今天在聊天系统中需要系统执行一个多层嵌套查询。
一开始语句如下总出现错误：原来是在]='123') 后我多加了一个 as tb1
改为如下后，正确运行。
select * from ( select top(10) * from ( select top(100) * from (select [chatcontent].[senderid],[chatcontent].[id] ,[chatcontent].[toid] ,[chatcontent].[sendtime] ,[chatcontent].[sendcontent] from [chatcontent] where [chatcontent].[id] not in (select [messageid] from [messagereaded] where [messagereaded].[toid]='123') ) as tb2) as tb3) as tb4
create PROCEDURE zdy_CBFY (@SFSS VARCHAR(1),@DWBH varchar(20),@KMBH VARCHAR(10),@KJND VARCHAR(4))
AS
DECLARE @ZWkmye varchar(20),@zwkmzd varchar(20),@ZWSSKMYE varchar(20)
set @zwkmye='zwkmye'+@kjnd
SET @ZWKMZD='ZWKMZD'+@KJND
SET @ZWSSKMYE='ZWSSKMYE'+@KJND
其 ......
<?xml version="1.0" encoding="utf-8"?>
<configuration>
<appSettings>
<add key="Default" value="Default" />
</appSettings>
<connectionStrings>
<add name="Default" connectionString="Data Source=192.168.1.197;User ID ......
