因此，项目计划应该包含数据库优化活动的时间和资源。
Therefore, the project plan should include the necessary time and resources for database specific tuning activities.
最优数据库性能还需要数据库优化器很好地发挥作用。
Optimal database performance requires the database optimizer to do its job well.
表之间的关系提供了Teradata数据库优化器的输入值。
Relationships between tables provide valuable input to the Teradata database optimizer.
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