oops ! sorry. I should not have written before
thinking and referring to documentation.
select * from TABLE where mid is NULL;
--- Srinivas Iyyer <srini_iyyer_bioop@yahoo.com>
wrote:
> hello group:
>
> I have a table that has 500,000 rows.
>
> tar_id | mid | seq_id | lscore
> --------+-------+--------+--------
> 32014 | | 50473 | 814
> 32015 | 67 | 50473 | 814
> 32016 | 461 | 50473 | 814
> 32017 | | 52964 | 857
> 32018 | 428 | 52964 | 822
> 32019 | 98 | 51208 | 737
> 32020 | 435 | 51208 | 737
> 32021 | | 51208 | 764
> 32022 | 98 | 41066 | 759
> 32023 | 431 | 41066 | 593
> 32024 | 250 | 41066 | 659
>
> The mid column is empty in certain places. how can I
> search if there are empty spaces in mid.
>
> Thanks.
>
>
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