Database war
Mysql & Mongodb
Queries

Database war Mysql & Mongodb Queries

Carlos Rivas's photo
Carlos Rivas

Published on Mar 8, 2021

3 min read

Hey my friends, a new post about this war. I don't know which is better, but I'll try to figure it out. I hope y'all enjoy this series. Here we go!

This time I'm going to talk about how to do Queries

Mysql

Create a database

CREATE DATABASE IF NOT EXISTS onepiece;

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Create a table

CREATE TABLE crews (
     id INT(6) UNSIGNED AUTO_INCREMENT PRIMARY KEY,
     name VARCHAR(50) NOT NULL,
     ship VARCHAR(50) NOT NULL,
     captain VARCHAR(50) NOT NULL
     );

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Insert

INSERT INTO crews (name, ship, captain) VALUES
    -> ('Straw Hat Pirates','Sunny','Luffy');

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Find

SELECT * FROM crews;
SELECT * FROM crews WHERE captain = 'Luffy';

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Update

UPDATE crews
    -> SET ship = 'Sunny2'
    -> WHERE captain = 'Luffy';

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Delete

DELETE FROM crews WHERE captain = 'Kaido';

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MongoDB

Create a database, the database you can see in the list when you create a collection.

use onepiece

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Create a collection

db.createCollection('crews')

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Insert

 db.crews.insert(
    {
        "name":"Straw Hat Pirates",
        "ship":"Sunny",
        "captain":"Luffy"
    }
 )

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Find

db.crews.find()
db.crews.find({"captain":"Luffy"})

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Update

db.crews.findOneAndUpdate({"captain":"Luffy"}, { $set: {"ship":"Sunny2"} })

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Delete

db.crews.findOneAndDelete({"captain":"Kaido"})

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Conclusion

  • Structure: Mysql is necessary to give a name to each field, but MongoDB is not necessary it's enough.
  • Mysql has tables and MongoDB has collections.
  • Mysql has rows and columns and MongoDB has documents.

Would you like to learn about advances queries in databases?

I hope you enjoy my post and remember that I am just a Dev like you!

 
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