mysql 存储过程
1.创建存储过程 Createprocedureprocedure_namebegin---end; 2.创建函数 Createfunctionfunction_name 3.定义存储过程和函数的参数 Parameter_nametype; 如: nameint; 4.关于存储过程和函数的表达式 1)声明变量 Declarevar_nametype 【 defaultvalue 】 2)
1. 创建存储过程
Create procedure procedure_name begin --- end ;
2. 创建函数
Create function function_name
3. 定义存储过程 和 函数 的参数
Parameter_name type ;
如: name int ;
4. 关于存储过程 和函数的表达式
1) 声明变量
Declare var_name type 【 default value 】
2) 赋值变量
Set var_name = expr
3) 使用 select .... Into 实现赋值
Select filed_name into var_name from table_name where condition(条件);
4) 定义条件
Declare condition_name condition for condition_value ;
5. 删除存储过程 和 函数
Drop procedure procedure_name ;
Drop function function_name ;
6. 修改 存储过程 和函数
Alter procedure procedure_name [ 修改 内容语句 ]
Alter function function_name [ 修改 语句 ]
7.使用流程语句
If search_condition then statement_list
. . .
End if
Case case_value
When when_value then statement_list
...
Else statement_list
End case
8.循环控制语句
1) [ begin_label : ] loop
Statement_list
End loop [ end_loop ]
Leave begin_label //
2) [ begin_label : ] while searcg_condition do
Statement_list
End while [ end lable ]
3) [ begin_label : ] repeat search_condition do
Statement_list
End repeat [ end_list ]
9.查看 存储过程 和 函数
1)通过 show status 语句查看函数和存储过程
Show procedure status [ like ‘pattern’ ]
Show function stutus [ like ‘pattern’ ]
2)通过 系统表 information_schema.routines 查看函数和存储过程
Use information_schema
Select * from routines //
3)通过 show create 语句查看函数和存储过程]

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