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Entity types that do not have any key attribute, and therefore cannot be identified independently, are known as weak entity types. A weak entity can be recognized uniquely only by
Explain the differences between structured data and unstructured data. Structured data are facts concerning objects and events. The most significant structured data are numeric
What is OMR? OMR (Optical Mark Recognition) is the translation of marks - or the absence of marks - but not the shape of the mark on forms that have small circles ("also called
Name the various privileges in SQL? A) Delete B) Select C) Insert D) Update
What is DDL? Make a list of commands with short description used in DDL Ans: Data Definition Language that is abbreviated as DDL is a computer language for defining data struct
What is the max. no. Of structures that can be included in a table or structure. Nine.
diagrams and meaning
entity relationship diagram for online examination system
Consider a typical sales invoice that would include the following information. Design a single table to hold all of the information required to store an invoice including this info
What is the function of a Domain? A domain defines the technical settings of a table field. A domain describes a value range, which sets the permissible data values for the
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