add column in existing table code example

Example 1: sql add column

ALTER TABLE Customers
ADD Email varchar(255);

Example 2: alter table add column

ALTER TABLE table
ADD COLUMN column VARCHAR (255) NOT NULL AFTER column;

Example 3: sql server add column

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

Example 4: alter table add column

ALTER TABLE table_name 
ADD column_name datatype;

Example 5: how to add column to table sql

ALTER TABLE table_name ADD column_name varchar(50);