how to modify column name in sql code example

Example 1: append column sql

ALTER TABLE table_name
ADD column_name datatype;

--example
ALTER TABLE Customers
ADD Email varchar(255);

Example 2: change column name sql

ALTER TABLE `db_name`.`table_name` 
	CHANGE `current_column_name` `new_column_name` datatype(size) NOT NULL COMMENT '';

Example 3: modify column name in tsql

sp_rename 'table_name.old_column', 'new_name', 'COLUMN';

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