Sort multiple tables as one (Join but not really)

Table 1
Link | Entry1 | Entry2 |
123  |  foo   |  bar   |

Table 2
Link | Entry3 | Entry4 |
456  |  foo1  |  bar1  |

Table 3
Link | Entry5 | Entry6 |
789  |  foo2  |  bar2  |


Result
Link | Entry1 | Entry2 | Entry3 | Entry4 | Entry5 | Entry6 |
123  |   foo  |  bar   |        |        |        |        |
456  |        |        |  foo1  |  bar1  |        |        |
789  |        |        |        |        |  foo2  |  bar2  |

SELECT Link
     , Entry1
     , Entry2
     , NULL AS Entry3
     , NULL AS Entry4
     , NULL AS Entry5
     , NULL AS Entry6 
  FROM table1
UNION ALL
SELECT Link
     , NULL 
     , NULL 
     , Entry3
     , Entry4
     , NULL 
     , NULL 
  FROM table2
UNION ALL       
SELECT Link
     , NULL
     , NULL
     , NULL
     , NULL
     , Entry5
     , Entry6 
  FROM table3