1楼：ALTER TABLE `f_threads`
ADD COLUMN `cid`tinyint(3) UNSIGNED NOT NULL DEFAULT 0 COMMENT ..

2楼：update f_posts_re_18 set to_id=0 where to_id is NULL;
ALTER TABLE `f_posts_re_18`
..

3楼：ALTER TABLE `f_threads`
ADD INDEX `reply_num` (`reply_num`) USING BTREE,
ADD INDEX ..

4楼：{{--{{htmlentities($data['message'])}}--}}{!! nl2br(\App\Handlers\myfun::regface($ ..

5楼：UPDATE a t1,b t2
SET t1.字段名=t2.字段名
WHERE t1.字段名=t2.字段名

6楼：update mm_fyinfo a   set re2=(select b.pname from oy_district b  where a.disid=b ..

7楼：UPDATE f_threads_collect set f_threads_collect.fid=(select fid where f_threads where f_thr ..

8楼：update f_threads set fid=0 where fid is null;
SELECT * FROM `f_threads`;
UPDATE f_ ..