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Create table employee and enter employee data in SQL?
Consider the following relational schemas: EMPLOYEE (EMPLOYEE_NAME, STREET, CITY) WORKS (EMPLOYEE_NAME, COMPANYNAME, SALARY) COMPANY (COMPANY_NAME, CITY) Specify the table definitions in SQL.
Ans. CREATE TABLE EMPLOYEE( EMPLOYEE_NAME VARCHAR2(20) PRIMARY KEY,STREET VARCHAR2(20),CITY VARCHAR2(15));CREATE TABLE COMPANY( COMPANY_NAME VARCHAR2(50) PRIMARY KEY,CITY VARCHAR2(15));CREATE TABLE WORKS( EMPLOYEE_NAME VARCHAR2(20)REFERENCES EMPLOYEE(EMPLOYEE_NAME,COMPANYNAME VARCHAR2(50)REFERENCES COMPANY(COMPANY_NAME,SALARY NUMBER(6),CONSTRAINT WORKS_PK PRIMARY KEY(EMPLOYEE_NAME, COMPANY_NAME));
Un-Normalized Form (UNF) If a table having non-atomic values at every row, it is said to be in UNF. An atomic value is something that cannot be further decomposed. A non-atomic
What is Management System? A management system is a set of rules and process which help us to create organize and manipulate the database. It also helps us to add, change delet
What is recovery management component? Ensuring durability is the responsibility of a software component of the base system known as the recovery management component.
What is transaction? Collections of operations that form a single logical unit of work are known as transactions.
Mention the various user privileges All privileges directly granted to the user or role. All privileges granted to roles that have been granted to the user or role.
random file sharing
Define Specialisation and generalization in brief? Specialisation / generalization: Generalization or Specialization represents the is a relationship set, an necessary element
What are the drawbacks of File Oriented System in details?
explain participation constraints with examples
Demonstrate the Design of associations During object design phase we must design a strategy to implement associations. Association may be unidirectional or bi-directional. Wha
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