采用链式存储结构设计广义表,实现以下操作:创建广义表,取广义表的表头元素和表尾元素 求广义表的深度-Chain store use of the structural design of the generalized form, realize the following: create a generalized form, check the generalized table header elements and table elements for the end of the depth of the generalized form
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.002015s ]
SELECT `a`.`aid`,`a`.`title`,`a`.`create_time`,`m`.`username` FROM `jrk_downrecords` `a` INNER JOIN `jrk_member` `m` ON `a`.`uid`=`m`.`id` WHERE `a`.`status` = 1 GROUP BY `a`.`aid` ORDER BY `a`.`create_time` DESC LIMIT 10 [ RunTime:0.086712s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.002702s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001943s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.002201s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003631s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.002031s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003508s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014707s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.002304s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 198788 [ RunTime:0.001148s ]
