Eine Einführung in

SQL

Substring: Extracting part of a string.

DB2
We from position 1 (the beginning) we take two characters. 4. 
'Afghanistan' -> 'Af'
'China'       -> 'Ch'
'Sri Lanka'   -> 'Sr'
The SQL standard insists on a horrible syntax: 
SUBSTRING(name FROM 1 FOR 2)


Specific to DB2
none