Basics of Networking

In DBMS first thing that any one should know is Client Server Architecture. This is not only true for DBMS but for anyone in IT should have basic knowledge of networking.

You can read about basics of networking from the links below.

www.unt.edu/zlot/survey/client_server_krm_01may2002.ppt

http://www.indiabix.com/technical/networking/3

http://www.mhprofessional.com/downloads/products/0071615385/0071615385_chap01.pdf

http://en.wikipedia.org/wiki/OSI_model

http://en.wikipedia.org/wiki/TCP/IP_model

Enjoy your reading.

Comments

Unknown said…

thank u sir....u told us in the classs to know a nit of networking....and ur site helps a lott..

September 22, 2014 at 11:32 PM

Unknown said…

using command promp how to find ip address of the website and vice versa plz reply me.

January 27, 2017 at 11:57 AM

saivenkat said…

Well Said, you have furnished the right information that will be useful to anyone at all time. Thanks for sharing your Ideas.
Business Management Software

July 15, 2020 at 9:44 AM

SQL Interview Questions on Subqueries

SUB Queries:
1. List the employees working in research department 2. List employees who are located in New York and Chicago
3. Display the department name in which ANALYSTS are working
4. Display employees who are reporting to JONES
5. Display all the employees who are reporting to Jones Manager
6. Display all the managers in SALES and ACCOUNTING department
7. Display all the employee names in Research and Sales Department who are having at least 1 person reporting to them
8. Display all employees who do not have any reportees
9. List employees who are having at least 2 reporting
10. List the department names which are having more than 5 employees
11. List department name having at-least 3 salesman
12. List employees from research and accounting having at-least 2 reporting
13. Display second max salary
14. Display 4th max salary
15. Display 5th max salary -- Answer for nth Max Salary
Co-Related Subqueries:
16. Write a query to get 4th max salary from EMP table
17. Write a query to get 2nd…

Basics of RDBMS

Data
Small set of information becomes data, this set of information helps make decision. Data is always some useful information.

Database
Place where you store the data. Database represents some aspect of the real world called "miniworld". A database is designed, built and populated with data for a specific purpose. It has intended group of users and some preconceived applications in which these users are interested.

In other words, a database has some source from which data is derived, some degree of interaction with events in the real world and an audience that is actively interested in the contents of the database.

Database can also be defined as collection of one or more tables.

Ex: Mobile, human brain etc

DBMS (Database Management System)
Is a program that stores retrieves and modifies data in the database on request.

Study of different techniques of design, development and maintenance of the database

Types of DBMS
These types are based upon their management of database s…

Answers for SQL Functions

1. SQL> SELECT empno, ename FROM emp WHERE Length(ename) = 4;

2. SQL> SELECT empno, ename, job FROM emp where Length(job)=7;

3. SQL> SELECT Length('qspiders') - Length(replace('qspiders','s','')) FROM dual;

4. SQL> SELECT empno, ename, job FROM emp WHERE Instr(job,'MAN') >0;

5. SQL> SELECT empno, ename, job FROM emp WHERE Instr(job, 'MAN') =1;

6. SQL> SELECT empno, ename, job FROM emp WHERE (Length(ename) - Length(Replace(ename, 'L',''))) = 1;

7. SQL> SELECT * FROM dept WHERE Instr(dname,'O') > 0;

8. SQL> SELECT Concat(ename,' working as a ') || Concat(job, ' earns ') || Concat(sal, ' in ') || Conc
at('dept ',deptno) AS text from emp;

OR

SQL> SELECT Concat(Concat(Concat(Concat(Concat(Concat(Concat(ename,' working as a '), job),' earns '), sal),' in '),'dept '), deptno) AS text FROM emp;

9. SQL> SELECT empno, ename…

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