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    0. testÊý¾Ý¿â,userinfo Óû§ÐÅÏ¢±í ºÍ userinfolog Óû§ÐÅÏ¢ÈÕÖ¾±í
    1. ½¨Á¢Ò»¸öuserinfo±íÐÂÔö¼Ç¼ʱµÄ´¥·¢Æ÷,½«ÐÂÔöÈÕÖ¾¼ÓÈëµ½userinfolog
    2. ½¨Á¢Ò»¸öÏòuserinfo±íÐÂÔö¼Ç¼µÄ´æ´¢¹ý³Ì
    3. ¸ù¾Ýuserinfo±íµÄ³öÉúÈÕÆÚ×Ö¶Î,ÎÒÃǽ«½¨Á¢Ò»¸ö¼òµ¥ËãµÃÄêÁäµÄ×Ô¶¨Ò庯Êý
    4. ´´½¨Ò»¸öuserinfoµÄÊÓͼ,µ÷ÓÃÄêÁ亯Êý
    0.×¼±¸Ïà¹Ø±í
    mysql> use test;
    mysql> create table userinfo(userid int,username varchar(10),userbirthday date);
    mysql> create table userinfolog(logtime datetime,loginfo varchar(100));
    mysql> describe userinfo;
    1.´¥·¢Æ÷
    mysql> delimiter |
    mysql> create trigger beforeinsertuserinfo
        -> before insert on userinfo
        -> for each row begin
        ->   insert into userinfolog values(now(),CONCAT(new.userid,new.username));
        -> end;
        -> |
    mysql> delimiter ;
    mysql> show triggers;
    2.´æ´¢¹ý³Ì
    mysql> delimiter //
    mysql> create procedure spinsertuserinfo(puserid int,pusername varchar(10),puserbirthday date)
        -> begin
        ->  insert into userinfo values(puserid,pusername,puserbirthday);
        -> end;
        -> //
    mysql> show procedure status like 'spinsertuserinfo';
    mysql> call spinsertuserinfo(1,'zhangsan',current_date);
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A Practical Look at the MySQL Query Cache
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