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To delete a particular column in a relation which command is used ?
To delete a particular column in a relation ALTER command is used.
how design database from begining
What is trigger? Triggers are statements that are executed automatically by the system as the side effect of a modification to the database.
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
Answer SQL Queries to extract data from data tables and questions on mapping conceptual data models into relational data model.
The definition of the classes and operation can often be adjusted to increase the amount of inheritance". Justify the above statement. Adjustment of Inheritance The def
Critically evaluate the bulleted list of information-related items in this case study. How are each contradictory to the notion of being an information-literate knowledge worker?
What is the use of keyword ISA? The use of keyword ISA is to show that a class is a specialization of another class.
Consider employee (e_no, e_name, e_salary, d_code), dept (d_code, d_name) and dependent (depndt_name, e_no, relation). Show the names of employees in purchase and accounts departm
How many levels can be viewed in Architecture of the database ? Architecture of the database can be viewed as three levels.
Which database level is closest to the users? External database level is closest to the users.
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