sql server add column

Code Example 1

ALTER TABLE Customers
ADD Email varchar(255);

Code Example 2

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

Code Example 3

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

Code Example 4

ALTER TABLE table_name
ADD column_name datatype;

Code Example 5

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

Code Example 6

ALTER TABLE table_name

ADD column_name datatype;