Logical records: The columns in a table are accessed through column names, not record offsets.

逻辑记录：表中的列是通过列名而非记录偏移量来访问的。

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Logical records: The columns in a table are accessed through column names, not record offsets.

逻辑记录：表中的列是通过列名而非记录偏移量来访问的。

youdao