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Knowledge in dbms
Data Base Management System : sql and ER diagrams
A database management system (DBMS) is a software package designed to define, manipulate, retrieve and manage data in a database. A DBMS generally manipulates the data itself, the data format, field names, record structure and file structure. It also defines rules to validate and manipulate this data.
Sucheta Kulkarni
Data Base Management System : basics , syntax of sql
A database management system (DBMS) is a software package designed to define, manipulate, retrieve and manage data in a database. A DBMS generally manipulates the data itself, the data format, field names, record structure and file structure.
Data Base Management System
A database management system (DBMS) is a software package designed to define, manipulate, retrieve and manage data in a database. A DBMS generally manipulates the data itself, the data format, field names, record structure and file structure.
database and sql notes
These are the notes of database and sql .These will help you clear the basic concepts of sql.
Kritika Rai
Database Management Systems
Database Management System or DBMS in short refers to the technology of storing and retrieving usersí data with utmost efficiency along with appropriate security measures. This tutorial explains the basics of DBMS such as its architecture, data models, data schemas, data independence, E-R model, relation model, relational database design, and storage and file structure and much more.Why to Learn DBMS?Traditionally, data was organized in file formats. DBMS was a new concept then, and all the research was done to make it overcome the deficiencies in traditional style of data management. A modern DBMS has the following characteristics −Real-world entity − A modern DBMS is more realistic and uses real-world entities to design its architecture. It uses the behavior and attributes too. For example, a school database may use students as an entity and their age as an attribute.Relation-based tables − DBMS allows entities and relations among them to form tables. A user can understand the architecture of a database just by looking at the table names.Isolation of data and application − A database system is entirely different than its data. A database is an active entity, whereas data is said to be passive, on which the database works and organizes. DBMS also stores metadata, which is data about data, to ease its own process.Less redundancy − DBMS follows the rules of normalization, which splits a relation when any of its attributes is having redundancy in values. Normalization is a mathematically rich and scientific process that reduces data redundancy.Consistency − Consistency is a state where every relation in a database remains consistent. There exist methods and techniques, which can detect attempt of leaving database in inconsistent state. A DBMS can provide greater consistency as compared to earlier forms of data storing applications like file-processing systems.Query Language − DBMS is equipped with query language, which makes it more efficient to retrieve and manipulate data. A user can apply as many and as different filtering options as required to retrieve a set of data. Traditionally it was not possible where file-processing system was used.
Ritasri Maity
Data Independence of DBMS
A database system normally contains a lot of data in addition to users’ data. For example, it stores data about data, known as metadata, to locate and retrieve data easily. It is rather difficult to modify or update a set of metadata once it is stored in the database. But as a DBMS expands, it needs to change over time to satisfy the requirements of the users. If the entire data is dependent, it would become a tedious and highly complex job.Metadata itself follows a layered architecture, so that when we change data at one layer, it does not affect the data at another level. This data is independent but mapped to each other.Logical Data IndependenceLogical data is data about database, that is, it stores information about how data is managed inside. For example, a table (relation) stored in the database and all its constraints, applied on that relation.Logical data independence is a kind of mechanism, which liberalizes itself from actual data stored on the disk. If we do some changes on table format, it should not change the data residing on the disk.Physical Data IndependenceAll the schemas are logical, and the actual data is stored in bit format on the disk. Physical data independence is the power to change the physical data without impacting the schema or logical data.For example, in case we want to change or upgrade the storage system itself − suppose we want to replace hard-disks with SSD − it should not have any impact on the logical data or schemas.
DBMS Article
DBMS Article
Sachin Agarwal
PPT on basics of Database management systems
PPT on basics, characteristics, and advantages of dbms.
Shivam Sharma
PPT on data models, schemas, and instances in DBMS
PPT on data models, schemas, instances, 3 schema architecture etc for engineering students studying DBMS.
Shalini Vats
Database Management System Previous Year Questions With Solution
Previous Year Question Paper of Database Management System with Solutions for Diploma Students conducted by State Board of Technical Education (SBTE), Jharkhand. Important Questions to score better in Semester Exams of Diploma Course. Regular basis Questions to be asked in exams conducted by State Board of Technical Education (SBTE), Jharkhand. Easy language answers/solution so that everyone could understand the answers and keep developing their knowledge. Database management system is one of the core subjects in Computer Science and Engineering Department and have a very good scope in job life for the CSE students.
Prem Kumar
DBMS Assignment (3 in one)
It contains few questions which are important in point of view for the examination. This was the assignment given which helps to grasp and learn the basics but the most important questions easily. It contains few questions and definition which might help one to understand and learn the dbms concepts easily. This handwritten assignment might be helpful to all who wants to learn dbms in efficient way. This 3 in one assignment is related to unit 1 and 2 from the ipu syllabus for 4th semester or 2nd year students of branch IT and CSE studying in ipu affiliated colleges or universities itself.
Hemant Nasa
DBMS Lab Assignment in MAIT
It is the assignment given by the teachers of our college to the students for lab work
Venus Nasa