In MariaDB, JSON_COMPACT() is a built-in function that removes all unnecessary spaces from a JSON document, so that it’s as short and compact as possible, and returns the result.
This can be handy for when you need to store JSON data in a database column, and you don’t want the JSON documents to use up any more space than is necessary.
For the opposite effect (i.e. to prettify a JSON document by adding indents and spreading it over multiple lines), use the JSON_DETAILED() function.
In MariaDB, JSON_CONTAINS_PATH() is a built-in function that indicates whether a given JSON document contains data at the specified path or paths.
It returns 1 if the document does contain data at the specified path/s, 0 if it doesn’t, and NULL if any of the arguments are NULL.
In MariaDB, JSON_CONTAINS() is a built-in function that allows you to find out whether a specified value is found in the given JSON document, or at a specific path within the document.
It returns 1 if it does contain the value, 0 if it doesn’t, and NULL if any of the arguments are NULL.
Below are 4 functions that enable you to return the minutes portion from a time value in MariaDB.
Continue readingIn MariaDB, JSON_OBJECTAGG() is a built-in function that returns a JSON object containing key-value pairs, based on its two arguments.
In MariaDB, JSON_ARRAY_APPEND() is a built-in function that appends values to the end of the specified array/s within a JSON document, and returns the result.
In MariaDB, JSON_ARRAY_INSERT() is a built-in function that inserts a value into a JSON document and returns the result.
In MariaDB, JSON_OBJECT() is a built-in function that returns a JSON object containing the key/value pairs provided as arguments.
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 readingMariaDB includes many functions that allow you to return time and datetime values in a variety of formats.
Two functions allow you to format the time portion using a 12 hour clock, with the AM/PM designator are DATE_FORMAT() and TIME_FORMAT().
There are many format specifiers that can be used with these functions, but only a couple that return the AM/PM designator.
Continue reading