本源码是从PB6.0中提取的SqlCe的源码，可以帮助理解嵌入数据库的基本机制，在此基础上也可以开发自己的嵌入数据库系统。
SQL Server CE 将 Microsoft SQL Server 的存储功能扩展到运行 Microsoft Windows CE .NET、Windows Powered Pocket PC 2002 或 Pocket PC 2000 的设备，同时为开发人员快速开发应用程序提供了一致的编程模型。
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001509s ]
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:0.097604s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001324s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001932s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001375s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003663s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001153s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003222s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014350s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001399s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 329013 [ RunTime:0.001384s ]
