Below is a full list of character sets available in MariaDB.
Continue readingCategory: DBMS
Database Management Systems
Show the Collation in MariaDB
In MariaDB, collation can be applied at many levels. Collation can be applied at the server level, the connection level, the database level, the table level, and even at the column level.
It’s also possible to specify a collation at the query level, so that it will override any collation that has been applied at the database, table, or column levels.
MariaDB provides a number of options for returning the collation at the various levels.
Continue readingHow CHAR() Works in MariaDB
In MariaDB, CHAR() is a built-in string function that returns characters based on their code values.
CHAR() accepts one or more integers. It then returns a string consisting of the characters given by the code values of those integers.
How CHR() Works in MariaDB
In MariaDB, CHR() is a built-in string function that returns a character based on the code values provided as an argument.
How ORD() Works in MariaDB
In MariaDB, ORD() is a built-in string function that returns the numeric character code of the leftmost character of its string argument.
The ORD() function can handle multi-byte characters. This is in contrast to the ASCII() function, which only handles single-byte (8 bit) characters.
How ASCII() Works in MariaDB
In MariaDB, ASCII() is a built-in string function that returns the numeric ASCII value of the leftmost character of its string argument.
The ASCII() function only works on 8 bit characters. To get the code for multi-byte characters, use the ORD() function instead.
Install MariaDB on a Mac
Here’s how to install MariaDB on a Mac via the Homebrew package manager.
Continue readingMongoDB sort()
In MongoDB, the cursor.sort() method specifies the order in which the query returns matching documents.
The sort() method accepts a document that specifies the field to sort, and the sort order. The sort order can be either 1 for ascending or -1 for descending.
You can also specify { $meta: "textScore" } when doing $text searches, in order to sort by the computed textScore metadata in descending order.
MongoDB $orderBy
In MongoDB, the $orderBy query modifier sorts the results of a query in ascending or descending order.
$orderBy accepts a document that specifies the field to sort, and the sort order. The sort order can be either 1 for ascending or -1 for descending.
$orderBy has been deprecated in the mongo shell since v3.2. Use the cursor.sort() method instead.
MongoDB $sort
In MongoDB, the $sort aggregation pipeline stage sorts all input documents and returns them to the pipeline in sorted order.