主要介绍了如何使用SQL语言编写高效简洁的数据库编程语句，提高数据库编程思想-Introduces how to use the SQL language simple and efficient database programming language, database programming to improve thinking
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001132s ]
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:0.061731s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001468s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001570s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001465s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.004020s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001122s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.004630s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015609s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001186s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 300962 [ RunTime:0.021457s ]
