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Define page. The database is partitioned into some number of fixed-length blocks, which are referred to as pages.
Explain the EXISTS and UNIQUE functions of SQL. Give an example for each? EXISTS: The EXISTS function takes one parameter that is a SQL statement. If any records exist which
external view of DBMS in healthcare department?
Special comparison operator used in where Clause a. between. ...and...It gives range among two values (inclusive) Example: SELECT ENAME, SAL FROM EMP WHERE SAL BETWE
online eductional management system ke diagram
why three level architecture had been developed/
Hierarchical model is also known by? A hierarchical model is also known as a Tree structure.
Explain Strict Two-Phase locking A transaction T does not release any type of its exclusive (X) locks until that transaction commits or aborts. In this method no other transact
how to write tables and drow E-R diagrams for hosiptal management system and how to normalize and cardinalities?
Explain Candidate key? Candidate Key - A candidate key is a minimal superkey, that can be used to uniquely identify a tuple in the relation.
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