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Consistency error: These errors happen due to the inconsistent state of database caused may be due to wrong implementation of commands or in case of a transaction abort. To overcome these errors the database system should contain routines that check for the consistency of data entered in the database.
Let us now talk about the relational operations: SELECT The select operation is used to select few specific record from the database based on different criteria, This is a un
Define blocks? The database system resides eternally on non-volatile storage, and is into fixed-length storage units known as blocks.
A student entity type has the following attributes,name..
What is trigger? Triggers are statements that are executed automatically by the system as the side effect of a modification to the database.
To delete a particular column in a relation which command is used ? To delete a particular column in a relation ALTER command is used.
Creating views with Read only option : In the view definition this option is used to make sure that no DML operations can be done on the view.
What function divides one numeric expression by another and returns the remainder? MOD function divides one numeric expression by another and returns the remainder.
What functions does a data dictionary perform? In a (DBMS)data management system, the principal functions performed by the data dictionary are Management of data defini
HOW TO SOLVE THE LP Problems by simplex method?z=x1+-3x2+2x3
Define null values. In some cases a certain entity may not have an applicable value for an attribute or if we do not know the value of an attribute for a certain entity. In the
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