The DB2 9.5 optimizer USES both type of indexes to optimize the queries and help selecting the best plan for query execution.

DB 2 9.5优化器使用两种类型的索引来优化查询，并帮助选择最佳的查询执行计划。

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Make sure appropriate indexes are used to minimize the rows that have to be fetched internally when selecting and joining tables.

请确保使用合适的索引，从而在选择和连接(join)表时，将必须在内部访存的行数减到最少。

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The Indexes view allows you to create indexes for the table by selecting from the list of columns defined for the table.

Indexes 视图允许通过从为表定义的列列表中作出选择来创建索引。

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