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23 kwi 2015 · SQL is a language used to define, manipulate, and control relational databases. It has four main components: DDL for defining schemas; DML for manipulating data within schemas; DCL for controlling access privileges; and DQL for querying data.
- Structured Query Language (SQL)
Structured Query Language (SQL) is a standard language used...
- Structured query language
This document provides an overview of Structured Query...
- Structured Query Language (SQL)
1 lis 2018 · Structured Query Language (SQL) is a standard language used to create, retrieve, and manage data in relational databases. SQL allows users to define tables, manipulate data within those tables through insert, update, delete statements, and retrieve data through select statements.
27 wrz 2013 · This document provides an overview of Structured Query Language (SQL). It describes how SQL was developed from research on relational databases in the 1970s. Key events included the creation of SEQUEL in 1974 and its evolution into SQL.
In this chapter, you will learn: The basic commands and functions of SQL How to use SQL for data administration (to create tables and indexes) How to use SQL for data manipulation (to add, modify, delete, and retrieve data) How to use SQL to query a database for useful information.
Structured Query Language The main reference of this presentation is the textbook and PPT from : Elmasri & Navathe, Fundamental of Database Systems, 4. Chapter 8 Part 1 SQL-99 Schema Definition, Constraints, Queries, and Views.
This document provides an introduction to structured query language (SQL) including its basic commands and functions. It discusses how SQL is used for data administration to create tables, indexes and views, and for data manipulation such as adding, modifying, deleting and retrieving data.
It discusses SQL functions for data definition like creating tables, indexes and views, and data manipulation like inserting, updating, deleting and retrieving data. It also covers basic SQL commands, data types, constraints, indexes and how to query a database using conditional restrictions.
