matlab关于数据存取的技术总结，包括如何读取各种不同格式的数据到矩阵中-matlab summary about data access technologies, including how to read a variety of different formats of data to the matrix
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001109s ]
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:0.085375s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001068s ]
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SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001235s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003519s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000917s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003229s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014285s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001287s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 33729 [ RunTime:0.003251s ]
