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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));
Create an entity relationship diagram, Database Management System
Soccer player ER Diagram to Relational database schema
word limit no mentioned
What is horizontal fragmentation? Horizontal fragmentation divides the relation by assuming every tuple of r to one or more fragments
Define null values. In some cases a certain entity may not have an applicable value for an attribute or if we do not know the value of an attribute for a certain entity. In the
The dataset " CFOLYMPICS.XLS " contains the observations used in the above article. The definitions of the variables are also included in this spreadsheet. However, for the purpo
Birla Institute of Technology & Science, Pilani Work-Integrated Learning Programmes Division Second Semester 2012-2013 EC-1 Assignment 2 (7.5% of the grade) Course No. : SS ZG
Explain the three data models namely relational, network and hierarchical and evaluate their relative advantages and disadvantages. Hierarchical Model: In hierarchical model, da
Adding Redundant Associations for Efficient Access The expression redundant association means using "duplicate association for proficient access". While analysis, it is not a
Define the terms 1) physical schema 2) logical schema. Physical schema: The physical schema explains the database design at the physical level, which is the lowest lev
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