Since this query contains no value predicate to restrict either the books or the authors table, DB2 has to perform a table scan on either of the two tables to read all author IDs.
由于该查询没有包含用来限制books或authors表的值谓词，因此DB 2必须在两个表上执行表扫描，以便读取所有author ID。
There is also a table and a chair in my room. There are two bottles of ink, a desk lamp, a clock and many note books on the table.
房间里还有一个桌子和一个椅子，桌子上有两瓶墨水，一个台灯，一个钟表和许多笔记本。
To his right two books lay on the table and picks up one, blowing off the dust, revealing an elegantly engraved title: "the little match sister" in gold lettering.
在他右面，有两本书放在桌子上，他拿起一本，吹去上面的灰尘，封面上显示出精美地篆刻的烫金书名《卖火柴的小女孩》。
To his right two books lay on the table and picks up one, blowing off the dust, revealing an elegantly engraved title: "the little match sister" in gold lettering.
在他右面，有两本书放在桌子上，他拿起一本，吹去上面的灰尘，封面上显示出精美地篆刻的烫金书名《卖火柴的小女孩》。
应用推荐