Found 6842 Articles for Database

Anomalies means problems or inconsistency which happened during the operations performed on the table. There can be many reasons that anomaly occur for example, It occurs when data is stored multiple times unnecessarily in the database i.e. redundant data is present or it occur when all the data is stored in a single table. normalization is used to overcome the anomalies. the different type of anomalies are insertion, deletion and updation anomaly. Input The same input is used for all three anomalies. Student ID Name Age Branch Branch_Code Hod_name 1 A 17 Civil 101 Aman ... Read More

Data abstraction Data abstraction implies concealing the subtleties that are irrelevant to the users. The database has a mind-boggling complex structure so to separate the information easily, several things are covered up and just pertinent part is open to the client through data abstraction. It is involved by designers to build proficiency for the recovery of data and to diminish the intricacy of given data. It consists of three levels: Physical or Internal Level, Logical or Conceptual Level, View or External Level. Three levels of data abstraction Physical or internal level It is the lowest level of abstraction which depicts ... Read More

It is used to return the name of the current user in sql database server. it does not accept any parameter. Syntax CURRENT_USER Current_user is the function used to get the name of current user Example 1 In this example, we are going to use the current_user function to get the current user name. Input Employee Emp_id Name Dept_name Salary 1 Monu IT 50000 2 Sonu HR 60000 3 Golu Security 70000 This database is currently used by amrendra. Code SELECT CURRENT_USER;#selected current user name Output Amrendra ... Read More

A materialised is defined as a database object that contains the results of a particular query. It could be called as a subset of a table. Any changes in the base table would be reflected in the materialised view. Syntax CREATE MATERIALISED VIEW view_name AS SELECT * FROM table_name WHERE column_name IS NOT NULL PRIMARY KEY (provide_primary_key) Here, view_name is the name of the materialised view, table_name is the base table, column_name are the columns provide_primary_key are the primary keys for the base table. Example 1 In this example, we are gonna have a ... Read More

Create a schema Schema is basically the logical representation of the database. there is a default schema named dbo. Objects gets created inside a schema when ‘create schema’ statement is used. To provide access to other user after the schema is created, we need to impersoinate permissions. Syntax:The syntax to create a schema is − Create schema schema_name Here, we have created a schema named schema_name. Example 1: Granting permissions In this example, we are going to create a schema and grant permissions to have access to that. Algorithm Step 1 − Create a schema. Step 2 − ... Read More

A login is a security check process to authenticate the user and make their data secure. In case of SQL, we need to login to connect to the server. Creating login for the server gives a security advantage. Also, security implications are to be understood and kept in mind while creating a login. A user will be granted the access of the database after user login is provided. Here, we are going to use various methods. Method 1: login with Password We are going to use simply the userid and password to login to the server. Syntax Create login ... Read More

Amazon Web Services (AWS) provides a wide range of cloud storage services to satisfy a variety of needs. Amazon S3 (Simple Storage Service) and Amazon EBS (Elastic Block Store) are two prominent storage alternatives provided by AWS. Read this article to find out more about Amazon S3 and Amazon EBS and how they are different from each other. What is Amazon S3? Amazon S3 (Simple Storage Service) is a highly scalable and long-lasting object storage service offered by Amazon Web Services (AWS). It is designed to store and retrieve any amount of data from anywhere on the internet. S3 ... Read More

AFIS (Automated Fingerprint Identification System) and biometric fingerprint systems are used for fingerprint recognition and identification; however, they differ significantly in scope and functionality. Read this article to find out more about AFIS and Biometric fingerprint systems and how they are different from each other. What is AFIS? AFIS stands for Automated Fingerprint Identification System. It is a computer-based biometric technology that automates fingerprint identification and comparison. The fundamental goal of AFIS is to store, search, retrieve, and analyses massive amounts of fingerprint data for identification and investigation reasons. Law enforcement and forensic departments use AFIS to help solve ... Read More

Optimizing MySQL tables is a crucial step in improving the performance and efficiency of your database. By employing effective optimization techniques, you can enhance query execution speed, reduce storage requirements, and optimize resource utilization. This article explores various strategies and best practices to optimize MySQL tables, allowing you to maximize the performance of your database-driven applications. In this guide, we will discuss the importance of analyzing table structure and design, selecting appropriate data types, and normalizing the database schema. We will also delve into indexing strategies, including identifying indexing opportunities and optimizing indexes for query performance. Additionally, we will explore ... Read More

What is Airtable? Airtable is an online software which can be used to make and share relational databases. The user interface is simple and attractive because of its colorfulness. The tool helps you to make a database within a few minutes. The information can be stored, organized, and shared easily. There is no need to learn any scripting language or SQL to make a database and retrieve data. Price Plans of Airtable There are four price plans and the details can be found in the table below: Plan Cost Free $0 per seat per month ... Read More