2002年底，陆军在战士项目施行办公室（Program Executive Office，PEO）下建立了疾速列装建议（Rapid Fielding Initiative，RFI）。
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执行办公室 PEO Soldier ; Program Executive Office ; PEO
中国工商银行办公室 General Office of the ICBC ; Commercial Bank of China office
改善推行办公室 SUB-KPO SUB-Kaizen Promotion Office
行政办公室 Executive Office ; administrating office ; Office of Administration ; fifth floor Excutive office
莫斯科银行办公室 Bank of Moscow office
执行办公室主任 Director of Executive Office
计划执行办公室 Program Executive OffieeS oldier ; Program Executive Office ; PEO SOLDIER
流行办公室的桌边瑜伽 Office desk yoga popular
提供航空公司、代理人、报关行办公室出租。
Office to rent for airlines, forwarders and customs brokers.
查询9没有为该员工生成一行，因为for循环遍历的是不同的office值，这些值不包括丢失的办公室信息。
Query 9 doesn't produce a row for that employee because the for loop iterates over the distinct office values which do not include missing office information.
请注意，在查询10中多获得了一行，这是因为SQL的group by函数还为null值生成一个组，我们的示例表中有一名员工没有办公室信息。
Note that we get an extra row from Query 10, because SQL's group by also produces a group for NULL values, and there is one employee in our sample table with no office information.
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