vc环境下，对超市存包系统进行简单模拟，对vc初学者了解vc程序开发很有帮助。-vc environment, on the supermarket kept simple package system simulation, vc beginners to understand the development vc helpful.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.002549s ]
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:0.096646s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.002278s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001907s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.002102s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003638s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.002197s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003812s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014951s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.009726s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 175420 [ RunTime:0.001103s ]
