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存储过程里怎么实现字符串SQL和日期类型参数的相连
写了一个测试用的存储过程
CREATE PROCEDURE test
(
@startTime datetime,
@aa int
)
as
begin
declare @SQL varchar(1000)
set @SQL='select * from Customer where ApplyTime>='
if @aa<>0
begin
set @SQL=@SQL+@startTime
end
exec sp_executesql @SQL
END
return
哪位大G帮我看看是咋回事呀.老说字符串转日期类型出错.明明@startTime就是日期类型呀.
CREATE PROCEDURE test
(
@startTime datetime,
@aa int
)
as
begin
declare @SQL varchar(1000)
set @SQL='select * from Customer where ApplyTime>='
if @aa<>0
begin
set @SQL=@SQL+@startTime
end
exec sp_executesql @SQL
END
return
哪位大G帮我看看是咋回事呀.老说字符串转日期类型出错.明明@startTime就是日期类型呀.
...全文
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ws_hgo 2008-09-23
CREATE PROCEDURE test
(
@startTime datetime,
@aa int
)
as
begin
declare @SQL varchar(1000)
set @SQL='select * from Customer where ApplyTime> ='
if @aa <> 0
begin
set @SQL=@SQL+''''+@startTime+'''' ----加引号
end
exec sp_executesql @SQL
END
return hui_hui_2007 2007-12-08
1.你的参数是日期型,你传的实参也必须是日期型.
2.存贮过程中,必须将日期型参数转成字符串型才能与sql语句相连接.
2.存贮过程中,必须将日期型参数转成字符串型才能与sql语句相连接.
hui_hui_2007 2007-12-08
我的代码已经测试过了:
--创建
create proc ghtest
@starttime datetime,
@aa int
as
declare @sql varchar(1000)
set @sql='select * from employee where hire_date >= '
if @aa <> 0
begin
set @sql=@sql+''''+convert(varchar(10),@starttime ,120)+''''
print @sql
exec (@sql)
end
--调用
declare @t datetime
set @t=getdate()
exec ghtest @T,2
fa_ge 2007-12-08
alter PROCEDURE #test
(
@startTime datetime,
@aa int
)
as
begin
declare @SQL varchar(1000)
set @SQL='select * from pubs..employee where hire_date>='
if @aa <> 0
begin
set @SQL=@SQL+convert(varchar(10),@startTime ,120)
exec (@SQL)
end
endwangxuelid 2007-12-08
@statement' 为 'ntext/nchar/nvarchar' 类型。"...
---
declare statement nvarchar(1000)//这样就OK
---
declare statement nvarchar(1000)//这样就OK
wangxuelid 2007-12-08
学习，，
lyf_1688 2007-12-08
以上两位大G.你们提示的方法我之前都用过.全部都报错.一个报跟我同样的错.一个报"过程需要参数 '@statement' 为 'ntext/nchar/nvarchar' 类型。"......
中国风 2007-12-07
--改
Declare @SaleNumSum int
exec('Select ['+ @SaleNumSum +'] = sum(SaleNum) from [200608] where StoreID = 24')
--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
--------------------------------------------------------------------------------
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 中国风 2007-12-07
CREATE PROCEDURE test
(
@startTime datetime,
@aa int
)
as
begin
declare @SQL varchar(1000)
set @SQL='select * from Customer where ApplyTime> ='
if @aa <> 0
begin
set @SQL=@SQL+''''+@startTime+'''' ----加引号
end
exec sp_executesql @SQL
END
return -狙击手- 2007-12-07
CREATE PROCEDURE test
(
@startTime datetime,
@aa int
)
as
begin
declare @SQL varchar(1000)
set @SQL='select * from Customer where ApplyTime> ='
if @aa <> 0
begin
set @SQL=@SQL+''''+cast(@startTime as varchar) + ''''
end
exec sp_executesql @SQL
END
return
(
@startTime datetime,
@aa int
)
as
begin
declare @SQL varchar(1000)
set @SQL='select * from Customer where ApplyTime> ='
if @aa <> 0
begin
set @SQL=@SQL+''''+cast(@startTime as varchar) + ''''
end
exec sp_executesql @SQL
END
return