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Aggregate functions Some of these functions are min, count, max, and avg. These functions help in getting consolidated information from a set of tuples. Example:
normal forms
# ???? ..
What are the ways in which signal can be generated A signal might be generated in many ways such as a Signal is result of particular physical condition. Whenever a process writ
Which data manipulation command combines the records from one or more tables ? JOIN data manipulation command combines the records from one or more tables.
List the types of authorization. A) Read authorization B) Write authorization C) Update authorization D) Drop authorization
What are the reasons for having variable length records? What are the various ways to store variable length records? Variable-length records arise in a database in various wa
Assume you are given a uniprocessor system with one gigabyte of memory and a 300 gigabyte disk. The OS on the machine has a demand paged virtual memory system with a local page rep
Explain P command in the respect of QBE? P: It is the command in which is used to print (logically display) the value of the attribute in whose cell it is writ
Define multivalued dependency and 4NF. Ans: Multivalued Dependency - Assume R be a relation schema and let α ⊆ R and β ⊆ R. The multivalued dependency α →→β holds o
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