java的课后题答案，欢迎需要的前来下再载，具体的哪题都有标注，铁道出版社的书，大学java、-java answer questions after-school, welcomed the need to come under the re-set, the specific questions which are marked, Railway Publishing House of the book, the University of java,
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001573s ]
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:0.077320s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.000996s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001242s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001052s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003104s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000900s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.004164s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.016109s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001211s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 47394 [ RunTime:0.021267s ]
