The relational operators in Pig are as follows :
COGROUP : It joins two or more tables and then performs GROUP operation on the joined table result.
CROSS : This is used to compute the cross product (cartesian product) of two or more relations.
FOREACH : This will iterate through the tuples of a relation, generating a data transformation.
JOIN : This is used to join two or more tables in a relation.
LIMIT : This will limit the number of output tuples.
SPLIT : This will split the relation into two or more relations.
UNION : It will merge the contents of two relations.
ORDER : This is used to sort a relation based on one or more fields.
