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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