mysql - Reorder / reset auto increment primary key -


i have mysql table auto increment primary key. deleted rows in middle of table. have, example, in id column: 12, 13, 14, 19, 20. deleted 15, 16, 17 , 18 rows.

i want reassign / reset / reorder primary key have continuity, i.e. make 19 15, 20 16, , on.

how can it?

you drop primary key column , re-create it. ids should reassigned in order.

however bad idea in situations. if have other tables have foreign keys table not work.


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