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What is a primary key?
Primary key is chosen by the database designer as the principal means of identifying an entity in the entity set.
What are the several kinds of the update operations on relations? Also explain the constraints on these update operation. Give instance in support of your answer. There are th
sql is relationally complete-justify
Explain the Exec statement in SQL Ans: Exec statement has the structure EXEC SQL END-EXEC Embeded SQl statements are of a form identical to non embedded SQL statem
What is meant by mean time to failure? The mean time to failure is the amount of time that the system could run continuously without failure.
Which is another name for weak entity? Child is another name of weak entity.
What is the error handling Traditionally, bits have been sent over line lacking any error correcting scheme in physical layer. The presence of the CPU in each modem makes it po
how to prepare a data dictionary for online examination system for certified courses?
Project Description: My VBulletin forum was hacked, and soon after my server machine died. So, I'm now on a new machine, and I think that I've taken care of 99% of the hacking..
Data Base Management System 1. Draw the Architecture of MySQL and explain about its subsystems briefly. 2. Elaborate with the help of an example the concept of Primary key a
When It is better to use files than a DBMS? It is better to use files than a DBMS when Multiple users wish to access the data.
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