模拟FULL OUTER JOIN：LEFT + RIGHT JOIN的UNION与交叉连接的性能

Question

Access / Jet数据库引擎不支持FULL OUTER JOIN s：

SELECT Table1.*, Table2.*
FROM Table1
FULL OUTER JOIN Table2 ON Table1.JoinField = Table2.JoinField

通常建议的替代方法是UNION LEFT和RIGH JOIN s的结果;以下内容有所不同：

SELECT Table1.*, Table2.*
FROM Table1
LEFT JOIN Table2 ON Table1.JoinField = Table2.JoinField

UNION ALL 
SELECT Table1.*, Table2.*
FROM Table1
RIGHT JOIN Table2 ON Table1.JoinField = Table2.JoinField
WHERE Table1.JoinField IS NULL

但是，是否也可以使用交叉连接？

SELECT Table1.*, Table2.*
FROM Table1, Table2
WHERE Table1.JoinField = Table2.JoinField
    OR Table1.JoinField IS NULL
    OR Table2.JoinField IS NULL

以这种方式使用交叉联接是否有任何性能损失或其他缺点？