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Define NULL value
NULL value NULL means something is unknown. It does NOT mean null (the digit 0). Null is as well employed as attribute value for a particular entity in which attribute is not applicable for example name of child for unmarried.
What are the ways in which the variable-length records arise in database systems? Storage of many record types in a file. Record types that permit variable lengths for one o
Which operations need the participating relations to be union compatible? A UNION, INTERSECTION and DIFFERENCE operations need the participating relations to be union compatibl
what is Storage-Device Hierarchy question
what is the relationship between receipt and owner entities in computer sales and service company
Explain Two phase locking protocol A transaction is consider as to follow the two-phase locking protocol if all locking operations precede the first unlock operation in the tra
Introductory course and so does not require any fancy coding. I will provide a guidance document to help you in producing the solutions.
What is B-Tree? A B-tree eliminates the redundant storage of search-key values .It permits search key values to appear only once.
Logical Operators Rules of Precedence: Order evaluated Operator 1 All comparison operators 2
What is a Database? To know what database is, we have to start from data, which is the basic building block of any DBMS. Data: Facts, figures, statistics etc. having no pa
1. Determine that the Checkpoints are a part of Ans: Checkpoints are a part of Recovery measures
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