Daniel Morgan wrote:
> Mark Townsend wrote:
>
>> Daniel Morgan wrote:
>>
>>> Frank van Bortel wrote:
>>>
>>>> <g> COuld you make that a regular? I'd like that.
>>>
>>>
>>>
>>>
>>> My pleasure. I can't remember if I've done this one before ... but in
>>> the US telephone numbers with area code are always in the form
>>> ###-###-####.
>>>
>>> Write a simple function that will return a Boolean (True/False) as to
>>> whether something has the format of a valid telephone number with
>>> area code. It must check for the following:
>>>
>>> Three integers between 0 and 9
>>> Followed by a dash '-'
>>> Followed by three integers between 0 and 9
>>> Followed by a dash '-'
>>> Followed by four integers
>>> The length must be 12.
>>>
>>> Hint: When I run the following query:
>>> select * from user_source where name = <function_name>;
>>> it returns only 7 lines of code.
>>>
>>
>> Can I use 10g Regexs ?
>
>
> If you think you can do it better than with 9i features ... post your
> code: I'm betting you can't. I'll compare what you do with my 9i
> solution and report back the results.
>
Do we have to do the function thing - what if we just return the valid
rows ?
Then the whole thing can be done in a single SELECT. Something like (and
I haven't tested this, I don't have 10g at home on the Macs yet, but
this is close)
Select * from table
where
REGEXP_LIKE(number,'^([[:digit:]]{3}-[[:digit:]]{3}-[[:digit:]]{4}|[[:digit:]]{10})$')
Received on Thu Jan 29 2004 - 01:43:08 CST
