Data type of primary key columns, foreign key columns, and columns used on indexes.

主键列、外键列和索引上使用的列的数据类型。

youdao

After an XMLToSQL is created, primary key columns and target columns are set. The following sample class illustrates these steps.

XMLToSQL创建完后，就可以设置主键列和目标列了。

youdao

Inter-table relationships, primary key columns, and other information about the target data is specified through the metadata object as well.

表间关系、主键列和其他有关目标数据的信息也是通过元数据对象指定的。

youdao

The column family is organized by customer ID (primary key), you have columns for first name, last name, address, and all the normal customer information, plus as many rows as are needed for each purchase.

FORBES: What You Need to Know About NoSQL Databases