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DBMS Interview Questions for beginners and professionals with a list of top frequently asked DBMS interview questions and answers with java, .net, php, database, hr, spring, hibernate, android, oracle, sql, asp.net, c#, python, c, c++ etc.
- What is SQL? SQL stands for the Structured Query Language. It is the standard language used to maintain the relational database and perform many different data manipulation operations on the data.
- When SQL appeared? SQL first appeared in 1974. It is one of the most used languages for maintaining the relational database. In 1986, SQL became the standard of the American National Standards Institute (ANSI) and ISO (International Organization for Standardization) in 1987.
- What are the usages of SQL? SQL is responsible for maintaining the relational data and the data structures present in the database. Some of the common usages are given below
- Does SQL support programming language features? SQL refers to the Standard Query Language. Therefore, it is true that SQL is a language but does not actually support the programming language.
- Write a query to create the table in Structured Query Language. Sol: Syntax to Create a Table in SQL: CREATE TABLE table_name ( column_Name1 data type (size of the column), column_Name2 data type (size of the column), column_Name3 data type (size of the column), ...
- Write a query to insert the data into the table. Sol: Syntax to insert data into a table: INSERT INTO Table_Name VALUES (value_1, value_2, value_3, ....
- Write a query to view the specific record of the table by using the WHERE clause. Sol: Syntax to access specific records from the table: SELECT * FROM Table_Name WHERE condition;
- Write a query in SQL to find the minimum and maximum number from the integer column: Sol: Syntax to find the maximum and minimum number from the column
- What is meant by DBMS and what is its utility? Explain RDBMS with examples. As the name suggests DBMS or Database Management System is a set of applications or programs that enable users to create and maintain a database.
- What is meant by a database? A Database is an organized, consistent, and logical collection of data that can easily be updated, accessed, and managed.
- Mention the issues with traditional file-based systems that make DBMS a better choice? The absence of indexing in a traditional file-based system leaves us with the only option of scanning the full page and hence making the access of content tedious and super slow.
- Explain a few advantages of a DBMS. Following are the few advantages of using a DBMS. Data Sharing: Data from a single database can be simultaneously shared by multiple users.
- What are the advantages of DBMS over traditional file-based systems? Database management systems were developed to handle the following difficulties of typical File-processing systems supported by conventional operating systems.
- What are super, primary, candidate, and foreign keys? A super keyis a set of attributes of a relation schema upon which all attributes of the schema are functionally dependent.
- What is the difference between primary key and unique constraints? The primary key cannot have NULL value, the unique constraints can have NULL values.
- What is database normalization? It is a process of analyzing the given relation schemas based on their functional dependencies and primary keys to achieve the following desirable properties
Jun 28, 2024 · 1) Define Database. A prearranged collection of figures known as data is called database. 2) What is DBMS? Database Management Systems (DBMS) are applications designed especially which enable user interaction with other applications. 👉 Free PDF Download: Database (DBMS) Interview Questions & Answers >>
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Sep 12, 2022 · Database example. 2. What is a DataBase Management System (DBMS)? In terms of programming, a database management system is a software for creating and managing databases. DBMS allows us to create, protect, read, update and delete data in a database. It works as an interface between databases and us or application programs.
