On this article, we’ll stroll throughout the strategy of changing a JSON string into an SQL Question in order that your information will also be inserted right into a database.

Anatomy of JSON Items and SQL Queries

Right here’s an instance of a JSON object:

{
"title": "John",
"age": 30,
"town": "New York"
}

Within the code above, we’ve a JSON object with 3 attributes: title, age, and town. Every characteristic has a corresponding worth.

Right here’s an instance of an SQL question:

SELECT * FROM customers WHERE age > 18;

On this instance, we’re deciding on all data from the customers desk the place the age is bigger than 18.

The way to Convert a JSON String to a JSON Object after which into an SQL Question

To transform a string to JSON after which into an SQL question, we wish to apply those steps:

1. Parse the JSON string right into a JSON object
2. Extract the values from the JSON object
3. Construct an SQL question the use of the extracted values

Let’s undergo every step intimately.

Parse the string right into a JSON object

To parse the string right into a JSON object, we will use the JSON.parse() way. This technique takes a string as enter and returns a JSON object:

const jsonString = '{"title":"John","age":30,"town":"New York"}';
const jsonObj = JSON.parse(jsonString);
console.log(jsonObj);

On this instance, we’ve a JSON string and we’re the use of the JSON.parse() way to parse it right into a JSON object. The output of this code will likely be as follows:

{
"title": "John",
"age": 30,
"town": "New York"
}

As soon as we’ve the JSON object, we wish to extract the values from it. We will be able to do that via getting access to the homes of the JSON object like so:

const title = jsonObj.title;
const age = jsonObj.age;
const town = jsonObj.town;
console.log(title, age, town);

On this instance, we’re extracting the values of the title, age, and town homes from the JSON object. The output of this code will likely be as follows:

John 30 New York

Now that we’ve extracted the values from the JSON object, we will use them to construct an SQL question:

const sqlQuery = `INSERT INTO customers (title, age, town) VALUES ('${title}', '${age}', '${town}')`;
console.log(sqlQuery);

On this instance, we’re construction an SQL question to insert a brand new report into the customers desk with the values extracted from the JSON object. The output of this code will likely be as follows:

INSERT INTO customers (title, age, town) VALUES ('John', '30', 'New York')

Changing a JSON string into an SQL question is a commonplace activity in internet construction. By way of following the stairs defined right here, you’ll simply paintings with JSON information and manipulate it in order that it may be inserted into your SQL database.