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Update Anomaly: This anomaly is occurred due to data redundancy. Redundant information makes updates more complex since, for example, varying the name of the instructor of MCS-014 would need that all tuples having MCS-014 enrolment information be updated. If for some reason, all tuples are not updated, we may have a database that gives 2 names of instructor for the subject MCS-014 which is inconsistent information. This problem is known as update anomaly. An update anomaly results in data inconsistency.
Strict 2PL :Though, this basic 2PL suffers from the trouble that it can result into loss of isolation / atomic property of transaction as theoretically speaking once a lock is rele
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Hardware failure : Hardware failures are the failures when some disk or hardware chip fails. This may result in loss of data. One such trouble can be that a disk gets damaged and
What are the technique to define a schema completely ? A schema is completely define by DDL and DML query language.
What is trigger Triggers are statements that are implemented automatically by the system as the side effect of a change to the database.
Give some encryption techniques? A) DES B) AES C) Public key encryption
Create role named role_table that allows a user to create tables. Using role_table allow users kripa and reena to create tables. CREATE ROLE role_table; GRANT CREATE ANY TABLE
Write short notes on Schema diagram. A database schema along with primary key and foreign key dependencies can be depicted pictorially by schema diagram. Every relation appears
List the steps for converting state diagram to the code. a) Finding major control path b) Finding the conditional statements c) Finding the loops d) Finding error ro
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