OPTIMIZE QUERY BASED ON UNIQUE ATTRIBUTE

Example implementations relate to optimized queries based on unique attributes. For example, a computing device may include a processor. The processor may receive a query and identify at least one unique attribute based on at least one operation specified in the query or based on an attribute property associated with at least one relational table relevant to the query, the attribute property indicating uniqueness. The processor may modify a data structure representing the query, the data structure having nodes each associated with a respective relational table and the data structure modified to specify a subset of the nodes that are associated with the at least one unique attribute. The processor may optimize the query based on the data structure modified to specify the subset.