Question

In mySQL I have to use WHERE BINARY UPPER(col1) = col1 but in Oracle it works with no problem. Can someone explain to me why this is? I am new to mySQL.

So looking at it with the following statement

select upper(col1),col1
from mytable
where upper(col1) = col1;

Result in Oracle:

UPPER(COL1)          COL1               
-------------------- --------------------
JÜRGEN               JÜRGEN               
RENÉ                 RENÉ                 
CARL                 CARL 

Result in MySQL

UPPER(COL1)          COL1               
-------------------- --------------------
JÜRGEN               JÜRGEN               
JÜRGEN               Jürgen               
RENÉ                 René                 
RENÉ                 RENÉ                 
CARL                 Carl                 
CARL                 CARL 

Answer 1

String comparisons are not case-sensitive in MySQL nor SQLServer by default.

How can I make SQL case sensitive string comparison on MySQL?

http://dev.mysql.com/doc/refman/5.0/en/case-sensitivity.html

Why is SQL Server '=' comparator case insensitive?

http://msdn.microsoft.com/en-us/library/aa174903%28SQL.80%29.aspx