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sql语句学习

#创建存储过程delimiter //drop procedure if exists looppc; create procedure looppc(in mmm CHAR(120)) begin declare i int; #定义变量set i = 0; #设置变量的值#循环条件 while i<( SELECT (length(zjxx_exampeople.se

delimiter //drop procedure if exists looppc; create procedure looppc() begin declare i int;declare m1 varchar(1000);SET @m1 = "SELECT * FROM `zjxx_exampeople` WHERE 1=1 "; prepare stm

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