.數據表t_test

id????? 銷售人員id???????? 商品id?????????? 數量

id?????? emp_id??????????? product_id?????? qty

1??????? 01???????????????????? 001?????????????? 200

2??????? 01???????????????????? 002?????????????? 300

2??????? 01???????????????????? 002?????????????? 400

3??????? 02????????????????????? 001????????????? 400

4??????? 02????????????????????? 002??????????????? 500

?

Create?table?#t_test(
id?int?not?null,
emp_id?int?not?null,
product_id?int?not?null,
qty?int?not?null
)
insert?into?#t_test?values(1,01,001,200)
insert?into?#t_test?values(2,01,002,300)
insert?into?#t_test?values(3,01,002,400)
insert?into?#t_test?values(4,02,001,400)
insert?into?#t_test?values(5,02,002,500)

select?*?
from?#t_test

?

?

?

2.需要得到的結果

需要得到類似下面的結果

--------------------------------------

emp_id??????????????????? qty

01?????????????????????????? 900

02?????????????????????????? 900

合計??????????????????????? 1800

--------------------------------------

大家看到了,這里加上了一個合計列

參考sql語句如下

?

--?for?MS?SQL?Server?2005
select?isnull(CONVERT(varchar(20),?emp_id),'Total')?as?'emp_id'?
????,sum(qty)?as?'qty_Total'
from?#t_test
group?by?emp_id
with?rollup

?

查詢的結果如下所示

emp_id qty_Total

1　　　　?900
2　　　　?900
Total　　?1800

?

3.負責一點,統計每個銷售人員以及商品的數量

?

--------------------------------------

emp_id???????? product_id???????????? qty

01???????????????? 001??????????????????????? 200

01????????????????? 001?????????????????????? 700

01????????????????? 小計????????????????????? 900

02???????????????? 001????????????????????????? 400

02???????????????? 002????????????????????????? 500

02???????????????? 小計???????????????????????? 900

合計??????????????????????????????????????????? 1800

--------------------------------------

由于要統計合計以及小計,不能簡單的用nvl來產生"合計"了,要用grouping函數,來判斷者某行是否有rollup產生的合計行,

select

case when grouping(emp_id)=1 and grouping(product_id)=1 then '合計' else emp_id end emp_id,

case when grouping(emp_id)=0 and grouping(product_id)=1 then '小計' else procudt_id end product_id,

sum(qty) qty

from t_test

group by rollup(emp_id,product_id)

注意,grouping(emp_id)=1,說明是有rollup函數生成的行,0為數據庫本身有的行

?

?

轉載于:https://www.cnblogs.com/Steven7Gao/archive/2009/11/22/1608227.html

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