https://github.com/hassanbahati/database-design-and-applications-

https://github.com/hassanbahati/database-design-and-applications-

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• Host: GitHub
• URL: https://github.com/hassanbahati/database-design-and-applications-
• Owner: HassanBahati
• Created: 2022-06-14T14:32:47.000Z (over 2 years ago)
• Default Branch: master
• Last Pushed: 2022-07-07T19:07:41.000Z (over 2 years ago)
• Last Synced: 2024-10-28T09:14:36.732Z (3 months ago)
• Language: Python
• Size: 39.8 MB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
## set environment

.mode csv

## import data file

.import "file" table_name

# get design of table 

.schema

# for sql commands a termination is required

eg SELECT * FROM "table";

## insert a movie into table

INSERT INTO table ("column", "column") VALUES ("value", "value");

## select a particular value from the table

SELECT "column_field" FROM "table" WHERE "Film" LIKE "%see%"

## delete a movie from the table 

DELETE FROM movies WHERE FILM LIKE "%Waitress%"

## update a field

UPDATE movies SET film = "Dear Collins" WHERE Film LIKE "%Dear%";

## save database 

.save moviesList 

## open database

.open moviesList.db

## delte table

DELETE FROM table

## Concatenation of queries - get movies whose id is in the list of ids with genre Romance

SELECT Film FROM movies WHERE id IN (SELECT movie_id FROM genre WHERE genre LIKE "%Romance%")

SELECT genre FROM genre WHERE movie_id = (SELECT id FROM movies WHERE title LIKE "%Zack%");

.txt and .db

get a lst of movies and their genres 

## count through a table

SELECT COUNT(column) FROM table;

## get the time taken by a query

.timer ON

## 

CREATE INDEX title_index ON shows (title);

CREATE INDEX name_index ON people (name)

SELECT title FROM shows WHERE id IN (SELECT person_id FROM stars WHERE person_id IN (SELECT id FROM people WHERE name LIKE "%Thomas%"));

SELECT name FROM people WHERE person_id IN (SELECT person_id FROM stars show_id IN (SELECT id FROM shows WHERE title LIKE "%The Office%"));