Table 1
-------
LANG_VALUE
LANG_DESC
Table 2
-------
EmpId
LANG1
LANG2
LANG3
LANG4
LANG5
LANG6
它看起来像如下:连接两个表 - 多列单列
Table 1
-------
LANGVALUE LANGDESC
-------------------
SPAN SPANISH
GERM GERMAN
Table 2
-------
EmpId LANG1 LANG2 LANG3 LANG4 LANG5 LANG6
-----------------------------------------
1 SPAN NULL NULL NULL NULL NULL
2 GERM SPAN NULL NULL NULL NULL
3 GERM NULL NULL NULL NULL NULL
预期结果:
EmpId LANG1 LANG2 LANG3 LANG4 LANG5 LANG6
-----------------------------------------
1 SPANISH NULL ...
2 GERMAN SPANISH NULL...
3 GERMAN NULL...
如何做到这一点的SQL查询?
感谢这有助于... – Nick 2009-10-29 22:33:13