一个很有用的vhdl实用教程，很适合初学者学习，介绍了vhdl的一些基本概念，还有一些经典的实例。-A useful practical VHDL Tutorial, it is suitable for beginners to learn, introduced some basic concepts of VHDL, there are some classic examples.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001302s ]
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:0.090002s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001237s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001902s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001304s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003600s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001113s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.004807s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015338s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001476s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 127242 [ RunTime:0.001398s ]
