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I need a professional to prepare a database to collect and store basic information. The information can be basic info such as contact details etc. One requirement i have is f
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In which relational modes, cardinality is termed? Answer : Cardinality is termed in a number of tuples relational modes.
Serialisable Schedules: If the processes of two transactions conflict with each other, how to verify that no concurrency related problems have happened? For this, serialisability t
What are referential integrity constraints? A value that appears in single relation for a given set of attributes also appears for a particular set of attributes in another rel
What is the difference among a database schema and a database state? The collection of information stored in database at particular moment in time is known as database state a
Which operation is used if we are interested in only certain columns of a table? PROJECTION operation is used if we are interested in only certain columns of a table.
List any two significant differences between a file processing system and a DBMS. File Processing System vs. DBMS Data Independence - Data independence is the capacity t
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
examples of fields in a database
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