write short notes on domain relational
Write short notes on domain relational calculus
The domain relational calculus uses domain variables that take on values from an attribute domain rather than values for whole tuple.
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define weak and strong entity sets weak entity set entity set that do not have key attribute of their
explain the two types of participation constraint total the participation of an entity set e in a relationship set r is said to be total if each
define the terms i ddl ii dml ddl data base schema is specified by a set of definitions expressed by a special
write short notes on relational model the relational model uses a collection of tables to show both data and
write short notes on domain relational calculus the domain relational calculus uses domain variables that take on values from an attribute
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write short notes on schema diagram a database schema along with primary key and foreign key dependencies can be depicted pictorially by
what is the use of group by clause group by clause is used to apply aggregate functions to a set of tuples
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