SQLite is a popular open-source relational database management system that is widely used in various applications due to its small size, ease of use, and high reliability. One of the recent features added to SQLite is the JSON1 extension, which allows users to work with JSON data in SQLite.
The JSON1 extension adds several useful functions to SQLite that enable users to extract, manipulate, and query JSON data. One of these functions is the JSON() function, which is used to convert a JSON string to a SQLite value.
Syntax
The syntax for the JSON() function is as follows:
JSON(json_string)
where json_string is a valid JSON string. The function returns a SQLite value that represents the JSON data in the input string.
Example
Here is an example of how to use the JSON() function:
SELECT JSON('{"name": "John", "age": 30}');
This query returns a SQLite value that represents the JSON object {“name”: “John”, “age”: 30}.
The JSON() function can be used in various ways in conjunction with other SQLite functions and operators to manipulate and query JSON data stored in SQLite databases. For instance, you can use the JSON() function with the SQLite LIKE operator to search for specific values in JSON data.
Here is an example that demonstrates how to use the JSON() function with the LIKE operator:
SELECT * FROM my_table WHERE JSON(data) LIKE '%foo%';
This query selects all rows from the my_table table where the data column contains a JSON string that includes the string “foo”.
In conclusion, the JSON() function is a powerful tool in SQLite that enables users to work with JSON data easily and efficiently. Whether you’re working with complex JSON structures or simple key-value pairs, the JSON1 extension provides a variety of functions that make it easy to extract, manipulate, and query JSON data in SQLite databases.
