SQL之PROCEDURE（存储过程）

先来看一小段代码

 create procedure pr_bank(@bank_id int)
 as
 BEGIN
     select *from bank
     where bank_ID = @bank_id
     if (select count(*) from account where bank_id=@bank_id)=0
          delete  from bank where bank_ID=@bank_id
     if (select sum(account_balance) from account where bank_id=@bank_id group by bank_id)<1000000
         insert into account(bank_id) values(@bank_id)
 END

一般分为十种情况，每种语法各不相同：

1、 创建语法

 create proc | procedure pro_name
    [{@参数数据类型} [=默认值] [output],
     {@参数数据类型} [=默认值] [output],
     ....
    ]
 as
    SQL_statements

2、 创建不带参数存储过程

 --创建存储过程
 if (exists (select * from sys.objects where name = 'proc_get_student'))
     drop proc proc_get_student
 go
 create proc proc_get_student
 as
     select * from student;

 --调用、执行存储过程
 exec proc_get_student;

3、 修改存储过程

--修改存储过程
alter proc proc_get_student
as
select * from student;

4、 带参存储过程

 --带参存储过程
 if (object_id('proc_find_stu', 'P') is not null)
     drop proc proc_find_stu
 go
 create proc proc_find_stu(@startId int, @endId int)
 as
     select * from student where id between @startId and @endId
 go

 exec proc_find_stu 2, 4;

5、 带通配符参数存储过程

 --带通配符参数存储过程
 if (object_id('proc_findStudentByName', 'P') is not null)
     drop proc proc_findStudentByName
 go
 create proc proc_findStudentByName(@name varchar(20) = '%j%', @nextName varchar(20) = '%')
 as
     select * from student where name like @name and name like @nextName;
 go

 exec proc_findStudentByName;
 exec proc_findStudentByName '%o%', 't%';

6、 带输出参数存储过程

 if (object_id('proc_getStudentRecord', 'P') is not null)
     drop proc proc_getStudentRecord
 go
 create proc proc_getStudentRecord(
     @id int, --默认输入参数
     @name varchar(20) out, --输出参数
     @age varchar(20) output--输入输出参数
 )
 as
     select @name = name, @age = age  from student where id = @id and sex = @age;
 go

 --
 declare @id int,
         @name varchar(20),
         @temp varchar(20);
 set @id = 7;
 set @temp = 1;
 exec proc_getStudentRecord @id, @name out, @temp output;
 select @name, @temp;
 print @name + '#' + @temp;

7、 不缓存存储过程

 --WITH RECOMPILE 不缓存
 if (object_id('proc_temp', 'P') is not null)
     drop proc proc_temp
 go
 create proc proc_temp
 with recompile
 as
     select * from student;
 go

 exec proc_temp;

8、 加密存储过程

 --加密WITH ENCRYPTION
 if (object_id('proc_temp_encryption', 'P') is not null)
     drop proc proc_temp_encryption
 go
 create proc proc_temp_encryption
 with encryption
 as
     select * from student;
 go

 exec proc_temp_encryption;
 exec sp_helptext 'proc_temp';
 exec sp_helptext 'proc_temp_encryption';

9、 带游标参数存储过程

 if (object_id('proc_cursor', 'P') is not null)
     drop proc proc_cursor
 go
 create proc proc_cursor
     @cur cursor varying output
 as
     set @cur = cursor forward_only static for
     select id, name, age from student;
     open @cur;
 go
 --调用
 declare @exec_cur cursor;
 declare @id int,
         @name varchar(20),
         @age int;
 exec proc_cursor @cur = @exec_cur output;--调用存储过程
 fetch next from @exec_cur into @id, @name, @age;
 while (@@fetch_status = 0)
 begin
     fetch next from @exec_cur into @id, @name, @age;
     print 'id: ' + convert(varchar, @id) + ', name: ' + @name + ', age: ' + convert(char, @age);
 end
 close @exec_cur;
 deallocate @exec_cur;--删除游标

10、 分页存储过程

 ---存储过程、row_number完成分页
 if (object_id('pro_page', 'P') is not null)
     drop proc proc_cursor
 go
 create proc pro_page
     @startIndex int,
     @endIndex int
 as
     select count(*) from product
 ;
     select * from (
         select row_number() over(order by pid) as rowId, * from product
     ) temp
     where temp.rowId between @startIndex and @endIndex
 go
 --drop proc pro_page
 exec pro_page 1, 4
 --
 --分页存储过程
 if (object_id('pro_page', 'P') is not null)
     drop proc pro_stu
 go
 create procedure pro_stu(
     @pageIndex int,
     @pageSize int
 )
 as
     declare @startRow int, @endRow int
     set @startRow = (@pageIndex - 1) * @pageSize +1
     set @endRow = @startRow + @pageSize -1
     select * from (
         select *, row_number() over (order by id asc) as number from student
     ) t
     where t.number between @startRow and @endRow;

 exec pro_stu 2, 2;

作者：耑新新，发布于  博客园

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