ALTER TABLE Table_name ADD Email varchar(255);
ALTER TABLE Table_name ADD name_column INT(255);
ALTER TABLE table_name ADD [COLUMN] column_name column_definition [FIRST|AFTER existing_column];
ALTER TABLE table ADD [COLUMN] column_name_1 column_1_definition [FIRST|AFTER existing_column], ADD [COLUMN] column_name_2 column_2_definition [FIRST|AFTER existing_column], ... ;