Rename Columns In Views
Create Table
- Create table called adventurers
CREATE TABLE adventurers (
- string variable
name varchar(255),
- integer variable
age int,
- string variable
race varchar(255),
- string variable
weapon varchar(255)
)Insert Rows
- Insert into the table adventurers
INSERT INTO adventurers (name, age, race, weapon)
VALUES ('Fjoak Doom-Wife', 28, 'Human', 'Axe'),
('Alooneric Cortte', 29, 'Human', 'Bow'),
('Piperel Ramsay', 35, 'Elf', 'Bow'),
('Casimir Yardley', 14, 'Elf', 'Bow')Create View
- Create view called elves containing with the column's renamed:
- elven_name, elven_age, race, and elven_weapon
CREATE VIEW elves (elven_name, elven_age, race, elven_weapon) AS (
- Select all rows from adventurers table
SELECT * FROM adventurers
- Where the race is elf
WHERE race = 'Elf'
)Retrieve View
- Retrieve all rows from the view Elf
SELECT * FROM elves| elven_name | elven_age | race | elven_weapon |
|---|---|---|---|
| Piperel Ramsay | 35 | Elf | Bow |
| Casimir Yardley | 14 | Elf | Bow |
Python Example for Beginners
Two Machine Learning Fields
There are two sides to machine learning:
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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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