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In which of the following situations should correlation names be used?()

发布日期:2022-07-16

In which of the following situations should correl...
A

A table referenced in the FROM clause has no indexed column.

B

The table referenced in the FROM clause has more than 200 columns.

C

Two or more tables in the FROM clause have identical column names.

D

The FROM clause contains two or more tables in the SELECT statement.

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