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List the table modification commands in SQL?
A) Deletion
B) Updates
C) Insertion
D) Update of a view
Views in relational algebra: 1. Basic expression contains either a) A relation in the database. b) A constant relation. 2. General expressions are madde out of sma
Find the names of all Albums that have more than 30 tracks. Result: (name: varchar(255))
explain ER Modeling?
Which database object does not physically exist? A view database object does not physically exist.
Update Anomaly : This anomaly is occurred due to data redundancy. Redundant information makes updates more complex since, for example, varying the name of the instructor of MCS-014
Event Occurrence of a process is called event. In other words, the object can receive many input instructions. The changes which occur due to these instructions are known as e
Explain the Cascadeless Schedule A cascadeless schedule is one in which for every pair of transactions Ti and Tj like that Tj reads a data item before written by Ti, the commit
Probelm: (a) A distributed database (DDB) is a collection of multiple, logically interrelated databases which are physically distributed over a computer network" (i) Give a
What are the basic objects of the data dictionary? Tables Domains Data elements Structures Foreign Keys
What is a function group? A function group is a collection of logically related modules that share global data with every other. All the modules in the group are contained in
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