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This surrogate column can be designated the primary key column.
可以将该代理列指定为主键列。
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A primary key column is identified by a primary key symbol in its row selector.
主键列由其行选择器中的主键符号标识。
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A primary key column is identified by a primary key symbol in its row selector.
主键列由其行选择器中的主键符号标识。
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