创建mysql存储过程

delimiter //

CREATE PROCEDURE get_trees(in conditions varchar(2048), in fields varchar(2048) , in sort char(255), in start int, in num int)  
BEGIN 
        /* 获得10条记录 */  
        SET @sql = CONCAT(’SELECT ‘, fields, ‘ FROM Persons WHERE ‘, conditions, ‘ ORDER BY ‘, sort, ‘ LIMIT ‘, start, ‘,’, num);  
        PREPARE sqlstmt FROM @sql;  
        EXECUTE sqlstmt;  
        DEALLOCATE PREPARE sqlstmt;  
END//

delimiter ;