很好的关于ＯＲＡＣＬＥ的调优的书
值得参考，现在贡献出来大家共享，
这是第３部分．-good on Oracle optimization book is worth considering, now contribute share, This is the first of three parts.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001287s ]
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:0.089011s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001280s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001898s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001209s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003563s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001034s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003175s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014530s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001313s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 252822 [ RunTime:0.001329s ]
