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How to create a table from existing table?
Create table as
e.g, To create a new table ‘N_emp' with employee names and their identification numbers only from employee table, statement is to create table N_emp as select empname, empid from employee
State as Location within a Program In this traditional approach, location of control inside a program totally defines the program state. Any finite state machine may be implem
What is a primary key? Primary key is chosen by the database designer as the principal means of identifying an entity in the entity set.
A database is to be constructed to remain track of the teams and games of a sport league. A team has a number of players, not all of whom participate in every game. It is desired
Describe the term- State Diagram State Diagram: An object could receive a sequence of the input instructions. The state of the object can differ depending upon sequence of in
Answer SQL Queries to extract data from data tables and questions on mapping conceptual data models into relational data model.
Smart Alex Catering Sevice (SACS) is a company offering top class catering staff for prestigious events. The company employs approximately 200 hourly paid contact staff - chefs,
Represent the following scenarios with E-R diagrams drawn using the ER Assistant software. The diagrams should indicate cardinality and optionality of relationships. Transform each
What is the use of group by clause? Group by clause is used to apply aggregate functions to a set of tuples. The attributes given in the group by clause are used to
Define a table in SQL known as Client that is used to store information about the clients. Define CLIENT_NO as the primary key whose first letter must begin with ‘C'. Also ensure t
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