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Day 96 of 100 Days of Code & Scrum: Stringed Along by MySQL

Hello there, everyone!

TIL, SQL index starts with 1, not with 0. I'm really surprised at this fact, because I'm way too used to counting starting from 0 when programming. I find myself easily thrown off when mentally calculating index-related stuff in SQL, because of 1-based index. Either way, it's just something I need to take into account.

That aside, I spent most of my free time today learning string-related functions in MySQL. I didn't learn all of the functions in the MySQL string functions documentation, but I familiarized them. What I focused on were the most commonly used string functions.

Anyway, let's move on to my daily report!


I did basic CRUD practice exercises in MySQL to get more used to them.



  • I learned how to utilize the most commonly used string functions in MySQL such as:
    • CONCAT - concatenates multiple strings together.
    • UPPER - converts a string to uppercase.
    • LOWER - converts a string to lowercase.
    • REVERSE - reverses the order of characters in a string.
    • REPLACE - takes in a string, and replaces substring with another substring.
    • SUBSTRING - retrieves a substring from a string, starting and ending indices can be selected.
    • CHAR_LENGTH - returns the number of characters in a string.
  • skimmed through MySQL string functions documentation.
  • continued Colt Steele's MySQL course.


Thank you for reading! Have a good day!

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Resources/Recommended Readings


This is not a guide, it is just me sharing my experiences and learnings. This post only expresses my thoughts and opinions (based on my limited knowledge) and is in no way a substitute for actual references. If I ever make a mistake or if you disagree, I would appreciate corrections in the comments!

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Top comments (2)

angelgrcom profile image
Angel Garrigues

Thanks for sharing your experience. It's really inspiring and you're going to finish the challenge this week!

Would you recommend PSM I certification for people with no work experience?

I think those titles could be a best fit for a senior role that needs to manage a team. With no work experience a good book should be a best investment, but I could be wrong. Have a nice weekend!

rammina profile image

Thank you for your kind words!

It doesn't hurt to get the PSM I certification if you intend to be a Scrum Master later on or just want to learn more about Scrum, since the certification doesn't expire. It also allows you access to junior Scrum Master positions (albeit kind of rare).

Scrum Masters are not managers, but facilitators. They are not supposed to have authoritative power, just that they help teams utilize the Scrum framework properly.

Personally, I think it can be beneficial if you want to work with a Scrum team. However, it's more important to improve as a developer first.