Parameter estimation is a subject that is standard fare in the many books available on statistics. This book developes from basic to high level of estimation with simple and useful example
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.000927s ]
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:0.066390s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001400s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001830s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001405s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.004580s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001248s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.005608s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014315s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001153s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 495234 [ RunTime:0.017014s ]