The LEFT() function returns a substring that contains the'length 'leftmost characters of the string. The whole string is returned if'length' exceeds the length of the string. It is an error for the number of characters to be less than 0.
De funksje LEFT () jout it troch lingte bepaalde oantal meast loftse karakters fan tekst werom. As lingte grutter is as de lingte fan tekst wurdt de hiele tekenrige tekst weromjûn. It is in flater foar de tal lettertekens om minder dan 0 te wêzen.