Answers for "alter table my sql"

add new column to the table mysql

ALTER TABLE `TABLE_NAME` 
	ADD `COLUMN_NAME` VARCHAR(50) NULL
    AFTER `COLUMN_NAME_AFTER`;

how to alter table column name in mysql

ALTER TABLE your_table_name RENAME COLUMN original_column_name TO new_column_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;

mysql alter table add column

ALTER TABLE table ADD [COLUMN] column_name column_definition [FIRST|AFTER existing_column];

my sql alter table

ALTER TABLE nom_table
MODIFY nom_colonne type_donnees

my sql alter table

ALTER TABLE nom_table
DROP nom_colonne