编写函数int index返回字符t在字条串s中出现的最左边的位置，如果在s中没有与t匹配的子串，不返回-1-function int index prepared to return to the characters not string"s note appeared in the leftmost position, If s and t is not matched substring, not to return-1
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001155s ]
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:0.082227s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001220s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001568s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001157s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003433s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000850s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003767s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015842s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001103s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 140427 [ RunTime:0.013580s ]
