SQL：两个表的所有行合并在一起

Question

I am trying to combine two different tables in a select statement where all the rows in the first table are matched with all the rows in the second table. For example:

Table1
Table1_ID | FKey_Table2_ID
1           9
2           null

Table2
Table2_ID | Table2_Value
9           Yes
10          No
11          Maybe

Results needed:

Table1_ID | FKey_Table2_ID | Table2_ID | Table2_Value
1           9                9           Yes
1           null             10          No
1           null             11          Maybe
2           null             9           Yes
2           null             10          No
2           null             11          Maybe

Please note that the first row in Table1 has a key already assigned from Table2.

Answer 1

This is called a cross join and can be accomplished like this:

SELECT Table1_ID, FKey_Table2_ID, Table2_ID, Table2_Value
FROM Table1
CROSS JOIN Table2

Or more simply

SELECT Table1_ID, FKey_Table2_ID, Table2_ID, Table2_Value
FROM Table1, Table2

Answer 2

SELECT * FROM Table1
CROSS JOIN
Table2