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What is the difference between WHERE and HAVING clauses?.
Predicates in the WHERE clause applies to every tuple while the predicate in the HAVING clause applies to groups.
Domain Constraint It shows that each attribute in a relation has to contain an atomic value only from the corresponding domains. The data types associated with commercial RDBMS
What is conceptual schema? The schemas at the view level are known as subschema that describe dissimilar views of the database.
What are the reasons for having variable length records? What are the various ways to store variable length records? Variable-length records arise in a database in various wa
er diagtram for icici
In Database software have only pure security or some dis secured by administrator?
In which format database schema is written ? Data base schema is written in the DDL format.
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
Create a table according to given data: AmbulanceDriver(Driver_Number#, Name, Address, Birth_Date) AmbulanceDriverTeam(Team_Number#, Driver_Number#, Join_Date, Lea
In an E-R diagram an entity set is represent by? In an E-R digram entity set is represted by rectangle.
Explain the terms primary key, candidate key, alternate key and secondary key. In the given table identify every key? STUDENT(SID,Regno, Name, City) Primary Key: The prim
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