下面的程序显示含有位段的结构变量所占用的字节数量，以及结构变量在内存中的地址分配情况-following the procedure shown to contain spaces of the structure occupied by the variable number of bytes, and the structural variables in memory address distribution
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001676s ]
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:0.090596s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001178s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001355s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001258s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003420s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001017s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003841s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015519s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001259s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 220669 [ RunTime:0.012009s ]
