-- select * from (SELECT nid from part where nid > 2) as A -- create view V1 AS -- create view V1 AS #创建视图 -- select man_to_woman.nid,man.name as mname,woman.name as wname from man_to_woman -- LEFT JOIN man ON man_to_woman.man_id = man.nid -- LEFT JOIN woman on man_to_woman.woman_id = woman.nid -- where man.name = 'duyanqi' delimiter \ #声明以\为语句结束符(默认;分号结束) drop PROCEDURE if EXISTS proc_p1 \ CREATE PROCEDURE proc_p1(in i1 INT)#生成存储过程,获取一个变量i1 BEGIN -- SELECT * FROM man; DECLARE d1 int;#声明变量 DECLARE d2 int DEFAULT 3; set d1 = i1 + d2; SELECT * FROM man_to_woman WHERE nid > d1; END \ delimiter ;#将默认的;更改回来 call proc_p1(1);#调用存储过程 #drop procedure proc_p1;#删除存储过程