LOWER Function
The LOWER function accepts an expression argument and returns a character string in which every uppercase alphabetic character in the expression is replaced by a corresponding lowercase alphabetic character.
The following example shows how to use the LOWER function
to perform a case-insensitive search on the City column. This
statement directs the database server to replace all instances (that
is, any variation) of the words
san jose
, with the
mixed-case format, San Jose
. UPDATE Weather SET City = "San Jose" WHERE LOWER (City) = "san jose";