uv012
3 months ago
parent
bf84b17f93
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{
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"cells": [
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{
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"cell_type": "markdown",
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"id": "bb4281ad",
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"metadata": {},
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"source": [
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"# Q1. all city names in the Cities table"
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]
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},
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{
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"cell_type": "markdown",
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"id": "ccc16638-bad1-42e2-8004-f225c54cdcb5",
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"metadata": {},
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"source": [
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"SELECT city\\\n",
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"FROM Cities"
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]
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},
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{
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"cell_type": "markdown",
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"id": "dcf23339-e7dd-483b-a043-9bbce4a167d7",
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"metadata": {},
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"source": [
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"# Q2. all cities in Ireland in the Cities table"
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]
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},
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{
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"cell_type": "markdown",
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"id": "26fe320e-1d2d-423e-9fcc-9e3db643fa96",
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"metadata": {},
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"source": [
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"SELECT city\\\n",
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"FROM Cities\\\n",
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"WHERE country = 'Ireland'"
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]
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},
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{
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"cell_type": "markdown",
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"id": "3ca1a291-8adb-4c76-9bec-1d7a67d697da",
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"metadata": {},
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"source": [
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"# Q3. all airport names with their city and country"
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]
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},
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{
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"cell_type": "markdown",
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"id": "0aa54aed-c41f-41e8-ba3e-a99fc9992fb0",
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"metadata": {},
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"source": [
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"SELECT Airports.name, Cities.city, Cities.country\\\n",
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"FROM Airports\\\n",
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"INNER JOIN Cities\\\n",
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"ON Cities.id = Airports.city_id"
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]
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},
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{
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"cell_type": "markdown",
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"id": "e53bf50d-d4c3-4c1d-9a82-ad229e946bb4",
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"metadata": {},
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"source": [
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"# Q4. all airports in London, United Kingdom"
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]
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},
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{
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"cell_type": "markdown",
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"id": "99aca6e9-27c2-4422-be1b-4658e8309ac6",
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"metadata": {},
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"source": [
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"SELECT Airports.name\\\n",
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"FROM Airports\\\n",
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"INNER JOIN Cities\\\n",
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"ON Cities.id = Airports.city_id\\\n",
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"WHERE Cities.city = 'London'\\\n",
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"AND Cities.Country = 'United Kingdom',"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "81fa9a71-5bb2-4489-ad5e-fcdab7362ad2",
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"metadata": {},
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"outputs": [],
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"source": []
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}
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],
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"metadata": {
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"kernelspec": {
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"display_name": "Python 3 (ipykernel)",
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"language": "python",
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"name": "python3"
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},
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"language_info": {
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"codemirror_mode": {
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"name": "ipython",
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"version": 3
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},
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"file_extension": ".py",
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"mimetype": "text/x-python",
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"name": "python",
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"nbconvert_exporter": "python",
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"pygments_lexer": "ipython3",
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"version": "3.13.4"
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}
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},
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"nbformat": 4,
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"nbformat_minor": 5
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}
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@ -0,0 +1,134 @@
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{
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"cells": [
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{
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"cell_type": "markdown",
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"id": "82f08ef0",
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"metadata": {},
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"source": [
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"## Q1. List all the tables in the db"
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]
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},
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{
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"cell_type": "markdown",
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"id": "fd29416d-0221-4047-9b2d-4a012cd184c0",
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"metadata": {},
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"source": [
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"SELECT name\\\n",
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"FROM sqlite_master\\\n",
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"WHERE type='table'\\\n",
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"AND name\\\n",
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"NOT LIKE 'sqlite_%'"
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]
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},
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{
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"cell_type": "markdown",
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"id": "4ef19ecc-81f9-41f9-9889-914368a33d96",
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"metadata": {},
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"source": [
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"- dept\n",
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"- emp\n",
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"- proj"
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]
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},
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{
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"cell_type": "markdown",
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"id": "7b63ac95-7664-4dc5-88ac-f77935091fab",
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"metadata": {},
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"source": [
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"## Q2. dept table_info"
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]
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},
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{
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"cell_type": "markdown",
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"id": "2ca49b91-528b-4902-ad65-c3fc181faca7",
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"metadata": {},
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"source": [
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"PRAGMA table_info(dept)"
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]
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},
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{
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"cell_type": "markdown",
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"id": "91fab8d2-ce8c-4651-af24-d93f1913783c",
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"metadata": {},
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"source": [
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"## Q3. emp table_info"
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]
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},
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{
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"cell_type": "markdown",
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"id": "5b0132dd-ba43-429e-acc9-f1a5ae7e2b1b",
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"metadata": {},
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"source": [
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"PRAGMA table_info(emp)"
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]
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},
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{
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"cell_type": "markdown",
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"id": "f8b71a48-0a18-4197-aee5-f2d7f22d65a5",
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"metadata": {},
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"source": [
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"## Q4. proj table_info"
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]
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},
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{
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"cell_type": "markdown",
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"id": "a966aa66-0f31-457f-a64e-854e894e9eed",
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"metadata": {},
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"source": [
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"PRAGMA table_info(proj)"
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]
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},
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{
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"cell_type": "markdown",
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"id": "7d534edf-37b4-409a-b778-b9d0e9e67cd9",
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"metadata": {},
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"source": [
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"## Q5. Create a table with emp.ENAME, dept.DNAME, proj.PROJID, Managers.Manager"
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]
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},
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{
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"cell_type": "markdown",
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"id": "afa75542-3fdb-4c0f-bd92-3c8fbbdbb56c",
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"metadata": {},
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"source": [
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"SELECT emp.ENAME, dept.DNAME, proj.PROJID, Managers.Manager\\\n",
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"FROM dept\\\n",
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"INNER JOIN emp\\\n",
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" on dept.DEPTNO = emp.DEPTNO\\\n",
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"INNER JOIN proj\\\n",
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" ON emp.EMPNO = proj.EMPNO\\\n",
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"INNER JOIN Managers\\\n",
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" ON Managers.Employee = emp.ENAME"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "1514a0b2-97e6-4910-89a4-1292c4c24944",
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"metadata": {},
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"outputs": [],
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"source": []
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}
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],
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"metadata": {
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"kernelspec": {
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"display_name": "Python 3 (ipykernel)",
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"language": "python",
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"name": "python3"
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},
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"language_info": {
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"codemirror_mode": {
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"name": "ipython",
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"version": 3
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},
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"file_extension": ".py",
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"mimetype": "text/x-python",
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"name": "python",
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"nbconvert_exporter": "python",
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"pygments_lexer": "ipython3",
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"version": "3.13.4"
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}
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},
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"nbformat": 4,
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"nbformat_minor": 5
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}
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SELECT emp.ENAME, dept.DNAME, proj.PROJID, Managers.Manager
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FROM dept
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INNER JOIN emp
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on dept.DEPTNO = emp.DEPTNO
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INNER JOIN proj
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ON emp.EMPNO = proj.EMPNO
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INNER JOIN Managers
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ON Managers.Employee = emp.ENAME
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