Finding all caps in columns?

Question

When working with MySQL, how can I fetch all rows where the name column is all uppercase?

Since equality is case insensitive, I'm not quite sure how to do this.

Answer 1

If your column collation is case insensitive, you can override it in your query:

SELECT * FROM my_table WHERE my_column COLLATE latin1_bin = UPPER(my_column);

COLLATE clause syntax.

Answer 2

SELECT * FROM my_table REGEXP '^[[:upper:]]+$';

Answer 3

SELECT * FROM table where binary your_field REGEXP '^[[:upper:]]+$'

Similarly:

SELECT * FROM table where binary your_field REGEXP '^[[:upper:]]+$'

The 'binary' casts the field to binary which is necessary for REGEXP to be case-sensitive with most data types (except binary, of course).

[:character_class:] notation is documented here - there are several other useful character classes.

'binary' operator is documented here.