Sql 为什么insert语句会出错？

我的insert语句中的逗号不断出错。你知道为什么会这样吗

以下是错误消息：

Msg 102，15级，状态1，第3行 “，”附近的语法不正确

以及INSERT INTO…SELECT语句

insert into custflag (cust_no, flag)
  select 
      customer.cust_no 
  from 
      customer, dupaddr 
  where 
      customer.cust_no = dupaddr.cust_no, select cast(flag as int) 
                                           from flag 
                                           where flag_desc = 'Dup Customer'

这是我查询的完整代码

SET IDENTITY_INSERT flag ON
insert into flag (flag,flag_desc,available)
values ((select Max(flag) from flag) + 1, 'Dup Customer', 1)

create view dupaddr as 
select distinct c1.cust_no, c1.firstname, c1.lastname, c1.company, c1.predir + ' ' + c1.streetno + ' ' + c1.streetnm + ' ' + c1.suffix + ' ' + c1.postdir as fff ,c1.address2
from customer c1,customer c2 
where c1.cust_no <> c2.cust_no
and c1.firstname = c2.firstname 
and c1.lastname = c2.lastname 
and c1.company = c2.company
and c1.predir + ' ' + c1.streetno + ' ' + c1.streetnm + ' ' + c1.suffix + ' ' +   c1.postdir = c2.predir + ' ' + c2.streetno + ' ' + c2.streetnm + ' ' + c2.suffix + ' ' + c2.postdir 
and c1.address2 = c2.address2



insert into custflag (cust_no,flag)
select customer.cust_no from customer, dupaddr where customer.cust_no = dupaddr.cust_no , select cast(flag as int) from flag where flag_desc = 'Dup Customer'

我将这个标志添加到视图中，并能够简化insert语句。谢谢大家的帮助

SET IDENTITY_INSERT flag ON
insert into flag (flag,flag_desc,available)
values ((select Max(flag) from flag) + 1, 'Dup Customer', 1)

create view dupaddr as 
select distinct c1.cust_no, 
c1.firstname, 
c1.lastname, 
c1.company, 
c1.predir + ' ' + c1.streetno + ' ' + c1.streetnm + ' ' + c1.suffix + ' ' +   c1.postdir as fff ,
c1.address2, 
(SELECT cast(flag as int) FROM flag  WHERE flag_desc = 'Dup Customer') as flag
from customer c1,customer c2 
where c1.cust_no <> c2.cust_no
and c1.firstname = c2.firstname 
and c1.lastname = c2.lastname 
and c1.company = c2.company
and c1.predir + ' ' + c1.streetno + ' ' + c1.streetnm + ' ' + c1.suffix + ' ' +  c1.postdir = c2.predir + ' ' + c2.streetno + ' ' + c2.streetnm + ' ' + c2.suffix + ' ' + c2.postdir 
and c1.address2 = c2.address2



insert into custflag (cust_no,flag)
select dupaddr.cust_no, dupaddr.flag from dupaddr

---

为了使查询工作正常，下面是等效代码

INSERT  INTO custFlag(cust_no, flag)
SELECT  a.cust_no, c.flag
FROM    customer a
        INNER JOIN dupaddr b
            ON a.cust_no = b.cust_no
        INNER JOIN
        (
            SELECT  cust_no, cast(flag as int) flag
            FROM    flag 
            WHERE   flag_desc = 'Dup Customer'
        ) c ON a.cust_no = c.cust_no

但我怀疑交叉连接不是您想要的，您能告诉我table flag与customer和dupaddr的关系吗？

---

正如我所评论的-不知何故，您的代码有点混乱。。。。尚不清楚这三个表customer、dupaddr和flag是如何关联的——它们应该正确地连接起来，以便您可以从单个SELECT语句中获取cust_no和flag

我根本看不出Flag与其他表有什么关系——坦白地说，我根本不明白为什么这里需要dupaddr表

因此，请尝试以下方法：

insert into custflag (cust_no, flag)
  select 
      customer.cust_no,
      (select cast(flag as int) from flag where flag_desc = 'Dup Customer')
  from 
      customer
  inner join
      dupaddr on customer.cust_no = dupaddr.cust_no  -- why do you need this???

或者，由于该标志似乎与所选的任何行都不相关，因此您也可以在语句之前获取一次：

declare @flag INT
select @flag = cast(flag as int) from flag where flag_desc = 'Dup Customer'

insert into custflag (cust_no, flag)
  select 
      customer.cust_no, @flag
  from 
      customer
  inner join
      dupaddr on customer.cust_no = dupaddr.cust_no  -- why do you need this???

你可以试试这个

insert into custflag (cust_no, flag)
  select 
      customer.cust_no, (select cast(flag as int) 
                                           from flag 
                                           where flag_desc = 'Dup Customer') 
  from 
      customer, dupaddr 
  where 
      customer.cust_no = dupaddr.cust_no

---

这个表customer，dupaddr，flag之间的关系是什么？最后一个SELECT CASTFlag AS INT应该做什么？这是错误的部分…..您需要以适当的方式联接表customer、dupaddr和flag，以便可以从这些联接表中选择两个项目cust_no和flag-您不能在使用它的位置使用另一个子查询-不起作用。flag表仅包含custflagid、FLAGNAMERIAL值，cust_no.dupadder是我创建的一个视图，用于获取具有不同cust_no但具有相同地址的所有客户的列表。flag表只包含custflagid、flagnumeric值，而cust_no.dupadder是我创建的一个视图，用于获取具有不同cust_no但具有相同地址的所有客户的列表抱歉，此评论是错误的，标志表中没有cust_no列