Check out example codes for "sql". It will help you in understanding the concepts better.

Code Example 1

Dont use SQL it sucks

Code Example 2

SQL - the standard language to communicate with DBMS.

Code Example 3

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 

UPDATE friends 
SET email =  '[email protected]'
where id  = 1; 

UPDATE friends 
SET email =  '[email protected]'
where id  = 2;

DELETE FROM friends 
WHERE id = 1;

FROM friends;

Code Example 4

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.

Code Example 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

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