Outer Join Tables
Create Table Of Adventurers
- Create table called adventurers
CREATE TABLE adventurers (
- string variable
name varchar(255),
- integer variable
age int,
- string variable
race varchar(255)
)Create Table Of Adventurer’s Equipment
- Create table called equipment
CREATE TABLE equipment (
- string variable
name varchar(255),
- string variable
clothes varchar(255),
- string variable
weapon varchar(255)
)Insert Rows Into Adventurers Table
INSERT INTO adventurers (name, age, race)
VALUES ('Dallar Woodfoot', 25, 'Elf'),
('Cordin Garner', 29, 'Elf'),
('Keat Knigh', 24, 'Dwarf'),
('Colbat Nalor', 124, 'Dwarf')Insert Rows Into Equipment Table
INSERT INTO equipment (name, clothes, weapon)
VALUES ('Dallar Woodfoot', 'Leather Armor', 'Axe'),
('Keat Knigh', 'Robe', 'Bow'),
('Tasar Keynelis', 'Tunic', 'Axe'),
('Sataleeti Iarroris','Chainmail', 'Axe')Outer Join Tables
- Return the name of people from the adventurers table, age, race, clothes, and weapon
SELECT adventurers.name, age, race, clothes, weapon FROM adventurers
- Outer join with the equipment table
FULL OUTER JOIN equipment
- Using the name as the merge key contained in both tables
ON (adventurers.name = equipment.name)| name | age | race | clothes | weapon |
|---|---|---|---|---|
| Dallar Woodfoot | 25 | Elf | Leather Armor | Axe |
| Cordin Garner | 29 | Elf | NULL | NULL |
| Keat Knigh | 24 | Dwarf | Robe | Bow |
| Colbat Nalor | 124 | Dwarf | NULL | NULL |
| NULL | NULL | NULL | Tunic | Axe |
| NULL | NULL | NULL | Chainmail | Axe |
Python Example for Beginners
Two Machine Learning Fields
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- Theoretical Machine Learning: This is about math and abstraction and idealized scenarios and limits and beauty and informing what is possible. It is a whole lot neater and cleaner and removed from the mess of reality.
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