设计、编制、调试一个典型的语法分析程序，实现对如下文法的递归子程序法分析，进一
步掌握常用的语法分析方法。-Design, preparation, testing a typical parser to realize the following grammar for a recursive subroutine Analysis, to further understand the syntax of commonly used analytical methods.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001295s ]
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:0.098752s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.000976s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001135s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.000969s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003103s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000816s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003823s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015302s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001093s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 264280 [ RunTime:0.087012s ]
