Oracle Database SQL 12c 1z0-071 Exam Practice Test 4

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Question : 55 of 57

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Which two are true about scalar subquery expressions? (Choose two.)

They can return at most one row.
You can use them as a default value for a column.
You cannot correlate them with a table in the parent statement.
You must enclose them in parentheses.
They can return two columns.

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