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SELECT LENGTH('text'); --------------------------------------------------------- | LENGTH('text') | --------------------------------------------------------- | 4 | --------------------------------------------------------- 1 row in set (0.00 sec) Reads the file and returns the file contents as a string.

To use this function, the file must be located on the server host, you must specify the full pathname to the file, and you must have the FILE privilege.

Returns 1 if expr matches pat; otherwise it returns 0. REGEXP is not case sensitive, except when used with binary strings.

A numeric argument is converted to its equivalent binary string form; if you want to avoid that, you can use an explicit type cast, as in this example: SELECT CONCAT('My', 'S', 'QL'); --------------------------------------------------------- | CONCAT('My', 'S', 'QL') | --------------------------------------------------------- | My SQL | --------------------------------------------------------- 1 row in set (0.00 sec) CONCAT_WS() stands for Concatenate With Separator and is a special form of CONCAT().

SELECT CHAR_LENGTH("text"); --------------------------------------------------------- | CHAR_LENGTH("text") | --------------------------------------------------------- | 4 | --------------------------------------------------------- 1 row in set (0.00 sec) CHARACTER_LENGTH() is a synonym for CHAR_LENGTH().

Returns the string that results from concatenating the arguments. If all arguments are non-binary strings, the result is a non-binary string.

The second syntax returns the position of the first occurrence of substring substr in string str, starting at position pos. SELECT LOCATE('bar', 'foobarbar'); --------------------------------------------------------- | LOCATE('bar', 'foobarbar') | --------------------------------------------------------- | 4 | --------------------------------------------------------- 1 row in set (0.00 sec) SELECT LOWER('QUADRATICALLY'); --------------------------------------------------------- | LOWER('QUADRATICALLY') | --------------------------------------------------------- | quadratically | --------------------------------------------------------- 1 row in set (0.00 sec) SELECT LPAD('hi',4,'??

'); --------------------------------------------------------- | LPAD('hi',4,'?? ') | --------------------------------------------------------- | ?? hi | --------------------------------------------------------- 1 row in set (0.00 sec) SELECT LTRIM(' barbar'); --------------------------------------------------------- | LTRIM(' barbar') | --------------------------------------------------------- | barbar | --------------------------------------------------------- 1 row in set (0.00 sec) Returns a set value (a string containing substrings separated by .,.

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