How Can I Search for Elements Within JSON Arrays in MySQL?

Searching JSON Arrays in MySQL: A Comprehensive Guide

Searching within JSON arrays in MySQL can be achieved using the JSON_CONTAINS function. This function takes the JSON array, an array element, and a path expression as parameters and returns a Boolean value indicating whether the element is present in the array.

Searching for Integers in Arrays

To search for specific integers in an array of integers, use the following syntax:

JSON_CONTAINS(data, 'element', '$')

For example:

  JSON_CONTAINS('[1,2,3,4,5]','7','$') Returns: 0
  JSON_CONTAINS('[1,2,3,4,5]','1','$') Returns: 1

Searching for Strings in Arrays

Similar to searching for integers, to search for strings in an array of strings, use this syntax:

JSON_CONTAINS(data, 'element', '$')

For example:

  JSON_CONTAINS('["a","2","c","4","x"]','"x"','$') Returns: 1
  JSON_CONTAINS('["1","2","3","4","5"]','"7"','$') Returns: 0

Applying the Knowledge

To answer the original question, you can search for array elements greater than 2 with the following query:

SELECT * from my_table
WHERE JSON_CONTAINS(data, '2', '$');

This query will return all rows where the data column contains an array with an element greater than 2.

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