Tip:When you are using a multibyte character set, you can use the EXTBYTES function instead of the EXTCHARS function.
TEXT or NTEXT
EXTCHARS(text-expression [start [length]])
NTEXT expression from which a portion is to be extracted. When text-expression is a multiline text value, EXTCHARS preserves the line breaks in the returned value.
INTEGER that represents the character position at which to begin extracting. The position of the first character in text-expression is 1. When you omit this argument, EXTCHARS starts with the first character.
INTEGER that represents the number of characters to be extracted. When length is not specified, or exceeds the number of characters from start to the end of text-expression, the part from start to the end of text-expression is extracted.