Now Postgres faces a dilemma. It can use the B-tree index on timestamp to get rows in the right timestamp order, but it has no way to skip directly to “US” rows. It must walk the index one entry at a time, checking the country for each row and discarding most of them. In the worst case, this means walking the entire index. Or it can scan rows that match severity
巴林内政部3月8日在社交媒体上发文说，伊朗无人机袭击了巴林一座海水淡化厂。。新收录的资料是该领域的重要参考
Touted as "a girls' weekend like no other", Meghan will speak at a gala dinner, with VIP ticket holders offered front-row seats and a group photo with the duchess.，详情可参考新收录的资料
这些案例背后其实指向的是同一件事：
Ньюкасл Юнайтед