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Explain I command in QBE ?
I : It is the command in QBE that is used to insert tuple (s) into the database
what is cascading rollback
Which component is not included in database environment ? A users component is not included in database environment.
prototype of a distributed information system for a national car part retail outlet chain.
what problems are raised by the database? why is it so controversial? why is data quality an issue?
Conflicting Operations in Schedule: The three simple ways of interleaved instruction implement of transactions T1 and T2. Please note that in the following tables the first col
a. Construct a query around any one of the functional divisions you made in 4a such that if executed in the distributed design of 4 would require reconstruction of at least two ho
In tuple relational calculus P1 → P2 is equivalent to ? A In tuple relational calculus P1→ P2 is equivalent to ¬P1 V P2. (The logical implication expression A B, meaning
Explain the EXISTS and UNIQUE functions of SQL. Give an example for each? EXISTS: The EXISTS function takes one parameter that is a SQL statement. If any records exist which
We require an advanced system for a Sports Centre, you are concerned only with representing the data discussed below about bookings and members. (The complete system may contain ot
#explain five disadvantages of a dbms..
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