Mysql change primary key

ALTER TABLE tableName MODIFY COLUMN id INT; /* First you should drop auto increment */
ALTER TABLE tableName DROP PRIMARY KEY; /* Dop primary key */
ALTER TABLE tableName ADD PRIMARY KEY (new_id); /* Set primary key to the new column */
ALTER TABLE tableName MODIFY COLUMN new_id INT AUTO_INCREMENT; /* Set auto increment to the new primary key */

Similar codes

0 vote258 views1 answer
Mariadb alter table add column if not exists example
SQL
0 vote246 views1 answer
Why mysql is used?
SQL
6 votes261 views4 answers
Delete table sqlite
SQL
0 vote254 views1 answer
Mariadb used space
SQL
5 votes308 views2 answers
How to ascending order in sql
SQL
0 vote268 views1 answer
Port 5432 is already in use Usually this means that there is already a PostgreSQL server running on your Mac. If you want to run multiple servers simultaneously, use different ports.
SQL
0 vote252 views1 answer
Add unique constraint sql server multiple columns
SQL
0 vote284 views1 answer
Psql initialization
SQL
10 votes254 views2 answers
Forgot my mysql password mac
SQL
0 vote265 views1 answer
Create a table from one field of another table
SQL