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88 changes: 60 additions & 28 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -28,7 +28,6 @@ In this lab, you will practice SQL by working with a PostgreSQL database. You wi

<br>


## Requirements

- Fork this repo
Expand Down Expand Up @@ -56,7 +55,6 @@ Since we will be querying our database from `psql`, you will need to copy/paste

In the `queries.md` file, you will find the instructions about the query you need to perform in each iteration and a space to fill the answer.


### Example

Here is an example of how you should paste your SQL queries in the `queries.md` file for each iteration:
Expand Down Expand Up @@ -121,47 +119,81 @@ You already know how this goes, so let's start running some queries on our datab
```js
[
{
name: 'solid',
owner: 'solidjs',
description: 'A declarative, efficient, and flexible JavaScript library for building user interfaces.',
name: "solid",
owner: "solidjs",
description:
"A declarative, efficient, and flexible JavaScript library for building user interfaces.",
stars: 10700,
url: 'solidjs.com',
url: "solidjs.com",
releases: 194,
licence: 'MIT License',
licence: "MIT License",
used_by: 624,
contributors: 73,
main_technology: 'typescript',
type: 'UI Library',
release_date: '2011-08-13'
main_technology: "typescript",
type: "UI Library",
release_date: "2011-08-13",
},
{
name: 'chartjs',
owner: 'chartjs',
description: 'Simple HTML5 Charts using the canvas tag.',
name: "chartjs",
owner: "chartjs",
description: "Simple HTML5 Charts using the canvas tag.",
stars: 54700,
url: 'chartjs.org',
url: "chartjs.org",
releases: 85,
licence: 'MIT License',
licence: "MIT License",
used_by: 414000,
contributors: 377,
main_technology: 'javascript',
type: 'Charts Library',
release_date: '2011-11-02'
}
main_technology: "javascript",
type: "Charts Library",
release_date: "2011-11-02",
},
];
```

<br>

2. Get **all the fields** of the library that was **released earliest** (first). <br> <br>
3. Get **all the fields** of the library that was **released most recently** (last). <br> <br>
4. All the libraries released **before 2015**. <br> <br>
5. Get the `name` and the `release_date` of the libraries **without a licence**. <br> <br>
6. Get the `name` and the `stars` from all **CSS Framework** libraries. <br> <br>
7. Get the `name` of the libraries where the main technology is **Typescript**. <br> <br>
8. Get the `name` and the `type` of all the libraries with **more than 1000 contributors**. <br> <br>
9. Get the **total** number of `stars` of **all the libraries**. <br> <br>
10. Get the **average** number of `contributors` for **all the libraries**. <br> <br>
2. | Get **all the fields** of the library that was **released earliest** (first). <br> | name | owner | description | stars | url | releases | licence | used_by | contributors | main_technology | type | release_date |
| ---------------------------------------------------------------------------------- | ------- | --------------------------------------------------------------------------------------- | ----------- | ----------- | --- | ----------- | ------- | ------- | ------------ | --------------- | ---------- | ------------ |
| solid | solidjs | A declarative, efficient, and flexible JavaScript library for building user interfaces. | 10700 | solidjs.com | 194 | MIT License | 624 | 73 | typescript | UI Library | 2011-08-13 | <br> |
3. | Get **all the fields** of the library that was **released most recently** (last). <br> | name | owner | description | stars | url | releases | licence | used_by | contributors | main_technology | type | release_date |
| -------------------------------------------------------------------------------------- | --------- | --------------------------------------------------------------------------- | ----------- | ------------- | ---- | ----------- | ------- | ------- | ------------ | ------------------ | ---------- | ------------ |
| chakra-ui | chakra-ui | ⚡️ Simple, Modular & Accessible UI Components for your React Applications. | 20300 | chakra-ui.com | 2073 | MIT License | 23100 | 429 | typescript | Components Library | 2018-08-12 | <br> |
4. | All the libraries released **before 2015**. <br> | name | owner | description | stars | url | releases | licence | used_by | contributors | main_technology | type | release_date |
| ------------------------------------------------ | -------------- | ----------------------------------------------------------------------------------------- | ----------- | ------------------------------------------ | --- | ----------- | ------- | ------- | ------------ | ------------------ | ---------- | ------------ |
| react | facebook | A declarative, efficient, and flexible JavaScript library for building user interfaces. | 174000 | reactjs.org | 138 | MIT License | 7400000 | 1501 | javascript | SPA library | 2014-08-23 |
| ant-design | ant-design | VAn enterprise-class UI design language and React UI library. | 34600 | ant.design | 474 | MIT License | 233000 | 1469 | typescript | Components Library | 2012-12-16 |
| victory | FormidableLabs | A collection of composable React components for building interactive data visualizations. | 9100 | http://formidable.com/open-source/victory/ | 214 | null | 9700 | 148 | javascript | Charts Library | 2014-08-08 |
| pug | pugjs | Pug – robust, elegant, feature rich template engine for Node.js. | 20300 | pugjs.org | 244 | MIT License | 348000 | 253 | javascript | Template engine | 2012-02-07 |
| hbs | pillarjs | Express view engine wrapper for Handlebars. | 1500 | pugjs.org | 44 | MIT License | null | 25 | javascript | Template engine | 2013-08-25 |
| moment | moment | Parse, validate, manipulate, and display dates in javascript. | 45900 | momentjs.com | 84 | null | 2500000 | 590 | javascript | Date library | 2012-10-08 |
| solid | solidjs | A declarative, efficient, and flexible JavaScript library for building user interfaces. | 10700 | solidjs.com | 194 | MIT License | 624 | 73 | typescript | UI Library | 2011-08-13 |
| chartjs | chartjs | Simple HTML5 Charts using the canvas tag. | 54700 | chartjs.org | 85 | MIT License | 414000 | 377 | javascript | Charts Library | 2011-11-02 | <br> |
5. | Get the `name` and the `release_date` of the libraries **without a licence**. <br> | name | release_date |
| ---------------------------------------------------------------------------------- | ---------- | ------------ |
| victory | 2014-08-08 |
| moment | 2012-10-08 | <br> |
6. Get the `name` and the `stars` from all **CSS Framework** libraries. <br>
| name | stars |
| ----------- | ------ |
| bootstrap | 153000 |
| materialize | 36600 | <br>
7. | Get the `name` of the libraries where the main technology is **Typescript**. <br> | name |
| --------------------------------------------------------------------------------- | ---- |
| styled-components |
| ant-design |
| chakra-ui |
| solid | <br> |
8. | Get the `name` and the `type` of all the libraries with **more than 1000 contributors**. <br> | name | type |
| --------------------------------------------------------------------------------------------- | ------------------ | ---- |
| react | SPA library |
| ant-design | Components Library |
| bootstrap | CSS Framework | <br> |
9. | Get the **total** number of `stars` of **all the libraries**. <br> | sum |
| ------------------------------------------------------------------ | ---- |
| 783300 | <br> |
10. | Get the **average** number of `contributors` for **all the libraries**. <br> | avg |
| ---------------------------------------------------------------------------- | ---- |
| 542.5384615384615385 | <br> |
11. Update the `licence` field of the **libriaries without a licence** to store `'unknown'` instead of `NULL`. <br> <br>
12. Update the `used_by` field of the **libraries that don't have it specified** to store `'unknown'` instead of `NULL`. <br> <br>
13. Update all the records to **capitalize the string** provided in the `main_technology` field. <br> <br>
Expand Down