A、The tables being joined have NOT NULL columns.
B、The tables being joined have only matched data.
C、The columns being joined have NULL values.
D、The tables being joined have only unmatched data.
E、The tables being joined have both matched and unmatched data.
F、Only when the tables have a primary key/foreign key relationship.
更多“In which two cases would you use an outer join?（）”相关的问题
A、all kinds of cases B、two kinds of cases C、cases involving foreign citizens D、cases involving a state
A、A. The default OSPF domain-id is 127.0.0.1. B、B. In most cases, a domain-id must be configured. C、C. In most cases, you do not need to configure a domain-id. D、D. For a layer 3 VPN connecting multiple OSPF domains, configuring a domain-id can help control LSA translations.
A、two or more impellers housed together in one casing and mounted on a single shaft B、a single stepped impeller mounted in a progressively staged casing C、a large radial clearance between the impeller and casing to prevent overheating due to D、an increase in the discharge velocity of the liquid with a corresponding decrease in pressure through the stages
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