Also, it ignores whether the characters are single-byte or multi-bytes. String functions ascii charlength characterlength concat concatws field findinset format insert instr lcase left length locate lower lpad ltrim mid position repeat replace reverse right rpad rtrim space strcmp substr substring substringindex trim ucase upper numeric functions abs acos asin atan atanavg ceil ceiling cos cot count degrees. The following statement uses the LENGTH function to return the number of characters the string SQL. Example of MySQL LENGTH function with where clause The following MySQL statement returns the pubname and length of pubname from publisher table who have the length of there is more than or equal to 20. Therefore a string containing three 2-byte characters, LENGTH function will return whereas CHAR LENGTH function will returns 3. To get the number of characters in a string in MySQL and PostgreSQL, you use the CHAR LENGTH function instead.
You are looking for CHAR LENGTH to get the number of characters in a string.
SQL
CHAR LENGTH returns the length of the string measured in characters. However, if a string contains multi-byte characters, its length in bytes is typically greater than its length in characters. SQL The LENGTH function returns the number of bytes in some relational database systems such as MySQL and PostgreSQL. In MySQL, a string can be in any character set. Returns the length of the string str, measured in bytes.
MySQL CHAR LENGTH returns the length (how many characters are there) of a given string.
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LENGTH : Returns the length of a string (in bytes) LOCATE : Returns the position of the first occurrence of a substring in a string: LOWER : Converts a string to lower-case: LPAD : Left-pads a string with another string, to a certain length: LTRIRemoves leading spaces from a string: MID: Extracts a substring from a string (starting at any position) POSITION : Returns the position of the first occurrence of a substring in a string: REPEAT. This is especially relevant for Unicode, in which most characters are encoded in two bytes. It returns the length of the input string by counting the number of characters.
For multi-byte charsets LENGTH will give you the number of bytes the string occupies, while CHAR LENGTH will return the number of characters. LENGTH returns the length of the string measured in bytes. This means that for a string containing five 2-byte characters, LENGTH returns 1 whereas CHAR LENGTH returns 5. The function simply counts the number characters and ignore whether the character(s) are single-byte or multi-byte.
If a string contains 1-byte characters, its length measured in characters and its length measured in bytes are equal.
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