我遇到了一个涉及将水平行转换为垂直行的SQL查询(SQL Server)
以下是我的数据
No Flag_1 Flag_2 Flag_3
--- ---- ----- -----
A 1 2 3
B 4 1 6
转换后,表格应为
No FlagsName Flag_value
-- ---- ----------
A Flag_1 1
A Flag_2 2
A Flag_3 3
B Flag_1 4
B Flag_2 1
B Flag_3 6
对此有任何意见会有帮助吗?
我正试图在分区上ROW_NUMBER
玩游戏。但它不能以某种方式工作!!!
谢谢!!!
答案 0 :(得分:12)
您可以使用UNION ALL
:
select No, 'Flag_1' as FlagName, Flag_1 as Flag_Value
from yourtable
union all
select No, 'Flag_2' as FlagName, Flag_2 as Flag_Value
from yourtable
union all
select No, 'Flag_3' as FlagName, Flag_3 as Flag_Value
from yourtable
或UNPIVOT
:
select no, FlagsName, flag_value
from yourtable
unpivot
(
flag_value
for FlagsName in (Flag_1, Flag_2, Flag_3)
) u