INTRODUCTION TO SQL COMMANDS: A Database is a systematic collection of data. Database systems are used to store, access, delete, or to systematically organize data in a database. Article will take us through DML-UPDATE command. Consider a cafeteria, which provides snacks and other eatable item to its customers. Traditionally, the snacks, juice, and other items …
SQL (Structure query language) is mainly termed as a domain-specific language. A domain specific language is a specialized computer language used for a particular domain. rdbms concepts are very important to get our basics and vision clear. RDBMS uses SQL language for stream processing. SQL is a set based, and a decorative programming language, and …
SQL is a database language that has commands to create, manipulate etc the database. All the commands can be broadly classified into following categories: DDL Commands DML Commands DCL Commands TCL Commands DDL(Data Definition Language) Commands: Data Definition Language commands in SQL are used to define the database schema. These commands deal with description of …
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SQL Aggregate functions are described in this article. SQL functions are like average , sum , count , first last etc. SQL Aggregate functions Consider the following Student table with ID, Marks, Age,Name as columns. +—-+——-+—–+———–+ | Table Name – Student | +—-+——-+—–+———–+ | ID | MARKS | AGE | NAME | +—-+——-+—–+———–+ | 1 …
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In SQL, there are a lot of library functions used while working with Date in Databases. The given below are the list of SQL date functions along with examples. SQL Date Functions NOW(): NOW() function returns the current date and time of the system. Example: Query: Select NOW (); Result: 2018-14-21 15:08:05 CURDATE(): CURDATE() functions …
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