add a column sql code example

Example 1: sql add column

ALTER TABLE Customers
ADD Email varchar(255);

Example 2: sql server add column

ALTER TABLE dbo.doc_exa ADD column_b VARCHAR(20) NULL, column_c INT NULL ;

Example 3: how to add column to table sql

ALTER TABLE table_name ADD column_name varchar(50);

Example 4: sql how to add a column

ALTER TABLE table_name

ADD column_name datatype;