How many bytes in a var-char?

Answer 1

In SQL, the storage size of a VARCHAR data type is determined by the length of the string stored in it, plus an additional byte (or two bytes for very large strings) to store the length of the string. Specifically, it uses 1 byte for strings up to 255 characters and 2 bytes for strings longer than 255 characters. Therefore, the total size in bytes for a VARCHAR(n) can be up to n + 1 or n + 2, depending on the length of the data.