optional clause

BULK COLLECT is not a statement on its own, but an optional clause that can be applied to SELECT INTO and FETCH statements.

BULK COLLECT自身不是语句，而是可用于SELECT INTO和FETCH语句的可选子句。

from is an optional clause that provides the uri of the dataset to use.

作为前缀。FROM是一个可选的子句，它提供了将要使用的数据集的URI。

since db2 9. 5 you can add the optional clause reject invalid values to your xml index definition.

从DB29.5往后，您就可以向XML索引定义添加可选的REJECTINVALIDVALUES子句。

use of this optional clause is required only when the compatibility level is 65 or lower.

仅当兼容级别等于或低于65时，才需要使用此可选子句。

optional clause to be used only where appropriate.

只有在适当的情况下才使用选择条款。