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difference between internal schema and external schema in DBMS
Draw the precedence graph of the following schedule and determine whether the schedule is serializable. (Note that all instructions, except lock and unlock, are omitted. We assume
Normal 0 false false false EN-US X-NONE X-NONE
What is RDBMS terminology for a row? A tuple is a RDBMS terminology for a row
diagrams and meaning
Fifth Normal Form (5NF) These relations still have a difficulty. While defining the 4NF we mentioned that all the attributes depend upon each other. Whereas creating the two ta
Draw an ER diagram for company''s database schema
Primary index A primary index is a file that has a sorted series of records having two columns: a block address for that key field in the data file; and the ordering key field.
Define the concept of aggregation. Give two examples where this concept is useful. Ans: Aggregation transforms a relationship among the objects into a higher-level object. A
random file orgnization
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