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What is called query processing?
Query processing refers to the range of activities included in extracting data from a database.
what are the reasons having variable length records
Which are the two ways in which entities can participate in a relationship? Total and partial are the two ways in which entities can participate in a relationship
HOW TO SOLVE THE LP Problems by simplex method?z=x1+-3x2+2x3
Define database management system? Database management system (DBMS) is a set of interrelated data and a combination of programs to access those data.
Draw an entity relationship diagram (ERD) for the following situation: A company has a number of employees. Each employee is identified by an Employee_Id. The company wants to st
What is the main difference between read-only and update methods? A read-only method does not affect the values of a variable in an object, whereas an update method may alter t
Update or Modify operation alters the existing values. If these operations alter the value that is the foreign key also, the only check need is the similar as that of the Insert op
Self-Join: In a self join a table is joined with itself. Let consider the following sample partial data of EMP table EMPNO ENAME MGRID
CAN SOMEONE HELP ME WITH ENTITY DIAGRAMS IN FIRST NORMAL FORM?
Explain the two constraints, check and foreign key in SQL along with an example for each. Give the syntax. CHECK constraint - CHECK constraint specifies an expression which
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