Firebase Firestore Tutorial #7 - Ordering Data

Hey gang, in this Firebase Firestore tutorial I'll show you how we can use the orderBy method to order our data before we retrieve it. I'll also discuss indexes a little.

🐱‍💻 Course Links:

[SaintPepsiSanCoca]

Your tutorials are just so easy to follow and you explain everything it's very pleasant thanks!

[abe]

I believe the way Firebase sorts data is by using the ASCII values of the characters. That's why the words with capital letters came first. ASCII of A-Z = 65-90 and a-z = 97-122.

[seanl]

These tutorials actually work and are the best ones to use for the HTML CSS and Javascript Techstack. There isn't a good firebase course on the site Udemy yet for this you should create a masterclass on there. You could make a little money on the side too for those who want to enroll in it. But It's amazing you're posting them on here for everyone bravo man, you saved me from my confusion and I understand firebase a lot more now.

[devilzwishbone]

For those viewers with limited experience in programming and want to know why the capitalisation comes before lower case, it is all to do with the ASCII table.
In which each character is defined as 1 byte of data, accounting for 128 (0 though to 127) standard and 255 (128 though to 255) when the extended ascii is included.

The letter A as an upper case is represented as 065 (Binary: whilst lower case is 097 (Binary: 01100001)
As you can tell from the binary, these numbers are not randomly choosen, they were done to
Since 65 comes before 97, then all upper case letters will be processed first followed by lower cases second.

A byte's maximum value is 2 to the power of 8 which is 256

The solution would be to pre-process the data
Ie, if you 100% know that the data for that cell or field, is going to be a noun, then you would simply write a function that converts the string into a format that represents a noun, this being a book title would contain a capital letter for the first letter, followed by a capilisation per character after each space character
You would then return this value and store it in the NoSQL

[TheChodex]

This looks pretty cool! Thank you for making this tutorial Shaun!

[fwhsv]

Hi, I'm using a dropdown menu to select the field you want to order your data by. But actually it doesn't work, even if I do have an index for each option. Im saving the field value in a variable, which I put into the OrderBy statement. My question is, how I can dynamically reload the data, ordered by the value of my variable? :)

[Shubh_QR]

Thanks bro for the video it solved my problem, Your videos are always very very

[johongirrahimov]

Are not you and Web Dev Simplified grand-children of Feynman? Coz both of you are GREAT EXPLAINERS!

[Elduque]

Been waiting for this like the next release of god of war

[Programming-Fun-With-Hima]

At last, you're using vs code, hahaha
You're a very cool teacher Shaun, I really love you <3

[INKWEON]

Thanks!! It's perfect Tutorial!!
And I have a question! How to list in the order of time?

[pixl__photography]

How to order based on latest to oldest?? Any method for that??

[usamamuhammad]

Can i use 2 order by statements in on one collection like this:
.orderBy("timeStamp", "desc").orderBy("votes", "Asc")

[eugeniogonzato]

Your video are so interesting and so celar, I love you

[dominikfrackowiak]

Hello everyone, I need to sort the data stored in a collection by the frequency of occurrence of words used in that collection. Is that possible in firebase? Any ideas how to do that?

[Elyx]

You forgot to mention order by and >=, it's a very specific and important case

[VitechOrg]

Love your videos!, anyone here know how to export Firebase collection or document data to JSON and use a npm package like vue to json-excel for a reporting feature? Maybe adding a Video Tut to this effect on this series? Keep up the great tutorials Shaun!

[cnx]

Bro firebase database descending order data query

[amonafuad]

I liked your accent more than the lesson. Can you make videos about English tutorials?

[DiogoCezarTeixeiraBatista]

Hello my Friend ;) I'm from Brazil, and i would like to thanks for all your vídeos, they are amazing. Ninja, i'm following this example of mario plan, and i'm trying to get ordered data for display at dashboard. I'm trying like this: { collection: "projects", orderBy: [['name', 'asc']] } but, it does not work, do you have some trick for this? Thanks a lot! <3