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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
Safe Banking is a Canberra based credit union, which has several branches around Canberra and Queanbeyan. YOU have taken over Safe Banking. YOU need to create a database that organ
Submission Requirements All answers must be computer generated (including text and diagrams). The hand-in version must include a header page (or with sufficient space)
What is storage manager? A storage manager is a program module that gives the interface between the Low level data kept in a database and the application programs
What is Explicit update In explicit update, each derived attribute is defined with respect to one, or more fundamental base object(s). The object designer determines that de
What is trigger? Triggers are statements that are executed automatically by the system as the side effect of a modification to the database.
Which operator is Cartesian product in relational algebra? Cartesian product in relational algebra is a binary operator. (It requires two operands. e.g., P X Q)
Define rotational latency time. The time spent waiting for the sector to be accessed to appear under the head is known as the rotational latency time.
What are the properties of transaction? There are three properties of transactions :- A) Atomicity B) Consistency C) Isolation
The Second Normal Form (2NF) Definition: A relation is in 2NF if it is in 1NF and each non-key attribute is fully dependent on each candidate key of the relation. Some of th
What are composite attributes? Composite attributes can be separated in to sub parts.
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