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To delete a particular column in a relation which command is used ?
To delete a particular column in a relation ALTER command is used.
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
note on hashing technique
Consider the relations City (city_name, state) Hotel (name, address) City_hotel (hotel_name, city_name, owner) Answer the following queries in relational algebra (i) Find
PRINCIPLES OF DATABASE 1. State the following terms: a) Database b) Database Management System c) Entity d) Attribute e) Relationship 2. Discuss the Three Level Architecture
how does Btree differ from a B+ - tree?
State the definition of association An association is a structural relationship which specifies that objects of one thing are connected with objects of another. In UML, asso
anyone have a textbook solutions case fair, 8 edition of vol 1 ?, please give me
Cardinality of Relationship One-to-One Only one entity of the first set is linked to only one entity of the second set. E.g. A teacher teaches a student. Only one teacher
Example: //REVOKE ALL ON EMP FROM MCA12; (All permissions will be cancelled) You can also cancel only some of the permissions. Drop: A user-
Explain the term High level DML? High level DML A high-level or non-procedural DML permit the user to specify what data is needed without specifying how it is to be acquired.
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