据诺基亚的执行副总裁特罗·奥耶佩拉（Tero Ojanpera）表示，巨大的顾客基数是诺基亚的重要优势。

The huge customer base is a big advantage, according to Tero Ojanpera, an executive vice president at Nokia.

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COLCARDF(见图5中4)：列基数，表示评估的列中不同值的数目。

COLCARDF (see number 4 in Figure 5) : column cardinality, which denotes the estimated number of distinct values in the column.

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CARDF(见图5中1)：表基数，表示表中总行数。

CARDF (see number 1 in Figure 5) : table cardinality, which denotes the total number of rows in the table.

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