sql query to make a existing column auto increment
Alter table table_name modify column_name datatype(length) AUTO_INCREMENT PRIMARY KEY
sql query to make a existing column auto increment
Alter table table_name modify column_name datatype(length) AUTO_INCREMENT PRIMARY KEY
set auto increment from 1
SET @num := 0;
UPDATE your_table SET id = @num := (@num+1);
ALTER TABLE your_table AUTO_INCREMENT =1;
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