This query, although fairly simple in terms of the result set, is lengthy and unwieldy when you have to maintenance such a query.

 
  • 盡管就結果集而言此查詢(xún)相當簡(jiǎn)單,但是在必須維護這種查詢(xún)的情況下,它就顯得冗長(cháng)且難處理。
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