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Asked: 2026-05-27T21:58:42+00:00

I have a database with records of M +2, the problem is: I had

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I have a database with records of M +2, the problem is: I had to delete about 10 000, and now I got this problem, the IDs will be missing, eg

ID: 100
ID: 102
ID: 103
...

How to organize this? That is, replace all subsequent IDs for no “holes” with this? Remember, I have more than 2 million records (15,000 more per day), manually is not feasible.

I Need:

ID: 101
ID: 102
ID: 103
...
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1 Answer

  1. Editorial Team

    You may find that storing all of the records in a source table, then INSERT those into a secondary table once you’re sure which ones qualify. This is usually pretty easy:

    INSERT INTO b_table (a, b, c) SELECT a, b, c FROM a_table

    If you have an auto-increment ID field you just leave it out of both sides and it will re-create it on the b_table side, sequentially, no gaps. You can purge records from a_table when you’re done with them if you like.

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