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Having clause
Example: Find maximum salary and department number of those departments where maximum salary is more than Rs 20000/-.
SELECT DEPTNO, MAX(SAL) FROM EMP
GROUP BY DEPTNO HAVING MAX(SAL) > 20000;
Explain What is Relation? A database relation is a predefined row or column format for storing information in a relational database. Relations are equal to tables.
Explain the database Planning Project ?
Mixed fragmentation: Sometimes, horizontal fragmentation or vertical fragmentation of a database schema by itself is insufficient to sufficiently distribute the data for some appli
What is the main advantage of the object model? What are its different components? The object model focuses on the logical data structures. Each object model comprises of many
In problems 1 - 4, you are given the columns of a table, and a set of functional dependencies. Determine the normal form of this table. Remember that the normal form is the HIGHE
What is called a query evaluation plan? A sequence of primitive operations that can be used to assess a query is a query evaluation plan or a query implementation plan.
DISADVANTAGES OF RDBMS
Which file organization provides very fast access to any arbitrary record of a file? Hashed file organization provides very fast access to any arbitrary record of a file.
What is a PROJECT operation? The project operation is a unary operation that returns its argument relation with particular attributes left out. Projection is shown by pie (π).
How can one distinguish among different kinds of parameters? Input parameters are used to pass data to subroutines. Output parameters are used to pass data from subrout
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