Solving Codecademy SQL Questions: Beginner-Friendly SQL Query Tutorial

Are you just starting your SQL journey? 🚀 This video is perfect for beginners who want to master the basics of SQL! In this video, we cover 10 essential SQL questions that are frequently asked in interviews and exams. From simple SELECT statements to understanding WHERE clauses, this guide will give you the confidence to easily tackle basic SQL queries. Whether you’re prepping for an interview or brushing up on SQL skills, this video has got you covered!

In this video, you’ll learn:

Basic SQL syntax and usage
Common SQL queries for data retrieval
How to use WHERE, ORDER BY, and GROUP BY
Simple JOINs and subqueries explained
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---------------------------------SQL Tables to Create-------------------------
create table conversion(id int, value int)
insert into conversion values (1,-56)
insert into conversion values (2,76)
insert into conversion values (3,-84)
insert into conversion values (4,96)
insert into conversion values (5,-47)


create table revenue (Division_id int, years int, revenue int)
insert into revenue values (1,2018,60)
insert into revenue values (1,2021,40)
insert into revenue values (1,2020,70)
insert into revenue values (2,2021,-10)
insert into revenue values (3,2018,20)
insert into revenue values (3,2016,40)
insert into revenue values (4,2021,50)

create table century(id int, years int)
insert into century values (1,1776)
insert into century values (2,2001)
insert into century values (3,1643)
insert into century values (4,1865)
insert into century values (5,1969)

create table even(id int, value int)
insert into even values (1,4)
insert into even values (2,11)
insert into even values (3,57)
insert into even values (4,24)
insert into even values (5,47)

create table people(id int, name varchar(50), age int )
insert into people values(1,'Bob',21)
insert into people values(2,'Sam',19)
insert into people values(3,'Jill',18)
insert into people values(4,'Jim',21)
insert into people values(5,'Sally',19)
insert into people values(6,'Jess',20)
insert into people values(7,'Will',21)

create table greeting (id int, name varchar(50))
insert into greeting values (1,'Bob')
insert into greeting values (2,'Sam')
insert into greeting values (3,'Jill')
insert into greeting values (4,'Sally')
insert into greeting values (5,'Jim')
insert into greeting values (6,'Jess')
insert into greeting values (7,'Will')

create table products(id int, name varchar(50), amount_sold int)
insert into products values (1,'cup',11)
insert into products values (2,'Saucer',22)
insert into products values (3,'Plate',46)
insert into products values (4,'Fork',34)
insert into products values (5,'Spoon',45)
insert into products values (6,'Knife',78)
insert into products values (7,'Mug',23)
insert into products values (8,'Glass',64)
insert into products values (9,'Tumbler',24)


create table border(id int, name varchar(50), country varchar(50))
insert into border values (1,'Bob Smith', 'United States')
insert into border values (2,'Jim Jones', 'China')
insert into border values (3,'Sam White', 'Japan')
insert into border values (4,'Jess Black', 'Canada')
insert into border values (5,'Will Wilson', 'Germany')
insert into border values (6,'Wilson Scott', 'England')
insert into border values (7,'Scott Daniels', 'France')
insert into border values (8,'Daniel Jackson', 'Canada')
insert into border values (9,'Jack Johnson', 'United States')