sql add column

ALTER TABLE Customers
ADD Email varchar(255);

  ALTER TABLE Customers
ADD Email varchar(255);
 

ALTER TABLE table_name
ADD column_name datatype;

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

ALTER TABLE table_name 
ALTER COLUMN column_name new_data_type(size);

ALTER TABLE table_name
ALTER COLUMN column_name datatype;

ALTER TABLE table_name

ADD column_name datatype; 

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

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

ALTER TABLE table_name
ADD column_name datatype;

ALTER TABLE table_name 
ADD column_name datatype;

ALTER TABLE `fb_banners`
ADD `city_id` BIGINT(20) UNSIGNED NULL DEFAULT NULL AFTER `BannerID`,
ADD INDEX `Foreign_city_id_banners` (`city_id`) USING BTREE,
ADD CONSTRAINT `Foreign_city_id_banners` FOREIGN KEY (`city_id`) REFERENCES `foodsafari`.`fb_cities` (`id`) ON UPDATE CASCADE ON DELETE CASCADE;