL SELECT ID, A, B, C, [Key 2] AS Key FROM tblUnpivotSource UNION ALL SELECT ID, A, B, C, [Key 3] AS Key FROM tblUnpivotSource;
??:
?? ???? ?? ? ??? ???? ??? ???? ?? ??? ??? ?????.
| ID | A | B | C | Key |
|---|---|---|---|---|
| 1 | x | y | z | 3 |
| 2 | x | y | z | 57 |
| 1 | x | y | z | 199 |
| 2 | x | y | z | 234 |
| 1 | x | y | z | 452 |
| 2 | x | y | z | 452 |
? ??? MS Access?? UNPIVOT ??? ???? ??? ??????? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!
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