mysql数据库下通用的行转列的存储过程...

网上搜到的，试过了，很好用。

DELIMITER $$ DROP PROCEDURE IF EXISTS `test`.`sp_row_column_wrap`$$ CREATE DEFINER=`root`@`localhost` PROCEDURE `sp_row_column_wrap`(IN $schema_name varchar(64), IN $table_name varchar(64)) BEGIN declare cnt int(11); declare $table_rows int(11); declare i int(11); declare j int(11); declare s int(11); declare str varchar(255); select count(1) from information_schema.columns where table_schema=$schema_name and table_name=$table_name into cnt; select table_rows from information_schema.tables where table_schema = $schema_name and table_name=$table_name into $table_rows; drop table if exists test.temp; create table if not exists test.temp (`1` varchar(255) not null); set i = 0; loop1:loop if i = $table_rows-1 then leave loop1; end if; set @stmt1 = concat('alter table test.temp add `',i+2,'` varchar(255) not null'); prepare s1 from @stmt1; execute s1; deallocate prepare s1; set i = i + 1; end loop loop1; set s = 0; loop2:loop if s=cnt then leave loop2; end if; set @stmt2 = concat('select column_name from information_schema.columns where table_schema="',$schema_name, '" and table_name="',$table_name,'" limit ',s,',1 into @temp;'); prepare s2 from @stmt2; execute s2; deallocate prepare s2; set j=0; set str = ' select '; loop3:loop if j = $table_rows then leave loop3; end if; set @stmt3 = concat('select ',@temp,' from ',$schema_name,'.',$table_name,' limit ',j,',1 into @temp2;'); prepare s3 from @stmt3; execute s3; set str = concat(str,'"',@temp2,'"',','); deallocate prepare s3; set j = j+1; end loop loop3; set str = left(str,length(str)-1); set @stmt4 = concat('insert into test.temp',str,';'); prepare s4 from @stmt4; execute s4; deallocate prepare s4; set s=s+1; end loop loop2; END$$ DELIMITER ;

参考资源：

http://www.javaeye.com/topic/134703

http://www.ajaxstu.com/MySQLshujuku/233482.html