There are 7 types of data types which are native for SQL,they are :

1. Exact numeric – bigint,int,smallint,tinyint,decimal,numeric.
2. Approximate numeric – float,real.
3. Monetary – money,smallmoney.
4. Date and Time – datetime,smalldatetime.
5. Binary – binary(n),varbinary(n)varbinary(max),image.
6. Character – char(n),varchar(n),nchar(n),nvarchar(n),varchar(max),nvarchar(max),text,ntext.
7. Special purpose – bit,sql_variant,timeStamp,XML,table,cursor,uniqueidentifier.