alter table mysql
ALTER TABLE contacts
ADD last_name varchar(40) NOT NULL
AFTER contact_id,
ADD first_name varchar(35) NULL
AFTER last_name;
alter table mysql
ALTER TABLE contacts
ADD last_name varchar(40) NOT NULL
AFTER contact_id,
ADD first_name varchar(35) NULL
AFTER last_name;
alter table query in mysql
ALTER TABLE `employees`CHANGE `emp_id` `emp_id` int(11) NULL;
my sql alter table
ALTER TABLE nom_table
DROP nom_colonne
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