Relational Database Management System (RDBMS)

8/6/2019 Relational Database Management System (RDBMS)

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RELATIONAL DATABASE MANAGEMENT

SYSTEM (RDBMS)

Able to reliably manage large data into multi-userenvironment.

Relates data in different files through the key field.

Payroll

Emp_info Project

Employee NumberProject Number


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ORACLE TOOLS

1. SQL * PLUS: for writing command line SQL queries to work withdatabase objects.

2. PL/ SQL: oracles extension, It is a procedural language

3. Query: creating SQL query using graphical environment. It allow to

write the DDL, DML, and DCL statements.

4. Developer : used for developing database applications

- Form Builder: It is useful to create graphical forms and menu.

- Report Builder: To create reports in different formats, save the

reports, print the data.

- Developer Graphics Builder it is used to create the graphical

charts like, Bar Charts, Pie Charts etc. based on data


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ORACLE TOOLS

5. Enterprise Manager : a tool for managing uses following tools

- Storage Manager : To create and manage table space

- Instance Manager: To start, stop pr tune database.

- Security Manager: To create and manage users and role

6. Oracle Web Application Server:A tool for creating a web site that

allows user to access oracle database through web pages


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ORACLE DBA

installing the oracle database, managing the day-to day needs of thecomplex database, and running the system at a peal performance

performs software maintenance, resource management, data

administration, database tuning, and troubleshooting, data security and

backup and recovery.


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ORACLE DBA

Basic duties or Role or Responsibilities of the DBA:1. Installing of new hardware and software

2. Configuration of hardware and software with the system

administration

3. Security administration

4. Performance tuning & monitoring:

5. Backup and Recovery

6. Routine schedule maintenance

7. Troubleshooting

8. Failure Recovery

9. Crate,Alter and remove database, data users and Roles

10. Grant and restrict access rights


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SQL * PLUS

ad-hoc user interface tool for the oracle RDBMS

run SQL commands and PL / SQL programs

most common ways to communicate interactively with the oracle

database

can edit or save the SQL statements that are in the SQL buffer


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SQL * PLUS

Feature of SQL * PLUS

Accepts SQL statement from file.

Accept adhoc entry of statements at the prompt

Provides a line editor for modifying SQL Queries.

Provides environment, editor, format, execution,interaction, and file commands.

Formats query results and displays reports on

the screen. Controls environmental settings

Accesses local and remote database


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TABLE SPACE

A database is divided into logical storage units calledtable spaces

System

Table space

Accounting

Table space

Purchasing

Table space

Systemdatafile1

Disk1 Disk2 Disk3

Acct.

datafile1

Acct.

datafile2

Disk3

Acct.

datafile3

Pur.datafile1

distribute the I/o load and improve performance.


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SCHEMA OBJECTS

A schema is a collection of objects

1. TABLE : which consists of a table name and rows and column of data

2. CLUSTER : is set of tables physically stored together as one table

that shares a common column.

3. INDEX : to increase the performance of data retrieval.

4. VIEW : a custom-tailored presentation of the data in one or more

tables. rather they derive their data from the table on which they are

based

5. STORED PROCEDURE: It is a predefined SQL query that is stored inthe data dictionary .

6. DATABASE TRIGGER: is a procedure that is run automatically when

an event occurs

7. SEQUENCE : used to automatically generate a unique sequence of

number in cache .


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Structured Query Language (SQL)

SQL is a very simple, yet powerful, database access language

SQL is non-procedural language

SQL statements: is a specific instance of a valid SQL command.

consist of SQL reserved words, which have special meaning in

SQL

Emp Id Name Join Dt

1 G. Gore 01-JUN-

07

2 K. Kale 12-Aug-05

3 P. Pandhre 01-jan-01

Emp_Info

Select Name from Emp_info;

Insert into Emp_info


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Types of SQL statements

SELECT

INSERT , UPDATE, DELETE,

CREATE, ALTER, DROP, RENAME TRUNCATE

COMMIT ROLLBACK, SAVEPOINT

GRANT, REVOKE

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Relational Database Management System (RDBMS)