数模转换器和模数转换器在单片机系统中的应用：AD转换器和DA转换器在MCS-51系列单片机系统中的应用-DAC and ADC in Single Chip System: AD converters and DA converters in the MCS-51 Series Single Chip System
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001126s ]
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:0.096834s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.000965s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001274s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001693s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.008315s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001357s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.007164s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.029095s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.000999s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 181329 [ RunTime:0.020604s ]
