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Explain trigger?
Trigger: A database trigger is procedural code which is automatically executed within response to certain events on a particular table in a database. Triggers could restrict access to exact data, perform logging, or audit data modifications.
What are the technique to define a schema completely ? A schema is completely define by DDL and DML query language.
FDs in Entities : Student entity : Enrolment number → Student name, Address Course Entity :
Write a query that display ename annual salary and comm from emp table
Determine Which is not a consequence of concurrent operations? Ans: Update anomaly.
What is the max. no. Of structures that can be included in a table or structure. Nine.
List the types of authorization. A) Read authorization B) Write authorization C) Update authorization D) Drop authorization
Define NULL value NULL value NULL means something is unknown. It does NOT mean null (the digit 0). Null is as well employed as attribute value for a particular entity in which
Problem 1. Describe the Oracle Architecture with a neat labeled diagram, Also explain the individual components of the Architecture. 2. Write about the following Oracle 9i o
Availability: A site having the copy of a replicated relation fails, even then the relation may be found in another site. Therefore, the system may carry on to process at least th
A database is to be constructed to remain track of the teams and games of a sport league. A team has a number of players, not all of whom participate in every game. It is desired
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