IF/THEN/ELSE 逻辑是搞清楚如何使用 WHERE 子句谓词的良好基础，因此在 DB2 地址空间中行能够被快速拒绝。

IF/THEN/ELSE logic is fertile ground for figuring out how to use WHERE clause predicates so rows can be rejected sooner in DB2's address space.

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如果您提供的地址或联络电话不正确，并导致包裹被拒绝，本店将不负责重新发送给您。

In the case that the parcel is return to us due to incorrect address provided by you, we will not take the responsibility to resend the parcel.

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