4. 建立一个有序的顺序表（10，30，35，50，56，100，120），用折半查找方法在此表中查找任一整数，若找到则输出此整数在表中的位置序号，否则输出Not found.-4. Establish an orderly sequence (10,30,35,50,56,100,120) using binary search method in this table as a whole you, if the output is found in this round table position serial number, Otherwise output Not found.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001036s ]
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:0.062130s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001042s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001191s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.000906s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003217s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000860s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003642s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014802s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001059s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 224572 [ RunTime:0.013532s ]
