mysql删除字段的方法总结_MySQL

DELIMITER $$<br><br>DROP PROCEDURE IF EXISTS `test`.`p_drop_uuid_uuname`$$<br><br>CREATE DEFINER=`root`@`%` PROCEDURE `p_drop_uu`()<br>BEGIN<br>    declare _db_name char(30);<br>    declare _tb_name char(30);<br>    declare _col_name char(30);<br>    declare no_more_row tinyint(1);<br>    <br>    declare cur_uuid cursor for <br>        select TABLE_SCHEMA,TABLE_NAME,COLUMN_NAME <br>            from information_schema.COLUMNS <br>                where COLUMN_NAME='uu';<br>    declare continue handler for not found set no_more_row=1;<br>    set no_more_row=0; -- 判断是否结束的标志位<br>    open cur_uuid;<br>        repeat <br>            fetch cur_uuid into _db_name,_tb_name,_col_name;-- 取记录<br>            -- select _db_name,_tb_name,_col_name;<br>            set @_dt = concat("alter table ", _db_name,".", _tb_name, " drop column uu");<br>            -- 在存储过程中，想把一个变量当作SQL执行，只有用prepare;<br>            prepare s1 from @_dt;<br>            execute s1;<br>            deallocate prepare s1;<br>            until no_more_row<br>        end repeat;<br>    close cur_uuid;<br>    END$$