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  3. April 2019

Re: [EXT] Re: How can I detect an invalid date string in SQL?

On Wed, Apr 17, 2019 at 11:10 AM Salsman, Michael
<Michael.Salsman@xxxxxxxxxxxxxx> wrote:

This worked for me. Not the most flexible but it works and can be altered in the future for you.

select storagedt, CASE WHEN REGEXP_LIKE(trim(TEST),'[\d][\d][\d][\d][-][\d][\d][-][\d][\d]') then dec(date(storagedt)) else 0 end as "as Decimal" from
mytable

You don't need to put every character being matched in a set. So you
could do '\d\d\d\d-\d\d-\d\d' instead.

Moreover, the regular expressions in Db2 for i (not sure about other
databases) support counting, so you can actually do
'\d{4}-\d{2}-\d{2}'. This is quite standard among regular expression
processors.

John Y.

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