Generalization in DBMS

Generalization in DBMS In the database management system, generalization is a concept combining the common attributes of two or more lower-level entity and form a new higher level with the common attributes. In this DBMS concept, we can also combine the generalized...

Data Models in DBMS

Data Models in DBMS Data models are the models explaining the logical structure of the database systems. They describe the entities, attributes, and the relationship among the data elements of the specified database. Data models organize the description and...

Specialization in DBMS

Specialization in DBMS In the database management system, specialization breaks the higher-level entity into two or more than two lower entities. The main motive of this concept is to share the common attributes or properties between the entities in the same database....

Disadvantages of DBMS

Disadvantages of DBMS With the vast list of advantages, there are some following disadvantages or limitations of the database management system. 1. High Cost The high cost of software and hardware is the main disadvantage of the database management system. Database...

Advantages of DBMS

Advantages of DBMS A Database Management System (DBMS) is a collection of programs which lets the end-users to manage and control the database. Database systems use query language for accessing, storing, and maintaining the data in the databases. DBMS is a layer...

Super Key in DBMS

Super Key in DBMS: The super key is a column or a set of columns in the database table, which uniquely identifies the tuple or row of the same table. It is a type of key, which is the superset of the candidate key. We are describing this concept with the following...

Trigger in DBMS

Trigger in DBMS: A trigger is a procedure of SQL statements, which is automatically fired when the DML statements are executed on the table of the database. Triggers are the event-driven procedures, which are managed and stored by the database management system....

File Organization in DBMS

File Organization in DBMS: A database contains a huge amount of data, which is stored is in the physical memory in the form of files. A file is a set of multiple records stored in the binary format. In the database management system, the file organization describes...

DBMS View: Read, Update, Create and Drop

View in DBMS: The View is a logical or virtual table that allows users to view or manipulate parts of the table. View is also a table which consists of rows and columns. Users can easily create the view in the database by selecting the fields from two or more tables...

DBMS Data Independence: Logical and Physical

Data Independence in DBMS: Data independence is a concept of DBMS which alters the schema of the database at one level of the database system without altering the schema definition of same database at the next higher level. It helps the users by improving the quality...

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