I have a JSON field in a MySQL database that contains values like [1,3,4,7]
. I would like to be able to easily supply another array from a PHP variable and determine if there is any overlap. I know this example does not work, but this is what I am trying to do:
$DaysVar = $_GET['Days']; --Example is [1,5,8]
$sql = mysqli_query($db, "
SELECT ScheduleID,
Days --Example is [1,3,4,7]
FROM Schedule
WHERE JSON_CONTAINS(Days, '$DaysVar')
");
How can I get this query to return a result since there is a 1 in each array?
On MySQL 5.7.8+ you can perform a JSON_CONTAINS
for each separate value:
SELECT *
FROM Schedule
WHERE ( JSON_CONTAINS(Days, '1')
OR JSON_CONTAINS(Days, '2')
OR JSON_CONTAINS(Days, '6')
)
When the values to be searched for are stored in a PHP variable -- as in your question -- then you could build the above SQL like this:
$DaysVar = $_GET['Days'];
$condition = implode(" OR ", array_map(function($day) {
return "JSON_CONTAINS(Days, '$day')";
}, $DaysVar));
$sql = mysqli_query($db, "
SELECT ScheduleID,
Days
FROM Schedule
WHERE ($condition)
");
Since MySQL 8 you can use JSON_OVERLAPS
:
SELECT *
FROM Schedule
WHERE JSON_OVERLAPS(Days, '$DaysVar')
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With