Adomkay / sql-basic-operations-lab-nyc-career-ds-062518

SQL Solar System Lab

NASA wants to go to Mars! Before they build their rocket, NASA needs to track information about all of the planets in the Solar System. Use SQL to help NASA build a database that stores all of this important information.

Objectives

1. Use the CREATE TABLE command to create a table with various data types
2. Use the ALTER TABLE command to add a column to an existing table
3. Use the INSERT INTO command to insert data (i.e. rows) into a database table
4. Use the UPDATE command to change the value of a cell in a database table
5. Use the DELETE FROM command to remove data (i.e. rows) from a database table

Part 1: Table setup

Create a table

In the create.sql file, use the CREATE TABLE command to create a table called planets. Remember, your statement should look like the following:

CREATE TABLE table_name (
   # column_names and data types here
);

NASA is interested in comparing each planet across several characteristics. They want to know each planet's name, color, number of moons, and mass (relative to earth). Your columns should be the following types:

column	type
id	integer
name	text
color	text
num_of_moons	integer
mass	real

Make sure to set the id column as the table's primary key.

Alter the table

NASA notices that several of the planets have rings around them. However, we do not have a column to keep track of this information. In the alter.sql file, use the ALTER TABLE statement to add a column called rings with a data type of boolean to the planets table.

Part 2: Add and remove data

Add data to the table

In the insert.sql file, input data for the nine planets that constitute the Solar System using the INSERT INTO command. The relevant information is provided in the table below:

name	color	num_of_moons	mass	rings
Mercury	gray	0	0.55	no
Venus	yellow	0	0.82	no
Earth	blue	1	1.00	no
Mars	red	2	0.11	no
Jupiter	orange	53	317.90	no
Saturn	hazel	62	95.19	yes
Uranus	light blue	27	14.54	yes
Neptune	dark blue	14	17.15	yes
Pluto	brown	5	0.003	no

Refer to the SQLite3 documentation to remember how to express boolean values in SQLite3.

Update table data

NASA has confirmed that Jupiter has another 15 moons! Write an UPDATE command in update.sql so that Jupiter has 68 moons instead of 53.

Hint: you probably need to use a WHERE statement to accomplish this task.

Remove data from the table

Wait just a moment! NASA decided that Pluto is no longer a planet. In the delete.sql file, remove Pluto from the table using the DELETE FROM command.

Summary

Congratulations! NASA is one step closer to embarking upon its mission to Mars. In this lab, we created a table to track all the planets in the solar system, altered the table to include another column, inserted values to populate the table, and we deleted data from the table.