...CHEMA 设置(Dimitri Fontaine) CREATE/ALTER TABLE 允许在ALTER TABLE 时将主键或唯一约束设定到既有的唯 一索引(Gurjeet Singh) 允许在ALTER TABLE 时添加未验证的外键(Simon Riggs) ALTER TABLE ..
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表的主键和所有惟一索引都必须是相关分区键的超集。
The primary key and any unique index of the table must be a superset of the associated partitioning key.
索引idx6还是与查询6中的谓词相匹配的惟一索引。
Index idx6 is also the only index that matches the predicate in query 6.
显然这并不像使用一个单一索引的有序列表那样简单,但是它可以做到。
Obviously, this is not as trivial as using a single index's ordered list, but it can be done.
Again I should have said first, index 0, the first one. I can similarly go in and say I'd like all the things between index 2 and index 4. And again, remember what a b c that does. Index 2 says start a 0. 1, 2. So a, b, c.
我还是要说一遍,索引为0的元素,是第一个元素,我可以要求返回索引,2和4之前的所有元素,请记住2,是从0开始的,那么0,1,2对应的是。
It's really a technology initiative that's aimed to index the "dark" web or the hidden web, because according to computer scientists, right now the conditional search engines only index about 1% of the information on the Internet.
这是一项,致力于将暗网,或隐藏网页纳入索引的技术创新,根据计算机科学家的统计,条件式的搜索引擎只将,互联网上1%的信息纳入了索引。
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