In MariaDB, JSON_ARRAYAGG() is a built-in function that returns a JSON array containing an element for each value in a given set of JSON or SQL values.
The function acts on a column or an expression that evaluates to a single value. It enables you to aggregate a result set as a single JSON array. Each row of the result set ends up as a single element in the array.
Continue readingIn MariaDB, JSON_ARRAY() is a built-in function that returns a JSON array containing the specified values, provided as arguments.
In MariaDB, JSON_TABLE() is a built-in function that converts JSON data into a relational form.
In other words, it lets you return a JSON document as a table.
The JSON_TABLE() function was introduced in MariaDB 10.6.0.
If you’re using a T-SQL function such as OPENJSON(), JSON_QUERY(), or JSON_VALUE(), you might be wary of any non-alphanumeric characters that might be in the JSON document that you’re working with. Especially if those special characters are in the key names, and you need to reference those key names.
When using mongoimport, you can use the --jsonArray parameter to import an array of JSON documents.
When you use mongoimport to import files into MongoDB, you have the option of merging existing documents with the ones that you’re importing.
In this case, if an imported document has the same _id value as an existing one in the collection that you’re importing into, the existing document will be merged with the one being imported.
You can also specify another field (other than the _id field) to be the matching field if required.
When you use mongoimport to import files into MongoDB, you have the option of replacing existing documents that match the ones you’re importing.
By this I mean, if an imported document has the same _id value as an existing one in the collection you’re importing into, the existing document will be replaced with the one being imported.
You can also specify another field (other than the _id field) to be the matching field if required.
The way to replace existing documents when using mongoimport is to use upsert mode.
The MongoDB Database Tools include a utility called mongoexport that enables you to export MongoDB data to a CSV or JSON file.
One of the things you can do with this utitlity is export query results. This article shows you how to use mongoexport to export MongoDB query results to a JSON file.
The MongoDB Database Tools include a utility called mongoexport that enables you to export MongoDB data to a CSV or JSON file.
This article shows you how to use mongoexport to export a MongoDB collection to a JSON file.
If you’re using OPENJSON(), but you’re trying to remember how to select an inner fragment from the JSON document, read on.