billno id itemno price
10000 20060 ESD_01 1.30
10000 20068 ESD_23 52.30
10002 12521 ESD_98 12.20
10002 12521 ESD_98 15.23
10003 12554 FRD_52 125.22
........這是一張票具的表體,billno id itemno 聯合主健,billno 關聯表頭,要求結果集如下:billno id itemno price
10000 1 ESD_01 1.30
10000 2 ESD_23 52.30
10002 1 ESD_98 12.20
10002 2 ESD_98 15.23
10003 1 FRD_52 125.22求sql語句一條,多謝
10000 20060 ESD_01 1.30
10000 20068 ESD_23 52.30
10002 12521 ESD_98 12.20
10002 12521 ESD_98 15.23
10003 12554 FRD_52 125.22
........這是一張票具的表體,billno id itemno 聯合主健,billno 關聯表頭,要求結果集如下:billno id itemno price
10000 1 ESD_01 1.30
10000 2 ESD_23 52.30
10002 1 ESD_98 12.20
10002 2 ESD_98 15.23
10003 1 FRD_52 125.22求sql語句一條,多謝
declare @tab table(billno int,id int,itemno varchar(20),price decimal(10,2))insert @tab values(10000,20060,'ESD_01',1.30)
insert @tab values(10000,20068,'ESD_23',52.30)
insert @tab values(10002,12521,'ESD_98',12.20)
insert @tab values(10002,12521,'ESD_98',15.23)
insert @tab values(10003,12554,'FRD_52',125.22)select billno,id=(select count(1)+1 from @tab where billno=a.billno and price<a.price),itemno,price from @tab a
declare @tab table(billno int,id int,itemno varchar(20),price decimal(10,2))insert @tab values(10000,20060,'ESD_01',1.30)
insert @tab values(10000,20068,'ESD_23',52.30)
insert @tab values(10002,12521,'ESD_98',12.20)
insert @tab values(10002,12521,'ESD_98',15.23)
insert @tab values(10003,12554,'FRD_52',125.22)select billno,
id=(select count(1)+1 from @tab where billno=a.billno and (price<a.price or itemno<a.itemno)),itemno,price
from @tab a
*****************************************************************************
------------------------
即使你的需求没要求比较同BillNo行
但是,为了得到序列值,需要我们在算法上建立不同行比较
*****************************************************************************
要求不同之外。。其他的都可以相同。。也就是其他的可能完全一样
a b c
7 aa 153
9 aa 152
6 aa 120
8 aa 168
5 bb 159
7 bb 179
8 bb 149
9 bb 139
6 bb 169
对b列中的值来分类排序并分别加一序号,形成一新表
px a b c
1 6 aa 120
2 9 aa 152
3 7 aa 153
4 8 aa 168
1 9 bb 139
2 8 bb 149
3 5 bb 159
4 6 bb 169
5 7 bb 179
declare @tab table(a int,b varchar(2),c int)insert @tab values(7,'aa',153)
insert @tab values(9,'aa',152)
insert @tab values(6,'aa',120)
insert @tab values(8,'aa',168)
insert @tab values(5,'bb',159)
insert @tab values(7,'bb',179)
insert @tab values(8,'bb',149)
insert @tab values(9,'bb',139)
insert @tab values(6,'bb',169)select * from @tabselect px=(select count(1) from @tab where b=a.b and c<a.c)+1 , a,b,c from @tab a
order by b , c px a b c
----------- ----------- ---- -----------
1 6 aa 120
2 9 aa 152
3 7 aa 153
4 8 aa 168
1 9 bb 139
2 8 bb 149
3 5 bb 159
4 6 bb 169
5 7 bb 179(所影响的行数为 9 行)
在上面例中我们看到,以B分类排序,C是从小到大,如果C从大到小排序,即下面结果:
px a b c
1 8 aa 168
2 9 aa 153
3 7 aa 152
4 6 aa 120
1 7 bb 179
2 6 bb 169
3 5 bb 159
4 8 bb 149
5 9 bb 139declare @tab table(a int,b varchar(2),c int)insert @tab values(7,'aa',153)
insert @tab values(9,'aa',152)
insert @tab values(6,'aa',120)
insert @tab values(8,'aa',168)
insert @tab values(5,'bb',159)
insert @tab values(7,'bb',179)
insert @tab values(8,'bb',149)
insert @tab values(9,'bb',139)
insert @tab values(6,'bb',169)select * from @tabselect px=(select count(1) from @tab where b=a.b and c>a.c)+1 , a,b,c from @tab a
order by b , c descpx a b c
----------- ----------- ---- -----------
1 8 aa 168
2 7 aa 153
3 9 aa 152
4 6 aa 120
1 7 bb 179
2 6 bb 169
3 5 bb 159
4 8 bb 149
5 9 bb 139(所影响的行数为 9 行)
drop table tb
gocreate table tb
(
billno varchar(10),
id varchar(10),
itemno varchar(10),
price decimal(18,2)
)insert into tb(billno,id,itemno,price) values('10000','20060','ESD_01',1.30)
insert into tb(billno,id,itemno,price) values('10000','20068','ESD_23',52.30)
insert into tb(billno,id,itemno,price) values('10002','12521','ESD_98',12.20)
insert into tb(billno,id,itemno,price) values('10002','12521','ESD_98',15.23)
insert into tb(billno,id,itemno,price) values('10003','12554','FRD_52',125.22)select billno , id=(select count(1) from tb where billno=a.billno and price<a.price)+1 , itemno,price from tb a
order by billno , pricedrop table tbbillno id itemno price
---------- ----------- ---------- --------------------
10000 1 ESD_01 1.30
10000 2 ESD_23 52.30
10002 1 ESD_98 12.20
10002 2 ESD_98 15.23
10003 1 FRD_52 125.22(所影响的行数为 5 行)
drop table tb
gocreate table tb
(
billno varchar(10),
id varchar(10),
itemno varchar(10),
price decimal(18,2)
)insert into tb(billno,id,itemno,price) values('10000','20060','ESD_01',1.30)
insert into tb(billno,id,itemno,price) values('10000','20068','ESD_23',1.30)
insert into tb(billno,id,itemno,price) values('10002','12521','ESD_98',12.20)
insert into tb(billno,id,itemno,price) values('10002','12521','ESD_98',15.23)
insert into tb(billno,id,itemno,price) values('10003','12554','FRD_52',125.22)select billno , id=(select count(1) from tb where billno=a.billno and price<a.price)+1 , itemno,price from tb a
order by billno , pricedrop table tbbillno id itemno price
---------- ----------- ---------- --------------------
10000 1 ESD_01 1.30
10000 1 ESD_23 1.30
10002 1 ESD_98 12.20
10002 2 ESD_98 15.23
10003 1 FRD_52 125.22(所影响的行数为 5 行)
id itemno price
---------- ----------- ---------- --------------------
10000 1 ESD_01 1.30
10000 2 ESD_23 1.30
10002 1 ESD_98 12.20有 1,2 这样拍下来