JSON Tutorial for Beginners - What is It and How to Use It?

In this json tutorial for beginners I'll walk you through one of the most frequently asked questions in a sql interview related to json: what is json and what is it used for? This video will also explain some json basic concepts, so it will act as a json basic tutorial.

The answer to this question is pretty straightforward - json is a javascript-based object notation and it's used in many DBMS incuding MySQL server, its deviations like MariaDB Server and Percona Server, also within SQL Server, and elsewhere.

MySQL server supports JSON since MySQL 5.7, PostgreSQL supports JSON since PostgreSQL 9.2, and SQL Server supports JSON since SQL Server 2016.

This json tutorial for beginners will also tell you that json allows us to store logs in an easy-to-read format, JSON is perfect if we need to store configuration details, and that JSON can also be used to store analyzed data (e.g. results derived from data, etc.)

JSON is like json javascript - it's very similar to javascript and the json schema is also easy to get the hang of. There is also a specification for building APIs in JSON called the JSON API, and JSON is also frequently compared to xml.

As far as json vs xml is concerned, xml is a little different as it's a metalanguage allowing users to define their own markup languages, but nonetheless, it has its own similarities too.

This JSON tutorial won't tell you, but you can also easily convert json to csv or to any other type of data as well.

Of course, any json project ideas will require many more json basics than shown in this video, so make sure to subscribe and stay tuned for more information!

Now take a look into some of the sql interview questions and answers given below:

Q: What is JSON?
A: JSON is a javascript object notation.

Q: What are some json basic concepts?
A: Watch this video - it should answer this question in detail!

Q: Can you give us a json basic example? How could json be used in databases?
A: Yes, look at the sql query below - this sql query would insert some information relevant to a specific user:
INSERT INTO `users`.`details` (
`username`,
`account_balance`
`messaging_ability`
`attributes`
)
VALUES (
'Demo',
200,
'Yes',
JSON_OBJECT(
"rank",
JSON_ARRAY("Member", "Moderator", "Administrator"),
"forum_areas",
"general",
"banned",
"false",
...
)
);

Q: How to create a database in MySQL?
A: Run a CREATE DATABASE SQL query like shown in this video.

Q: What are sql joins?
A: sql joins are used to combine rows from a couple of tables in a database server.

Q: Is sql injection very dangerous? How to avoid it?
A: Yes, sql injection is a very dangerous security issue. To avoid sql injection, avoid passing user input straight to a database.

Q: How does a sql index improve sql query performance?
A: By using a sql index your database knows how to find your data quickly. If you're searchig for a sql indexes explained video we advise you watch one of our videos on a sql index and its performance.

Q: Explain sql in 100 seconds.
A: SQL is a programming language allowing for work with various RDBMS including mysql server, mariadb server, percona server, and others.

Q: What can I expect in my sql interview?
A: Expect questions related to database availability, security, capacity, and performance. Make sure to watch a couple of our videos to know proper answers to these sql interview questions!

Enjoy the video!

Music:

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