Check out example codes for "add new column to the table mysql". It will help you in understanding the concepts better.

Code Example 1

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

Code Example 2

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

Code Example 3

add column in a table

Learn ReactJs, React Native from akashmittal.com