Question

--CREATE TABLE Table1 (IssNo INT,  Qty INT)
--INSERT INTO Table1 VALUES (120,10)

--CREATE TABLE Table2 (IssNo INT,  Qty INT)
--INSERT INTO Table2 VALUES (120,20)
--INSERT INTO Table2 VALUES (124,30)

表1

IssNo Qty
120 10

表2

IssNo Qty
120 20
124 30

也可以使用它：

从表1 - ＆gt;

substring（Table1.IssNo，1,2），最后我需要添加“％”（例如）12％

现在我需要检查这个类似于table2中的条件。对于Qty ..并且我需要添加所有数量为12％（例如）20和30将来...后来SUM =＆gt; 50

我的查询是Select Name,id,IssNo,address,Qty from Table1（此处仅数量应该是表2的总和）

预期o / p

IssNo    Qty
120      50(Sum of Qty from Table2)

Answer 1

试试这个：

Select Table1.IssNo,Sum(Table2.Qty) as Qty
From Table1 inner join  Table2  
on  Cast(Table2.IssNo as varchar) like substring(cast(Table1.IssNo as varchar),1,2) + '%'  
Group By Table1.IssNo

Answer 2

尝试以下查询。

declare @IssNo as varchar(10) -- whatever length you want

 select @IssNo =  substring(cast(Table1.IssNo as varchar),1,2) + '%'  from Table1

 Select Table2.IssNo,Sum(Table2.Qty) as Qty
 From Table2 
 Where Cast(Table2.IssNo as varchar) like @IssNo
 Group By Table2.IssNo

Answer 3

试试这个

select t1.issno,(select sum(qty) from table2) as qty
from table1 t1 inner join table2 t2
on t1.issno=t2.issno;

OR

select t1.issno,(select sum(qty) from table2) as qty
from table1 t1;

fiddle

怎么能重新解决这个SQL查询？

3 个答案: