In this post you will be told how many types of data types are there in SQL, Let us go into detail, so let's start. When you create a new relation (Table), you specify a data type for each of its columns/attributes. Similarly, when you create a new procedure, you specify a data type for each of its arguments. The data type defines the allowed values that each column or argument can store. For example, a DATE column cannot store a value of March 32, because this is not a valid date. ...