BULK COLLECT is not a statement on its own, but an optional clause that can be applied to SELECT INTO and FETCH statements.
BULKCOLLECT自身不是语句，而是可用于SELECTINTO和fetch语句的可选子句。
Optional clause to be used only where appropriate.
只有在适当的情况下才使用选择条款。
Optional clause to be used only where appropriate.
只有在适当的情况下才使用选择条款。
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