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primary key index是什么意思 primary key index的用法例句

primary key index(意思翻译)

主键索引


primary key index(相似词语短语)

1、primary colors───红、黄、蓝三原色;n.红,黄,蓝三原色

2、concatenated primary key───串联主键

3、evenness index───均匀性指数

4、multiple primary key defined───定义了多个主键

5、index───vi.做索引;vt.指出;编入索引中;n.指标;指数;索引;指针

6、primary key───主(关)键(字);主关键字,[计]主键标

7、yucang primary───初级玉仓

8、primary───adj.主要的;初级的;基本的;n.原色;最主要者

9、Key───n.钥匙;关键,密钥;(键盘乐器或电脑键盘的)键;调,声调,色调;答案;图例;扳手;销子,楔,栓;翼果;板条间首层灰泥;(篮球)罚球区;低岛,礁;adj.关键的,主要的;n.(Key)(美)基(人名);vt.键入,用键盘输入;用别针等固定;使与……符合或关联;使……与……共处,相安无事;用钥匙将汽车表面划坏;将(表面)弄粗糙;给(广告)加识别码;成为获得……的关键



primary key index(双语使用场景)

1、It queries your database, indexes each column in each row of the result, and ties each index entry to the row's primary key.───它将查询数据库,为结果的每行中的每列建立索引,并且将每个索引条目绑定到行的主键上。

2、To better illustrate the improvement in cardinality estimation, drop all the existing indexes on the EMPLOYEE table except the primary key index.───为了更好地解释说明基数估计值的提高,撤销除主键索引外的所有employee表上的现有索引。

3、The corresponding primary key index permits the retrieval of employee number 390 quickly .───通过对应的主键索引,可以快速地检索到雇员编号390。

4、Also, before setting up replication in DB2, you will want to ensure that every database table has a primary key or unique index.───此外,在DB 2中创建复制之前,您会希望保证每一个数据库表都具有一个主键或惟一索引。

5、If the row size is not fixed, every time it needs to do a seek, it has to consult the primary key index.───而如果字段不是定长的,那么,每一次要找下一条的话,需要程序找到主键。



primary key index(英语使用场景)

1、Although this lookup is done via the primary key index, it does take CPU cycles to do the search, and possibly I/O to read index page(s) into the buffer pool.

2、It also permits fast access to data when you use the primary key index in queries.


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