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ALTER IN SQL

ALTER TABLE DataFlair
ADD emp_id varchar(5);

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sql alter table

-- With check if field already exists

IF NOT EXISTS(SELECT 1 FROM sys.columns 
          WHERE Name = N'Email'
          AND Object_ID = Object_ID(N'dbo.Customers'))
BEGIN    
	ALTER TABLE Customers
    ADD Email varchar(255);
END

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SQL

ALTER IN SQL

sql alter table

ADD CONTENT