relational calculus
relational calculus
(database)Two forms of the relational calculus exist: the tuple calculus and the domain calculus.
["An Introduction To Database Systems" (6th ed), C. J. Date,Addison Wesley].
单词 | relational calculus |
释义 | relational calculusrelational calculus(database)Two forms of the relational calculus exist: the tuple calculus and the domain calculus. ["An Introduction To Database Systems" (6th ed), C. J. Date,Addison Wesley]. relational calculusThe rules for combining and manipulating relations; for example De Morgan's law, "the complement of a union is equal to the union of the complements." |
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