| Bulgarian | English |
| външно съединение | outer join (A join that includes all the rows from the joined tables that meet the search conditions, even rows from one table for which there is no matching row in the other join table) |
| дясно външно съединение | right outer join (An outer join in which all the records from the right side of the RIGHT JOIN operation in the query's SQL statement are added to the query's results, even if there are no matching values in the joined field from the table on the left) |
| ляво външно съединение | left outer join (A type of outer join in which all rows from the left-most table in the JOIN clause are included. When rows in the left table are not matched by rows in the right table, all result set columns that come from the right table are assigned a value of NULL) |
| рефлексивно съединение | self-join (A join in which records from a table are combined with other records from the same table when there are matching values in the joined fields. A self-join can be an inner join or an outer join. In database diagrams, a self-join is called a reflexive relationship) |
