SQL.md

Discussion about SQL:

1. What is SQL, and what are some of its primary functions?
2. SQL is a declarative query language, what does that mean?
3. SQL is the industry standart for relational databases, what does a realtional database mean?
4. What is a database management system? and which ones are the most popular?
5. What are some of the most common SQL commands, and how are they used to manipulate data?

Fatima Ali, Iroda Yılmaz, Bara'a Almasri
1- Structured query language (SQL) is a standard language for database creation and manipulation. Sum, Avg, Count, First, last
2-They function in a more general manner and involve giving broad instructions about what task is to be completed, rather than the specifics on how to complete it.
3-A relational database is a collection of data items with pre-defined relationships between them. These items are organized as a set of tables with columns and rows. Tables are used to hold information about the objects to be represented in the database.
4-Database Management Systems (DBMS) are software systems used to store, retrieve, and run queries on data. A DBMS serves as an interface between an end-user and a database, allowing users to create, read, update, and delete data in the database.
5. SELECT - extracts data from a database
UPDATE - updates data in a database
DELETE - deletes data from a database
INSERT INTO - inserts new data into a database
CREATE DATABASE - creates a new database
ALTER DATABASE - modifies a database
CREATE TABLE - creates a new table
ALTER TABLE - modifies a table
DROP TABLE - deletes a table
CREATE INDEX - creates an index (search key)
DROP INDEX - deletes an index