Insert command is data manipulation commands, which is used to manipulate data by inserting the information into the tables.This command is used to add records to a table. While inserting a record using the insert statement, the number of records being entered should match in the columns of the table. In case the number of items being created is less than the number of columns, the field names also need to be specified along with the insert statement.Insert commandIt is used for inserting the records into the table.The syntax is as follows −INSERT INTO table-name VALUES(field1, field2, ……..)ExampleGiven below is ... Read More

The overall design of the Database Management System (DBMS) depends on its architecture. A large amount of data on web servers, Personal Computers (PC) and other elements are linked with networks with the help of basic client or server architecture.PCs and workstations are part of Client architecture that are connected over the network. The architecture of DBMS depends on how the users are linked to the database.There are three kinds of DBMS Architecture, which are as follows −Tier-1 Architecture.Tier-2 Architecture.Tier-3 Architecture.Tier-3 ArchitectureThe 3-tier architecture contains one more layer between the client and the server.In this architecture, there is no direct ... Read More

The overall design of the Database Management System (DBMS) depends on its architecture. A large amount of data on web servers, Personal Computers (PC) and other elements are linked with networks with the help of basic client or server architecture.PCs and workstations are part of Client architecture that are connected over the network. The architecture of DBMS depends on how the users are linked to the database.There are three kinds of DBMS Architecture, which are as follows −Tier-1 Architecture.Tier-2 Architecture.Tier-3 Architecture.Tier-2 ArchitectureThe 2-tier Architecture is based on a client-server machine.In this type of architecture, the applications on client-side interact directly ... Read More

The overall design of the Database Management System (DBMS) depends on its architecture. A large amount of data on web servers, Personal Computers (PC) and other elements are linked with networks with the help of basic client or server architecture.PCs and workstations are part of Client architecture that are connected over the network. The architecture of DBMS depends on how the users are linked to the database.There are three kinds of DBMS Architecture, which are as follows −Tier-1 Architecture.Tier-2 Architecture.Tier-3 Architecture.Tier is a physical unit where the program code or a process is run.For example − data base server, application ... Read More

Select command is used to fetch the data in a set of records from a table, view or a group of tables, views by making use of SQL joins.Retrieval of data using SQL statements can be done by using different predicates like −WhereGroup ByHavingOrder ByThe simplest example of a select statement where in a user wants to, retrieve all the records of a table, can be performed by using '*'.First let's create and insert the data in table before retrieving the data using select command −Step 1create table student(name char(30), regno number(10), branch char(20), age char(10));The output will be as ... Read More

Let’s see the definitions of file systems and database management systems before understanding the difference.File Management SystemIt is nothing but a collection of programs which manage and store data in files and folders in a computer hard disk.It helps in reading and writing data to the hard disk. It is also called a conventional file system.Data redundancy is high and cannot be controlled easily in file management systems.Database management system (DBMS)It is defined as a software system that allows the user to define, create and maintain the database and provide control access to the data.DBMS is a collection of programs ... Read More

The Database Management System (DBMS) is defined as a software system that allows the user to define, create and maintain the database and provide control access to the data.It is a collection of programs used for managing data and simultaneously it supports different types of users to create, manage, retrieve, update and store information.Applications of DBMSIn so many fields, we will use a database management system.Let’s see some of the applications where database management system uses −Railway Reservation System − The railway reservation system database plays a very important role by keeping record of ticket booking, train’s departure time and ... Read More

Hardware, Software, Data, Database Access Language, Procedures and Users all together form the components of a DBMS.Let us discuss the components one by one clearly.HardwareThe hardware is the actual computer system used for keeping and accessing the database. The conventional DBMS hardware consists of secondary storage devices such as hard disks. Databases run on the range of machines from micro computers to mainframes.SoftwareSoftware is the actual DBMS between the physical database and the users of the system. All the requests from the user for accessing the database are handled by DBMS.DataIt is an important component of the database management system. ... Read More

The Database Management System (DBMS) is defined as a software system that allows the user to define, create and maintain the database and provide control access to the data.It is a collection of programs used for managing data and simultaneously it supports different types of users to create, manage, retrieve, update and store information.Advantages of DBMSThe advantages of the DBMS are explained below −Redundancy problem can be solved.In the File System, duplicate data is created in many places because all the programs have their own files which create data redundancy resulting in wastage of memory. In DBMS, all the files ... Read More

There are so many characteristics of a database management system, which are as follows − A database management system is able to store any kind of data in a database. The database management system has to support ACID (atomicity, consistency, isolation, durability) properties. The Database management system allows so many users to access databases at the same time. Backup and recovery are ... Read More