Example 1: sql
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
Example 2: sql
Structured Query Language
Example 3: sql
Structured Query Language
Example 4: SQL
Let's create a database!
Example 5: SQL
CREATE TABLE friends (
id INTEGER,
name TEXT,
birthday DATE
);
INSERT INTO friends (id, name, birthday)
VALUES (1, 'Jane Doe', '1990-05-30');
INSERT INTO friends(id , name , birthday)
VALUES(2 , 'APOORV' , '2000-2-2');
UPDATE friends
SET name = 'Jane Srivastava'
WHERE id = 1;
ALTER TABLE friends
ADD COLUMN email TEXT;
UPDATE friends
SET email = '203029@klsafjls'
where id = 1;
UPDATE friends
SET email = '203029@klsafjls'
where id = 2;
DELETE FROM friends
WHERE id = 1;
SELECT *
FROM friends;
Example 6: sql
SQL - the standard language to communicate with DBMS.
Example 7: sql
SQL is a domain-specific language used in programming and designed for managing
data held in a relational database management system, or for stream processing
in a relational data stream management system.
Example 8: sql
SELECT * FROM STUDENT
Example 9: sql
SQL is used to communicate with a database.
According to ANSI (American National Standards Institute), it is the standard language for relational database management systems.
SQL statements are used to perform tasks such as update data on a database, or retrieve data from a database.
Example 10: sql
SQL stands for:
Structured Query Language
It's language which enables a user to create,
modify and essentially interact with a database.
As a tester we are usually using Data manipulation
language part of SQL
SQL has 2 parts:
1-DATA MANIPULATION LANGUAGE
It is used to add, retrieve or update the data.
= insert, select, update, delete
2-DATA DEFINITION LANGUAGE
It is used to create database schema and can
be used to define some constraints as well.
=create, alter, drop, truncate
create table
create window etc.