Sql server SQL Server将行转换为列
我正在处理TSQL存储过程,需要将临时表列转换为行。目前我正在使用一个接一个地更新表,但我认为使用pivot和unpivot可以很容易地实现这一点 数据源:Sql server SQL Server将行转换为列,sql-server,tsql,stored-procedures,Sql Server,Tsql,Stored Procedures,我正在处理TSQL存储过程,需要将临时表列转换为行。目前我正在使用一个接一个地更新表,但我认为使用pivot和unpivot可以很容易地实现这一点 数据源: Periods Stat1 Stat2 Stat3 Stat4 -------------------------------------------------------- Value1 1.011 1.012 1.013 1.014 Value
Periods Stat1 Stat2 Stat3 Stat4
--------------------------------------------------------
Value1 1.011 1.012 1.013 1.014
Value2 1.011 1.021 1.031 1.041
Value3 1.011 2.211 1.311 1.411
Stats Value1 Value2 Value3
-----------------------------------------------
Stat1 1.011 1.011 1.011
Stat2 1.012 1.021 1.211
Stat3 1.013 1.031 1.311
Stat4 1.014 1.041 1.411
预期产出:
Periods Stat1 Stat2 Stat3 Stat4
--------------------------------------------------------
Value1 1.011 1.012 1.013 1.014
Value2 1.011 1.021 1.031 1.041
Value3 1.011 2.211 1.311 1.411
Stats Value1 Value2 Value3
-----------------------------------------------
Stat1 1.011 1.011 1.011
Stat2 1.012 1.021 1.211
Stat3 1.013 1.031 1.311
Stat4 1.014 1.041 1.411
非常感谢您在这方面提供的帮助?正如您所指出的,这是一个取消激励然后旋转数据的过程:
with statTable as
(
select periods = 'Value1', Stat1 = 1.011, Stat2 = 1.012, Stat3 = 1.013, Stat4 = 1.014
union all select 'Value2', 1.011, 1.021, 1.031, 1.041
union all select 'Value3', 1.011, 2.211, 1.311, 1.411
)
, up as
(
select periods,
c.[Stats],
c.value
from statTable
cross apply
(
values ('Stat1', Stat1), ('Stat2', Stat2), ('Stat3', Stat3), ('Stat4', Stat4)
) c ([Stats], value)
)
select [Stats],
Value1,
Value2,
Value3
from up
pivot
(
sum(value)
for periods in (Value1, Value2, Value3)
) p
如果未使用SQL Server 2008或更高版本,则可以使用UNPIVOT而不是交叉应用:
with statTable as
(
select periods = 'Value1', Stat1 = 1.011, Stat2 = 1.012, Stat3 = 1.013, Stat4 = 1.014
union all select 'Value2', 1.011, 1.021, 1.031, 1.041
union all select 'Value3', 1.011, 2.211, 1.311, 1.411
)
, up as
(
select periods,
up.[Stats],
up.value
from statTable
unpivot
(
value
for [Stats] in (Stat1, Stat2, Stat3, Stat4)
) up
)
select [Stats],
Value1,
Value2,
Value3
from up
pivot
(
sum(value)
for periods in (Value1, Value2, Value3)
) p
.我已经检查过它包含一些解决方案,但仍然无法与此匹配。谢谢伊恩。看来这应该能解决我的问题。我查一下。