两个 SELECT 语句之间的 MySQL 笛卡尔积
我想在两个 SELECT 语句之间执行笛卡尔积
I want to perform a cartesian product between two SELECT statements as
SELECT 1, 2 INNER JOIN SELECT 3, 4 ;
我希望结果是 (1,2) 和 (3,4) 的每个组合，例如:
I expect the result to be every combination of (1,2) with (3,4), like:
1 3
2 3
1 4
2 4
推荐答案
您可以使用 CROSS JOIN 子句
You can use the CROSS JOIN clause
SELECT MyTable1.Col1, MyTable2.Col2
FROM MyTable1
CROSS JOIN MyTable2
其中 MyTable1 有两行包含 1 和 2；MyTable2 有两行包含 3 和 4.
where MyTable1 has two rows containing 1 and 2; and MyTable2 has two rows containing 3 and 4.
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