SHOW FULL COLUMNS FROM `hgc_cert` [ RunTime:0.000926s ]
SELECT `id`,`name`,`url`,`type`,`image`,`level`,`intro`,`is_need`,`status`,`overratio`,`recom`,`keypoint`,`checkpoint`,`weigh`,`createtime`,`updatetime` FROM `hgc_cert` WHERE `id` = 2 AND `status` = 1 LIMIT 1 [ RunTime:0.000623s ]
SHOW FULL COLUMNS FROM `hgc_course` [ RunTime:0.000749s ]
SELECT `id`,`name`,`cert_id`,`period`,`teacher_name`,`intro`,`image`,`price`,`study_count`,`collect_count`,`status`,`nopass_reason`,`admin_id`,`createtime`,`updatetime` FROM `hgc_course` WHERE `status` = 1 AND `cert_id` = 2 ORDER BY `createtime` DESC [ RunTime:0.000596s ]
SHOW FULL COLUMNS FROM `hgc_user_cert` [ RunTime:0.000849s ]
SELECT * FROM `hgc_user_cert` WHERE `user_id` IS NULL AND `cert_id` = 2 LIMIT 1 [ RunTime:0.000553s ]
SHOW FULL COLUMNS FROM `hgc_study_history` [ RunTime:0.000647s ]
SELECT `course_id` FROM `hgc_study_history` WHERE `user_id` IS NULL LIMIT 1 [ RunTime:0.000419s ]
SELECT `id` FROM `hgc_course` WHERE `cert_id` = 2 LIMIT 1 [ RunTime:0.000422s ]
