在teradata中将行转换为列
我有一张像下面这样的桌子在teradata中将行转换为列,teradata,Teradata,我有一张像下面这样的桌子 Date_value| Class_ID | count 17-05-2016|1 | 200 17-05-2016|2 | 400 17-05-2016|3 |250 17-05-2016|4 | 300 18-05-2016|1 | 500 18-05-2016|2 | 600 18-05-2016|3 |750 18-05-2016|4
Date_value| Class_ID | count
17-05-2016|1 | 200
17-05-2016|2 | 400
17-05-2016|3 |250
17-05-2016|4 | 300
18-05-2016|1 | 500
18-05-2016|2 | 600
18-05-2016|3 |750
18-05-2016|4 | 800
现在我希望输出如下所示
Date_value|1 |2 |3 |4
17-05-2016|200 |400 | 250 |300
18-05-2016|500 |600 | 750 |800
提前感谢,,
NikhilaTeradata中没有PIVOT函数,但这只是一些语法,它创建了一个类似于以下内容的选择:
select
Date_value,
sum(case when Class_ID = 1 then "count" end as "1",
sum(case when Class_ID = 2 then "count" end as "2",
sum(case when Class_ID = 3 then "count" end as "3",
sum(case when Class_ID = 4 then "count" end as "4",
from tab
group by Date_value
Teradata中没有PIVOT函数,但这只是一些语法,可以创建类似于以下内容的选择:
select
Date_value,
sum(case when Class_ID = 1 then "count" end as "1",
sum(case when Class_ID = 2 then "count" end as "2",
sum(case when Class_ID = 3 then "count" end as "3",
sum(case when Class_ID = 4 then "count" end as "4",
from tab
group by Date_value