primary key index发音

意思翻译

主键索引

相似词语短语

primary key───主（关）键（字）；主关键字，[计]主键标

concatenated primary key───串联主键

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

primary───adj.主要的；初级的；基本的；n.原色；最主要者

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

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 colors───红、黄、蓝三原色；n.红，黄，蓝三原色

yucang primary───初级玉仓

evenness index───均匀性指数

双语使用场景

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。

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。

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。

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。

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。

英语使用场景

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.

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