IF EXISTS(SELECT * FROM sysobjects WHERE name = 'proc_createStudentDb')
DROP PROCEDURE proc_createStudentDb
GO
CREATE PROC proc_createStudentDb
@dbpath varchar(100),--输入参数,数据路径
@dbName varchar(100)--输入参数,数据库名
ASexec('
CREATE DATABASE student
ON PRIMARY
(
FILENAME = '''+@dbpath+'\stu_DB.mdf'',
NAME = '''+@dbName+''',
SIZE = 5MB
)
LOG ON
(
FILENAME = '''+@dbpath+'\stu_LOG.ldf'',
NAME = '''+@dbName+'Log'',
SIZE = 3MB
)
')
GOEXEC proc_createStudentDb 'c:\db','stu'
DROP PROCEDURE proc_createStudentDb
GO
CREATE PROC proc_createStudentDb
@dbpath varchar(100),--输入参数,数据路径
@dbName varchar(100)--输入参数,数据库名
ASexec('
CREATE DATABASE student
ON PRIMARY
(
FILENAME = '''+@dbpath+'\stu_DB.mdf'',
NAME = '''+@dbName+''',
SIZE = 5MB
)
LOG ON
(
FILENAME = '''+@dbpath+'\stu_LOG.ldf'',
NAME = '''+@dbName+'Log'',
SIZE = 3MB
)
')
GOEXEC proc_createStudentDb 'c:\db','stu'
--以下为在存储过程中备份数据库sqlserver 2000下测试成功。
sp_addumpdevice 'disk','abc','c:\a.bat'
backup database pubs to abc with name='sdf'
CREATE PROCEDURE BackupDatabase
(
@ToBackupDatabaseName nvarchar(50),
@ToBackupDisk nvarchar(500),
@ToBackupName nvarchar(50),
@IsBackuped bit OUTPUT
)
AS
BEGIN
Declare @bakstr varchar(300)
set @bakstr='BACKUP DATABASE ' + @ToBackupDatabaseName+' TO '+@ToBackupDisk+ ' WITH NAME = '''+@ToBackupName+''''
exec(@bakstr)
--print @bakstr
SET @IsBackuped =1
if @@error<>0
begin
SET @IsBackuped =0
end
end--调用
declare @v bit
exec BackupDatabase 'pubs','abc','as',@v outputdrop proc BackupDatabase
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