--多表關聯彙總在ms sql和access中的寫法
--ms sql
--建立測試環境
create table ws_employee
(id int,
name varchar(10)
)insert into ws_employee
select 1,'a' union all
select 2,'b' union all
select 3,'c' union all
select 4,'d' union all
select 5,'e' union all
select 6,'f'
create table ws_jjgz
(id int,
員工id int,
price int
)insert into ws_jjgz
select 1,1,125 union all
select 2,2,122 union all
select 3,3,111 union all
select 4,1,212 union all
select 5,1,111 union all
select 6,2,121
create table ws_jsgz
(id int,
員工id int,
price int
)insert into ws_jsgz
select 1,1,125 union all
select 2,2,122 union all
select 3,3,111 union all
select 4,1,212 union all
select 5,1,111 union all
select 6,2,121
go--測試
select
id,name,
isnull(b.price,0) as 計件總工資,
isnull(c.price,0) as 計時總工資,
isnull(b.price,0) + isnull(c.price,0) as 總工資
from
ws_employee a
left join
(select 員工id, sum(price) as price from ws_jjgz group by 員工id) b
on a.id = b.員工id
left join
(select 員工id, sum(price) as price from ws_jsgz group by 員工id) c
on a.id = c.員工id
--刪除測試環境
drop table ws_employee, ws_jjgz, ws_jsgz
--結果
/*id name 計件總工資 計時總工資 總工資
1 a 448 448 896
2 b 243 243 486
3 c 111 111 222
4 d 0 0 0
5 e 0 0 0
6 f 0 0 0
*/--access
/*select
id,
name,
iif(isnull(b.sumprice), 0, b.sumprice) as 計件總工資,
iif(isnull(c.sumprice), 0, c.sumprice) as 計時總工資,
iif(isnull(b.sumprice), 0, b.sumprice) + iif(isnull(c.sumprice), 0, c.sumprice) as 總工資
from
(ws_employee as a
left join [select 員工id, sum(price) as sumprice from ws_jjgz group by 員工id]. as b on a.id = b.員工id)
left join [select 員工id, sum(price) as sumprice from ws_jsgz group by 員工id]. as c on a.id = c.員工id;
*//*
注意的地方
1. ms sql中的isnull在access中用iif代替，access中的isnull只是用來判斷是否為null
2. access中多個join，前乙個join的子句要用"()"括起來
3. access會自動給子查詢前後加上"",這時候"]"後面的"."不能刪除，否則會報錯
*/
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