delimiter // create procedure caozuo() begin select * from t1;# 查询t1 select * from t2; # 查询t2 insert into t2 values(1,'市场部',5000); #插入数据 delete from t1 where id=5; #删除数据 end // delimiter ; 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 调用存储过程 语法:call 过程名...
mysql> create procedure addStudent(nickname varchar(50),pwd varchar(50),email varchar(50),address varchar(50)) -> begin -> insert into student(nickname,password,email,address)values(nickname,pwd,email,address);end; 执行之后,通过show procedure status 命令查看存储过程是否创建成功: mysql> show proc...
在存储过程中,我们可以使用DECLARE语句声明一个变量,然后将警告信息赋值给这个变量,以便后续处理。 DELIMITER//CREATEPROCEDUREexample_procedure()BEGINDECLAREwarning_messageVARCHAR(255);-- 执行SQL语句INSERTINTOtable_nameVALUES(value);-- 获取警告信息SHOWWARNINGS;-- 将警告信息赋值给变量SETwarning_message=(SELECTme...
and may include many SQL statements SQL statement set. The following definition for a stored procedure process: create procedure proc_name (in parameter integer) begindeclare variable varchar (20); if parameter = 1 thenset variable = 'MySQL'; elseset variable = 'PHP'; end if; insert into ...
建立存储过程IN_example: delimiter // drop procedure if exists IN_example// create procedure IN_example (IN input_number int) begin set input_number = 2; select input_number; end// 把用户变量@input_number的初始值设为3: set @input_number = 3// ...
MODIFIES SQL DATA means routine contains statements that may write data (for example, INSERT or DELETE). SQL SECURITY { DEFINER | INVOKER } SQL SECURITY, can be defined as either SQL SECURITY DEFINER or SQL SECURITY INVOKER to specify the security context; that is, whether the routine executes...
存储过程(Stored Procedure)是一组为了完成特定功能的SQL语句集,经编译后存储在数据库中,用户通过指定存储过程的名字并给定参数(如果该存储过程带有参数)来调用执行它。 优点 (1) 存储过程增强了SQL语言的功能和灵活性。存储过程可以用流控制语句编写,有很强的灵活性,可以完成复杂的判断和较复杂的运算。
insert和delete也需要合并 等等 实践中如何优化MySQL 我当时是按以下四条依次回答的,他们四条从效果上第一条影响最大,后面越来越小。 ① SQL语句及索引的优化 ② 数据库表结构的优化 ③ 系统配置的优化 ④ 硬件的优化 sql注入的主要特点 变种极多,攻击简单,危害极大 ...
mysql>DELIMITER//mysql>CREATEPROCEDUREp1()BEGINDECLAREfantaINTDEFAULT55;DROPTABLEt2;LOOPINSERTINTOt3VALUES(fanta);ENDLOOP;END//Query OK, 0 rows affected (0.01 sec)mysql>SHOWPROCEDURECODEp1//+---+---+|Pos|Instruction|+---+---+|0|set fanta@0 55||1|stmt 9 "DROP TABLE t2"||2|stmt 5...
I am having trouble writing a stored proc that will return the value of a neweley created record's auto increment value. Here is the stored proc: CREATE PROCEDURE `usp_Insertproperty` (IN Created_Date datetime, IN House_Name varchar(50), ...