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Mention the type of constraints we can specify in the CREATE command of DDL. The type of constraints that can be specified are as follows:- PRIMARY KEY, NOT NULL, UNIQUE, FOR
What is database Trigger? A database trigger is a PL/SQL block that can explained to automatically execute for insert, update, and delete statements against a table. The trigge
What subschema expresses ? A subschema expresses the external view. (External schemas are called also called as subschemas)
Components of database manager The above functions are reached by the database manager. The major elements of a database manager are: Authorisation control: This mod
Primary index A primary index is a file that has a sorted series of records having two columns: a block address for that key field in the data file; and the ordering key field.
The advantages of a database management system (DBMS) include :- Data integrity and elimination of duplication.
Describe the shadow paging technique.
Process of normalization is the integral part of designing a database. Justify this statement with suitable database design
What is the difference between link and reference? The fundamental difference between links and references is that links are symmetrical on the other hand references refer only
What is called a query -execution engine? The query implementation engine takes a query evaluation plan, implements that plan, and returns the answers to the query.
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