《PowerBuilder Win32 API函数调用参考手册》一书对应的“PowerBuilder API 浏览器”软件，包含注册说明，可以查询api函数和结构申明，常量查询，方便实用
先做一个数据库附件，再用Access数据库通用管理系统 9.0工具打开，否则打开“PowerBuilder API 浏览器”软件时提示无法访问数据库需要Access数据库通用管理系统 9.0工具
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.002086s ]
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:0.144046s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001677s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001870s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001387s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.005220s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001455s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.006442s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015474s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001161s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 490764 [ RunTime:0.154333s ]
