[转]mysql存储过程学习总结
1.基本语法：call sp_name()
create procedure 存储过程名字()
(
[in|out|inout] 参数 datatype
)
begin
MySQL 语句;
end;
MySQL 存储过程中的变量，不需要在变量名字前加“@”，虽然 MySQL 客户端用户变量要加个“@”。
drop procedure sp_name//
1.区块定义，常用
begin
......
end;
也可以给区块起别名，如：
lable:begin
...........
end lable;
可以用leave lable;跳出区块，执行区块以后的代码
2.条件语句
if 条件 then
statement
else
statement
end if;
3.循环语句
(1).while循环
[label:] WHILE expression DO
statements
END WHILE [label] ;
(2).loop循环
[label:] LOOP
statements
END LOOP [label];
(3).repeat until循环
[label:] REPEAT
statements
UNTIL expression
END REPEAT [label] ;
1.show procedure status
显示数据库中所有存储的存储过程基本信息，包括所属数据库，存储过程名称，创建时间等
2.show create procedure sp_name
显示某一个存储过程的详细信息
附
drop procedure if exists pr_statis_rows;create procedure pr_statis_rows( db1 varchar(50), db2 varchar(50) ) begin DECLARE done INT DEFAULT 0;declare tempTableName varchar(50);declare stmt varchar(2000); DECLARE cur CURSOR FOR select table_name from INFORMATION_SCHEMA.TABLES where table_type='BASE TABLE' and table_schema=db1;DECLARE CONTINUE HANDLER FOR SQLSTATE '02000' SET done = 1;create TEMPORARY table IF NOT EXISTS ecard_row (table_name varchar(50), rows_ int, table_name2 varchar(50), rows_2 int); -- 打开/* select db1; */# 打印db1 OPEN cur; REPEAT FETCH cur INTO tempTableName; if tempTableName<>'ecard_row' then IF NOT done THEN set @c1=0; set @c2=0; set @sql = concat('select count(*) from ', db1 ,'.', tempTableName, ' into @c1'); set @sql2 = concat('select count(*) from ', db2 ,'.', tempTableName, ' into @c2'); prepare stmt from @sql; execute stmt; prepare stmt from @sql2; execute stmt; Insert ecard_row values (tempTableName, @c1, tempTableName, @c2); END IF; end if; UNTIL done END REPEAT; CLOSE cur;# 不能有return end; delete from ecard.ecard_row;# 不能省略参数call ecard.pr_statis_rows('aa','bb');select * from ecard.ecard_rowshow procedure status