How to Convert a JSON String into an SQL Query?
Last Updated :
05 Jun, 2024
Improve
JSON to SQL conversion is complicated because both have different structure. but this the help of the article you can easily convert JSON into SQL. We will use JavaScript language for conversion.
Approach: Using JavaScript
- Validate JSON Format.
- Parse the JSON String into a JSON Object
- Extract Values from the JSON Object.
- Concat extract values and develop SQL Query .
Steps to Convert a JSON String into an SQL Query
Step 1: Validate JSON Format.
Ensure your JSON is properly formatted.
[
{"name": "Alice", "age": 28, "city": "Los Angeles"},
{"name": "Bob", "age": 25, "city": "Chicago"},
{"name": "Charlie", "age": 35, "city": "New York"}
]
Step 2: Parse the JSON String into a JSON Object
To parse JSON string to object ,use JSON.PARSE() method .
This method is used exchange data to from a web server .
const jsonString =
'[{"name": "Alice", "age": 28, "city": "Los Angeles"}, {"name": "Bob", "age": 25, "city": "Chicago"}, {"name": "Charlie", "age": 35, "city": "New York"}]';
const jsonArray = JSON.parse(jsonString);
console.log(jsonArray);
Step 3: Extract Values from the JSON Object
Now Iterate through the array . extract the values from each JSON object.
jsonArray.forEach(user => {
const name = user.name;
const age = user.age;
const city = user.city;
console.log(name, age, city);
});
Step 4: Develop SQL Queries with Extracted Values
Now you got extract values and Concatenate the to develop SQL queries .
// JSON string
const jsonString =
'[{"name": "Alice", "age": 28, "city": "Los Angeles"}, {"name": "Bob", "age": 25, "city": "Chicago"}, {"name": "Charlie", "age": 35, "city": "New York"}]';
// Step 2: Parse the JSON string into a JSON object
const jsonArray = JSON.parse(jsonString);
// Step 3 & 4: Extract values from
// the JSON object and develop SQL queries
let sqlQueries = '';
jsonArray.forEach(user => {
const name = user.name;
const age = user.age;
const city = user.city;
const sqlQuery =
`INSERT INTO users (name, age, city) VALUES ('${name}', ${age}, '${city}');`;
sqlQueries += sqlQuery + '\n';
});
// Append the SELECT query to
// display the inserted data
const selectQuery = 'SELECT * FROM users;';
sqlQueries += selectQuery;
// Output the SQL queries
console.log(sqlQueries);
Output
INSERT INTO users (name, age, city) VALUES ('Alice', 28, 'Los Angeles');
INSERT INTO users (name, age, city) VALUES ('Bob', 25, 'Chicago');
INSERT INTO users (name, age, city) VALUES ('Charlie', 35, '...
