DELIMITER//CREATEPROCEDUREin_param(INp_inINT)BEGINSELECTp_in;SETp_in=2;SELECTP_in;END//DELIMITER;SET@p_in=1; CALLin_param(@p_in);+---+|p_in|+---+|1|+---++---+|P_in|+---+|2|+---+ SELECT@p_in;+---+|@p_in|+---+|1|+---+ 以上可以看出,p_in 在存储过程中被...
mysql>DELIMITER//--修改结束符mysql>CREATEPROCEDUREdemo_in_parameter(INp_inint)--定义带参数的存储过程->BEGIN->SELECTp_in;->SETp_in=2;->SELECTp_in;->END;->//mysql>DELIMITER ; 执行结果: mysql>SET@p_in=1; mysql>CALL demo_in_parameter(@p_in);+---+|p_in|+---+|1|+---++---...
CREATE PROCEDURE p1(IN parameter1 INT) BEGIN DECLARE variable1 INT; SET variable1 = parameter1 + 1; IF variable1 = 0 THEN INSERT INTO t VALUES (17); END IF; IF parameter1 = 0 THEN UPDATE t SET s1 = s1 + 1; ELSE UPDATE t SET s1 = s1 + 2; END IF; END; // DELIMITER ; ...
mmysql>delimiter//mysql>createprocedureout_param(outp_outint)->begin->selectp_out; ->setp_out=2; ->selectp_out; ->end-> // 3、inout输入参数 mysql>delimiter $$ mysql>createprocedureinout_param(inout p_inoutint)->begin->selectp_inout;->setp_inout=2;->selectp_inout;->end->$$ m...
1、in 输入参数 2、out输出参数 3、inout输入参数 三、变量 1. 变量定义 2. 变量赋值 3. 用户变量 四、注释 MySQL存储过程的调用 MySQL存储过程的查询 MySQL存储过程的修改 MySQL存储过程的删除 MySQL存储过程的控制语句 例子代码 MySQL 5.0 版本开始支持存储过程。 存储过程(Stored Procedure)是一种在数据库中...
1、in 输入参数 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>s...
MySQL存储过程(Stored Procedure)主要的知识点: 分隔符(delimiter) 变量(variable) 参数(parameters) 分隔符(DELIMITER) MySQL通过delimiter来区分不同的SQL语句(SQL Statement),默认的分隔符是;; 对于procedure,会有多条SQL Statement,且MySQL的每个statement都需要以分隔符结束; ...
SET @FirstVar=1, @SecondVar=2;一旦你给一个变量赋值，它将根据给定的值有一个类型。在前面的例子...
I've tried using this SQL query on an a Stored Procedure on this mode SET tyear = YEAR(CURDATE()); SET @tbl = CONCAT(DATE_FORMAT(CURRENT_TIMESTAMP(), '%Y%m%d%H'),'_',tyear); SET tablename = CONCAT('t_contents_',@tbl,''); SET @GetName = CONCAT(' SELECT GROUP_CONCAT(DIS...
instead of '@profileGroup'. I found that if I used 'profileGroup', when I referenced '@profileGroup' later in my procedure, the variable was null. When I used '@profileGroup' at line 10, the variable was set as expected. Does anyone have any insight into why I need to use the @...