We can use the SQLite json_remove() function to remove one or more elements from a JSON object or array.
We pass the original JSON as the first argument when we call the function, followed by one or more paths that specify which elements to remove. By “elements”, I mean either array elements or object members (key/value pairs).
Continue readingIn SQLite, the json_patch() function can be used to add, modify, or delete elements of a JSON Object.
To do this, it runs the RFC-7396 MergePatch algorithm to apply a given patch against the given JSON input.
We pass the original JSON as the first argument when we call the function, followed by the patch. The function then applies that patch against JSON in the first argument.
Continue readingThe SQLite json_replace() function allows us to replace an existing value in a JSON document with another value.
We pass the original JSON as the first argument when we call the function, followed by the path of the value to replace, followed by the value to replace.
We can also replace multiple key/value pairs if required.
Continue readingThe SQLite json_set() function allows us to insert into, or replace, a value in a JSON document.
We pass the original JSON as the first argument when we call the function, followed by a path that specifies where to insert/replace the new value, followed by the value to insert/replace.
We can also insert/replace multiple key/value pairs if required.
Continue readingThe SQLite json_insert() function allows us to insert a new value into a JSON document.
We pass the original JSON as the first argument when we call the function, followed by a path that specifies where to insert the new value, followed by the value to insert.
We can also insert multiple key/value pairs if required.
Continue readingIn SQLite, the json_extract() function extracts and returns one or more values from well-formed JSON.
We pass the JSON as an argument when we call the function, and it returns the applicable value/s.
We can specify one or more paths to extract from the JSON document.
Continue readingIn SQLite, the json_array_length() function returns the number of elements in a given JSON array.
The array is provided as an argument. If the array is embedded within a larger JSON document, we can use an optional second argument to specify the path to the array.
If the value is not an array, the function returns 0.
The SQLite json_group_object() function is an aggregate function that returns a JSON object comprised of all name/value pairs in the aggregation.
In other words, it constructs a JSON object from the values provided by its arguments.
Continue readingThe SQLite json_group_array() function is an aggregate function that returns a JSON array comprised of all values in the aggregation.
In other words, it constructs an array from the values provided by its argument.
Continue readingIn SQLite, the json_valid() function checks whether or not its argument is well-formed JSON.
It returns 1 if the argument is well-formed JSON, and 0 if it’s not.