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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.
Define Database layer? The database layer defines the data formats used in the database.
The traffic data mgmt. systems infrastructure plan describes the software, hardware, data network, and other elements that will support the TDMS. The infrastructure plan is based o
er diagtram for icici
write a database program for concurrency transaction in a bank
Determine Which is not a consequence of concurrent operations? Ans: Update anomaly.
WHAT IS DATABASE TECHNOLOGIES
Express types of information available in MySQL? Information as regards the result of queries: This includes number of records affected by any SELECT or UPDATE or DELETE st
Spanned and unspanned organisation? Spanned and unspanned organization: If records are not permited to cross block boundaries then the organisation is called unspanned record
Define Physical and Logical independence Ans: Physical data independence: The ability to modify physical level without causing application program to be rewritten. Logic
QUESTION (a)(i) Define the term database. (ii) How is it different from a database management system? (b) What is the difference between an entity and an attribute? (c
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