编译器 用C语言对下述文法和单词表定义的语言设计编制一个编译器-Compiler used in C language on the following definition of grammar and word list designed to prepare a language compiler
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001446s ]
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:0.148010s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001986s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.003413s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.002086s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.006405s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001464s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003295s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014797s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001408s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 231464 [ RunTime:0.001497s ]
