Introduction To SQL

INTRODUCTION TO SQL

What is a Database?

Tables & Keys

Sql Basics

Mysql Windows Installation

Mysql Mac Installation

Creating Tables

Inserting Data

Constraints

Update & Delete

Basic Queries

Company Database Intro

Creating Company Database

More Basic Queries


-- Find all employees
SELECT *
FROM employee;

-- Find all clients
SELECT *
FROM clients;

-- Find all employees ordered by salary
SELECT *
from employee
ORDER BY salary ASC/DESC;

-- Find all employees ordered by sex then name
SELECT *
from employee
ORDER BY sex, name;

-- Find the first 5 employees in the table
SELECT *
from employee
LIMIT 5;

-- Find the first and last names of all employees
SELECT first_name, employee.last_name
FROM employee;

-- Find the forename and surnames names of all employees
SELECT first_name AS forename, employee.last_name AS surname
FROM employee;

-- Find out all the different genders
SELECT DISCINCT sex
FROM employee;

-- Find all male employees
SELECT *
FROM employee
WHERE sex = 'M';

-- Find all employees at branch 2
SELECT *
FROM employee
WHERE branch_id = 2;

-- Find all employee's id's and names who were born after 1969
SELECT emp_id, first_name, last_name
FROM employee
WHERE birth_day >= 1970-01-01;

-- Find all female employees at branch 2
SELECT *
FROM employee
WHERE branch_id = 2 AND sex = 'F';

-- Find all employees who are female & born after 1969 or who make over 80000
SELECT *
FROM employee
WHERE (birth_day >= '1970-01-01' AND sex = 'F') OR salary > 80000;

-- Find all employees born between 1970 and 1975
SELECT *
FROM employee
WHERE birth_day BETWEEN '1970-01-01' AND '1975-01-01';

-- Find all employees named Jim, Michael, Johnny or David
SELECT *
FROM employee
WHERE first_name IN ('Jim', 'Michael', 'Johnny', 'David');



More Basic Queries-Code

Functions

Wildcards

Union

Joins

Nested Queries

On Delete

Triggers

Er Diagrams Intro

Designing An Er Diagram

Er Diagram Mapping

This course covers the basics of working with SQL. Work your way through the videos/articles and I'll teach you everything you need to know to interact with database management systems and create powerful relational databases!

SQL - Database Programming Language

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