则子句 meaning in English

then clause

If you think of creating a query like asking a question , the clauses are the way that you refine your question to get the best possible set of answers for you to work with
如果您将创建查询想像为提出问题，则子句就是您优化问题的方法，使您能够获得最佳的答案集。
If you think of creating a query as you do of asking a question , clauses are the way that you refine your question to obtain the best possible set of answers for you to work with
如果将创建一个查询看作是提出一个问题，则子句就是精炼问题以获得可供使用的最佳答案集的方式。