dai77
23.11.2019 •
Computers and Technology
Aperson who is skilled at performing calculations, has math skills for advanced analysis, and has organizational skills would be best suited to work as
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Ответ:
B. both output compatible data types for each column and return the same number of rows.
Explanation:
In order for two queries to be UNION-compatible, they must be both output compatible data types for each column and return the same number of rows.
It should be noted that two relations are union compatible when both relations have the same attributes and also the domain regarding the identical attributes are thesame.