In MariaDB, SUBSTRING_INDEX() is a built-in string function. It returns a substring from a string before a certain number of occurrences of the specified delimiter.
SUBSTRING_INDEX() requires at three arguments; the string, the delimiter, and the count (i.e. number of occurrences of that delimiter).
In MariaDB, REPEAT() is a built-in string function that returns a string repeated a certain number of times.
You pass the string, as well as the number of times you want it repeated when you call the function.
Continue readingIn MariaDB, QUOTE() is a built-in string function that allows you to escape a string so that it’s suitable for inclusion in an SQL statement.
The string is returned enclosed by single quotes, and a backslash is prepended to each instance of single quote ('), backslash (\), ASCII NUL, and Control-Z characters.
In MariaDB, MID() is a synonym for SUBSTRING(). It returns a substring from a given string.
According to the MariaDB documentation it’s a synonym for the SUBSTRING(str,pos,len) syntax of SUBSTRING(), however, my tests show that it works with all of the various forms.
In MariaDB, SUBSTR() is a synonym for SUBSTRING().
It’s a built-in string function that returns a substring from a given string.
It requires at least two arguments; the string, and the position for which to extract the substring from. It also accepts an optional third argument that allows you to specify how long the substring should be.
Continue readingIn MariaDB, SUBSTRING() is a built-in string function that returns a substring from a given string.
SUBSTRING() requires at least two arguments; the string, and the position for which to extract the substring from. It also accepts an optional third argument that allows you to specify how long the substring should be.
In MariaDB, MATCH AGAINST is a special construct used to perform a full-text search on a full-text index.
In MariaDB, COERCIBILITY() is a system function that returns the collation coercibility value of its string argument.
It defines how collations will be converted in the case of collation conflict. In such conflicts, an expression with a higher coercibility is converted to the collation of an expression with a lower coercibility.
Continue readingIn MariaDB, MAKE_SET() is a string function that returns a set value, based on the values provided in its arguments.
A set is a string containing substrings separated by comma (,) characters.
In MariaDB, TRIM_ORACLE() is a synonym for the Oracle mode version of the TRIM() function.
TRIM_ORACLE() is available in all modes, so it saves you from having to switch to Oracle mode, which is what you’d need to do if you wanted the TRIM() function to behave like Oracle’s TRIM() function.
The difference is in how each function treats empty strings. Oracle returns null whereas MariaDB returns an empty string.