php - How to resequence the AUTO_INCREMENT id in MySQL after deleting few records? -


i have table 3000 entries. randomly choosing 25 of shifted table. once done, want ids (which assigned auto_increment , primary key) in original table in sequence, perform next iteration. how should it?

we cannot change auto_increment value value other current max value.auto_increment counter keeps on incrementing value used column defined.

the other way change value above current max value manually alter value of auto_increment counter max(value) +1.

so guess here have order records in ascending existing id after deleting 25 records , manually set id value of each record according incrementing variable , in end set auto_increment count value value of variable in end +1.

sample :

alter table t set auto_increment=some_value;

though advised leave auto_increment alone , avoid if it's done sake of making ids great , there no other probable reason.


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