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Changing Data Scheme in JavaScript

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by Abdul Rawoof A R dot icon Updated: Mar 2, 2023

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A simple schema is just a map of keys and types: which is the same as using a type of property: a schema can also be a map between keys and default values in JavaScript, and the Schema is of three types: Logical Schema, Physical Schema, and view Schema. 

  • Logical Schema: it describes the database design at the logical level in JavaScript. 
  • Physical Schema: it describes the database design at the physical level in JavaScript. 
  • View Schema: it describes the design of the database at the view level in JavaScript. 


In JavaScript, the Schema is nothing, but it is a new way of describing object schemas and has a clean and simple syntax. It can serialize to or from the popular JSON schema format; the typical use case is declarative object validation. An example of changing the data schema is the Schema changes to the database's structure, such as adding a column to a table and changing the datatype of a column in a table, then adding a new table, etc. 


Here is an example of how to change the data scheme in JavaScript:

Fig : Preview of the output that you will get on running this code from your IDE.

Code

How can I change data scheme in javascript?

JavaScriptdotLines of Code : 14dotLicense : Strong Copyleft (CC BY-SA 4.0)

var obj = {"house":{"subname1":{"active":true,"address":"123 street"},"subname2":{"active":true,"address":"123 street"}},"business":{"example":{"active":true,"address":"123 street"}}};

var result = [];
Object.keys(obj).forEach((type) => {
  Object.keys(obj[type]).forEach((subtype) => {
    result.push({
        type : type,
        subtype : subtype,
        ...obj[type][subtype]
    });
  });  
});

console.log(result);

Instructions

Follow the steps carefully to get the output easily.

  1. Install JavaScript ES6 code snippet and Code Runner from Extension on your IDE(We use Visual Studio Code).
  2. Copy the snippet using the 'copy' and create one new file filename.js(eg.test.js) then paste the code in that JavaScript file.
  3. Save the file and run the file using run button to generate the output.


I hope you found this useful.


I found this code snippet by searching for 'How can I change data scheme in javascript' in kandi. You can try any such use case!

Environment Tested

I tested this solution in the following versions. Be mindful of changes when working with other versions.

  1. The solution is created and tested in Visual Studio Code 1.74.1.
  2. JavaScript ES6 Code Snippet version v1.8.0.
  3. Code Runner version v0.11.8.


Using this solution, we are able to change data scheme in javascript with simple steps. This process also facilities an easy way to use, hassle-free method to create a hands-on working version of code which would help us to change data scheme in javascript.

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