Search results
Definition and Usage. The LENGTH () function returns the length of a string (in bytes). Syntax. LENGTH (string) Parameter Values. Technical Details. More Examples. Example. Return the length of the text in the "CustomerName" column, in bytes: SELECT LENGTH (CustomerName) AS LengthOfName. FROM Customers; Try it Yourself »
23 sty 2023 · You are looking for CHAR_LENGTH() to get the number of characters in a string. For multi-byte charsets LENGTH() will give you the number of bytes the string occupies, while CHAR_LENGTH() will return the number of characters.
19 sie 2011 · Storing a string of 100 characters in a varchar(256) field will take 102 bytes. This is why you see varchar(255) so frequently; 255 characters is the longest string you can store in MySQL's varchar type with only one byte of overhead. Anything larger requires two bytes of overhead.
This tutorial shows you how to use the MySQL LENGTH() function to get the length of a string measured in bytes.
21 kwi 2015 · LENGTH() returns the length of the string measured in bytes. CHAR_LENGTH() returns the length of the string measured in characters. This is especially relevant for Unicode, in which most characters are encoded in two bytes. Or UTF-8, where the number of bytes varies.
MySQL stores VARCHAR values as a 1-byte or 2-byte length prefix plus data. The length prefix indicates the number of bytes in the value. A VARCHAR column uses one length byte if values require no more than 255 bytes, two length bytes if values may require more than 255 bytes.
25 gru 2020 · The MySQL LENGTH () function returns the length of a given string in bytes. So, if we use LENGTH () on five 3-byte characters, we get 15 as our result (5 x 3 = 15). The LENGTH () function is mostly used with the SELECT Statement.
