___________displays tuples in result with no matching values in other table. code example
Example 1: join to find results not in another table
SELECT t1.name
FROM table1 t1
LEFT JOIN table2 t2 ON t2.name = t1.name
WHERE t2.name IS NULL
Example 2: sql select all from one table and one column from another
SELECT myTable.*, otherTable.foo, otherTable.bar...