USE pubs
GOIF ( EXISTS ( SELECT * FROM sysobjects WHERE name = 'CompanySurvey' and type = 'P' ) )
DROP PROCEDURE CompanySurvey
GO
CREATE PROCEDURE CompanySurvey
WITH ENCRYPTION
AS
IF ( EXISTS ( SELECT * FROM tempdb.dbo.sysobjects WHERE name = '##customeretvalue' ))
DROP TABLE ##customeretvalue select a.stock_code as 证券代码,
a.stock_name as 证券名称,
a.price as 最新价,
sum(a.amount) as 托管数量,
sum(a.etvalue) as 托管市值,
case
when a.exchange_type = '1' then '上海A股'
when a.exchange_type = '2' then '深圳A股'
when a.exchange_type = 'D' then '上海B股'
when a.exchange_type = 'H' then '深圳B股'
end 交易类别,
rtrim(b.dict_prompt) as 股票类别
into ##sumstocketvalue
from customeretvalue a, dictionary b
where (a.stock_type = b.subentry) and (dict_entry = 1206)
group by a.stock_code,
a.stock_name,
a.price,
b.dict_prompt,
a.exchange_type
order by a.stock_code
GO这里的表customeretvalue , dictionary 如何用变量代替,用参数传递进去???
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
EXEC('SELECT * FROM '+@TableName+'...')
CREATE PROCEDURE CompanySurvey
@customeretvalue VARCHAR(50),
@dictionary VARCHAR(50)
WITH ENCRYPTION
ASEXEC('
IF ( EXISTS ( SELECT * FROM tempdb.dbo.sysobjects WHERE name = ''##customeretvalue'' ))
DROP TABLE ##customeretvalue select a.stock_code as 证券代码,
a.stock_name as 证券名称,
a.price as 最新价,
sum(a.amount) as 托管数量,
sum(a.etvalue) as 托管市值,
case
when a.exchange_type = ''1'' then ''上海A股''
when a.exchange_type = ''2'' then ''深圳A股''
when a.exchange_type = ''D'' then ''上海B股''
when a.exchange_type = ''H'' then ''深圳B股''
end 交易类别,
rtrim(b.dict_prompt) as 股票类别
into ##sumstocketvalue
from '+@customeretvalue+' a, '+@dictionary+' b
where (a.stock_type = b.subentry) and (dict_entry = 1206)
group by a.stock_code,
a.stock_name,
a.price,
b.dict_prompt,
a.exchange_type
order by a.stock_code ')
GO