mysql - 如何使用其他参数进行 SQL INSERT CROSS JOIN

Question

我正在编写一个查询以将数据插入表中。此查询必须从两个单独的表中选择某些 id 以及传入的参数。我能够使用 CROSS JOIN 从两个单独的表中获取数据。但是，我不确定如何传入字符串作为我的第三个参数。以下是我的发言:

INSERT INTO TABLE1 (T2_ID, T3_ID)
SELECT T2_ID, T3_ID
FROM (SELECT T2_ID FROM TABLE2 WHERE TABLE2.NAME = 'BOB') AS T1
CROSS JOIN(SELECT T3_ID FROM TABLE3 WHERE TABLE3.DATA = 'BLARGH') AS T2;

我从交叉连接中获取了所需的 ID，但我还需要传入一个字符串值参数。我该如何传递这个呢？预先感谢您。

Answer 1

您可以在选择中添加一个字符串:

INSERT INTO TABLE1 (T2_ID, T3_ID, <col>)
SELECT T2_ID, T3_ID, 'a string' 
FROM (SELECT T2_ID FROM TABLE2 
      WHERE TABLE2.NAME = 'BOB') AS T1
CROSS JOIN(SELECT T3_ID 
           FROM TABLE3 WHERE TABLE3.DATA = 'BLARGH') AS T2;

严格来说，您不需要子选择:

INSERT INTO TABLE1 (T2_ID, T3_ID, <col>)
SELECT T2_ID, T3_ID, 'a string' 
FROM TABLE2 AS T1 
CROSS JOIN TABLE3 AS T2
WHERE T1.NAME = 'BOB'
  AND T2.DATA = 'BLARGH'