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You want to implement following relationships when designing tables. How would you do it?
a.) One-to-one
b.) One-to-many
c.) Many-to-many
a.) One-to-One relationship - can be implemented as a single table and seldom as two tables with foreign and primary key relationships.
b.) One-to-Many relationships - by splitting data into 2 tables with foreign key and primary key relationships.
c.) Many-to-Many - by using a junction table with keys from both tables forming composite primary key of junction table.
various techniques of hashing?
Benefits: It limits data access. It makes difficult queries look easy. It permits data independence. It presents dissimilar views of the similar data.
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Determine the Strong and Weak Entity Based on the method of foreign key, there might be arise a situation when we have to relate an entity having a primary key of its own and a
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What are the two types of serializability? The two types of serializability is a) Conflict serializability b) View serializability
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What are the advantages of relational data model? Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer
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