A typical parameterized query USES these parameters instead of literal values, so that WHERE clause conditions can be changed at run time.
典型的参数化查询使用这些参数来代替文字值，因此where子句条件可以在运行时更改。
A parameterized class lets you base a recordset query on information obtained or calculated at run time.
参数化类使您可以根据运行时获取或计算的信息创建记录集查询。
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