Thread: Selecting all records which are in upper case

Hello

I have a simple table 'location' :
id -> Int (associated with a sequence)
name -> Character varying (100)

I have to delete all records where values in name field are all in upper case. For example, if the test data is as follows:

id    name
1    abccvvvv
2    Abc dsase
3    CDF FDER
4    Amcddd FFR
5    EE DFEW
6    Sedcd

Only reecords #3 and #5 are to be deleted. The closest I could reach was this:
"delete from location where (ascii(substring(name from 1 for 1)) between 65 and 90) and (ascii(substring(name from char_length(name) for 1)) between 65 and 90)"
The problem with this query is it would also delete record #4.

How do I get it to select only those records in which all characters are in uppercase?


Amitabh

On Sat, Aug 27, 2011 at 03:12:44PM +0530, Amitabh Kant wrote:
> Hello
>
> I have a simple table 'location' :
> id -> Int (associated with a sequence)
> name -> Character varying (100)
>
> I have to delete all records where values in name field are all in upper
> case. For example, if the test data is as follows:

Might not work if you have non-ascii characters (but your example code
breaks there too), but what about:

DELETE ... WHERE upper(name) = name;

Have a nice day,
--
Martijn van Oosterhout   <kleptog@svana.org>   http://svana.org/kleptog/
> He who writes carelessly confesses thereby at the very outset that he does
> not attach much importance to his own thoughts.
   -- Arthur Schopenhauer

Thanks Martin. Definitely a much simpler way. I also cross-checked it on my table, and it does work on non-ascii characters. It is only returning me upper case entries. All other entries remain unaffected.

Amitabh