You can have up to 11 players on the field but most of the time you have 9.   There is the pitcher,catcher,third basemen,short stop,second basemen,first basemen,left â¦ field,center field,and right field.   The way you get up to 11 players is if you put some in right center and left center field.
A tuple is a fixed fixed-length list containing elements that need not have the same type. It can be, and often is, used as a key-value pair. A row (sometimes called a record) is the set of fields within a table that are relevant to a specific entity.
Tuples* are unordered sets of known values with names. Thus, the following tuples are the same thing (I'm using an imaginary tuple syntax since a relational tuple is largely a theoretical construct): ...assuming of course that x, y, and z are all integers. Also note that there is no such thing as a duplicate tuple. Thus, not only are the above equal, they're the same thing. Lastly, tuples can only contain known values (thus, no nulls). A row** is an ordered set of known or unknown values with names (although they may be omitted).