http://datacharmer.blogspot.com/2005/10/sort-of-triggers-on-select.html Subject Views Written By Posted How to use a stored procedure in a select structure? 3019 jp w November 14, 2005 12:55AM Re: How to use a stored procedure in a select structure?
SELECTCOUNT(*)INTOvarNameFROMStudent;-- 变量 de 赋值(SELECT INTO) 2 SELECTvarNameAS'总人数';-- 变量 de 输出 END;-- 2执行段 - 结束 -- END $$ CALLprocedure_view_all_student; 2.2 仅含输入参数(IN)的存储过程 DROPPROCEDUREIFEXISTSprocedure_view_select_course_of_one_student;-- 查看 指定某...
mysql>delimiter$$mysql>createprocedurein_param(inp_inint)->begin->selectp_in; ->setp_in=2; ->selectP_in; ->end$$mysql>delimiter;mysql>set@p_in=1;mysql>callin_param(@p_in); +---+ |p_in| +---+ |1| +---+ +---+ |P_in| +---+ |2| +---+mysql>select@p_in; +-...
举例1:创建存储过程select_all_data(),查看 emps 表的所有数据 DELIMITER $CREATEPROCEDUREselect_all_data()BEGINSELECT*FROMemps;END$ DELIMITER ; 举例2:创建存储过程avg_employee_salary(),返回所有员工的平均工资 DELIMITER//CREATEPROCEDUREavg_employee_salary ()BEGINSELECTAVG(salary)ASavg_salaryFROMemps;END/...
mysql>create database db1;mysql>use db1;mysql>create tablePLAYERSasselect*fromTENNIS.PLAYERS;mysql>create tableMATCHESasselect*fromTENNIS.MATCHES; 示例:创建一个存储过程,删除给定球员参加的所有比赛 代码语言:javascript 代码运行次数:0 运行 AI代码解释 ...
DELIMITER$$CREATEPROCEDURECheckScoreINOUT(INOUTscoreDOUBLE)BEGINSETscore:=score*0.5;END$$DELIMITER; 4.3 CASE 语句 CASE语句是一种条件表达式,允许根据不同的条件选择不同的结果。它通常用于SELECT查询、UPDATE语句或存储过程中的条件判断。 语法: 代码语言:javascript ...
数据库视图是虚拟表或逻辑表,它被定义为具有连接的SQL SELECT查询语句。其本质是为常用的查询语句起个别名。用户使用时只需使用【名称】即可获取结果集,并可以将其当作表来使用。不是真正存在。视图存在数据库中。 数据库视图是动态的,因为它与物理模式无关。数据库系统将数据库视图存储为具有连接的SQL SELECT语句。
In the following section, you learn how to create, update and delete view objects in your MySQL database.Create a SQL View To create a new view object, you use the CREATE VIEW statement followed by the desired name of the object and the SELECT statement used for abstraction. Here, you ...
存储过程(Stored Procedure)是在大型数据库系统中,一组为了完成特定功能的SQL 语句集,存储在数据库中,经过第一次编译后调用时不需要再次编译,用户通过指定存储过程的名字并给出参数(如果该存储过程带有参数)来执行它。存储过程是数据库中的一个重要对象。
How to use a stored procedure in a select structure?Navigate: Previous Message• Next Message Options: Reply• Quote Subject Views Written By Posted How to use a stored procedure in a select structure? 3004 jp w November 14, 2005 12:55AM Re: How to use a stored procedure in a ...