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What MySQL CHAR_LENGTH() function returns if no parameter is provided to it?
In this case, it means we are providing an empty string as an argument to the CHAR_LENGTH() function. It will return 0 on providing empty string because there are no characters to be counted by CHAR_LENGTH() function.
Example
mysql> Select CHAR_LENGTH('');
+-----------------+
| CHAR_LENGTH('') |
+-----------------+
| 0 |
+-----------------+
1 row in set (0.00 sec)
Updated on: 20-Jun-2020
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