For an index key column that is of variable length.

具有可变长度的索引键列。

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The tables are joined over a common key column (ID).

这两个表通过一个共同的键列(ID)进行联结。

youdao

We selected TITLE as the key column for convenience.

为了简便，我们选择TITLE作为主键列。

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This is the third column on key demographics to follow in the Presidential race this year.

FORBES: ZOGBY: Demographics and 2012: Income, Education, Class

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

Many Democrats blame Nader's Green Party candidacy in 2000 for siphoning enough votes away from Al Gore to swing key states, including Florida, into President George W. Bush's column.

CNN: Court OKs Nader on Florida ballot