高手请进，动态sql如何传递参数？？
比如
declare @sql varchar(8000)
declare @FormNumber int
declare @LineNumber char(20)
declare @title varchar(32)
declare @for3 varchar(50)
declare @for2 varchar(50)
set @FormNumber =553919
set @LineNumber= '55391936 '
set @title = '九州 '
set @for3 = '大型店 '
set @for2 = '中型店 '
set @sql=
select
cast(BranchCode as varchar(3))+BranchName as branch
,[Format]
,cast(SyaKuSuu as varchar(2))+ ' '尺 ' '+cast(HonSuu as varchar(3))+ ' '本 ' ' as sh
,(case EntryType when 4 then ' 'O ' '
when 2 then ' 'O ' '
else ' ' ' '
end) syoki
,FourWeekSaleAVG
,(case EntryType when 4 then ' 'O ' ' else ' ' ' ' end)kaihai
from mst_change
where
FormNumber=@FormNumber
and
LineNumber=@LineNumber
and
title=@title
and
[Format] in (@for2,@for3)
select @sql
exec (@sql)
其中上面设置的参数如何传禁区呢
我在参数前后加上 ‘+@for3+’提示错误
[解决办法]
动态sql语句基本语法
1 :普通SQL语句可以用Exec执行
eg: Select * from tableName
Exec( 'select * from tableName ')
Exec sp_executesql N 'select * from tableName ' -- 请注意字符串前一定要加N
2:字段名，表名，数据库名之类作为变量时，必须用动态SQL
eg:
declare @fname varchar(20)
set @fname = 'FiledName '
Select @fname from tableName -- 错误,不会提示错误，但结果为固定值FiledName,并非所要。
Exec( 'select ' + @fname + ' from tableName ') -- 请注意 加号前后的 单引号的边上加空格
当然将字符串改成变量的形式也可
declare @fname varchar(20)
set @fname = 'FiledName ' --设置字段名
declare @s varchar(1000)
set @s = 'select ' + @fname + ' from tableName '
Exec(@s) -- 成功
exec sp_executesql @s -- 此句会报错
declare @s Nvarchar(1000) -- 注意此处改为nvarchar(1000)
set @s = 'select ' + @fname + ' from tableName '
Exec(@s) -- 成功
exec sp_executesql @s -- 此句正确
3. 输出参数
declare @num int,
@sqls nvarchar(4000)
set @sqls= 'select count(*) from tableName '
exec(@sqls)
--如何将exec执行结果放入变量中？
declare @num int,
@sqls nvarchar(4000)
set @sqls= 'select @a=count(*) from tableName '
exec sp_executesql @sqls,N '@a int output ',@num output
select @num
[解决办法]
set @sql= 'select
cast(BranchCode as varchar(3))+BranchName as branch
,[Format]
,cast(SyaKuSuu as varchar(2))+ ' '尺 ' '+cast(HonSuu as varchar(3))+ ' '本 ' ' as sh
,(case EntryType when 4 then ' 'O ' '
when 2 then ' 'O ' '
else ' ' ' '
end) syoki
,FourWeekSaleAVG
,(case EntryType when 4 then ' 'O ' ' else ' ' ' ' end)kaihai
from mst_change
where
FormNumber= ' +cast(@FormNumber as varchar) +
' and
LineNumber= ' +cast(@LineNumber as varchar) +
' and
title= ' +cast(@title as varchar)+
' and
[Format] in ( '+cast(@for2 as varchar)+ ', '+cast(@for3 as varchar)+ ') '
[解决办法]
用N '@for3代替@for3，前后字符串连接符号自己考虑
[解决办法]
up
[解决办法]
更正一下语法错误,实现效果楼主再看看
declare @sql varchar(8000)
declare @FormNumber int
declare @LineNumber char(20)
declare @title varchar(32)
declare @for3 varchar(50)
declare @for2 varchar(50)
set @FormNumber =553919
set @LineNumber= '55391936 '
set @title = '九州 '
set @for3 = '大型店 '
set @for2 = '中型店 '
set @sql= ' '
select
cast(BranchCode as varchar(3))+BranchName as branch
,[Format]
,cast(SyaKuSuu as varchar(2))+quotename( '尺 ', ' ' ' ')+cast(HonSuu as varchar(3))+quotename( '本 ', ' ' ' ') as sh
,(case EntryType when 4 then quotename( 'O ', ' ' ' ')
when 2 then quotename( 'O ', ' ' ' ')
else ' ' ' ' ' '
end) syoki
,FourWeekSaleAVG
,(case EntryType when 4 then ' ' 'O ' ' ' else ' ' ' ' end)kaihai
from mst_change
where
FormNumber=@FormNumber
and
LineNumber=@LineNumber
and
title=@title
and
[Format] in (@for2,@for3)
select @sql
exec (@sql)
