sql连接

Question

我可以连接下面的查询吗？如果不是,我该怎么办？我不想读取行,$retrieveUnitExist因为它浪费了另一步.

$retrieveUnitExist = "SELECT unitid FROM ESTATEUNIT WHERE BLOCK = 1";
$insertAddress = "INSERT INTO ADDRESS (value1, value2) VALUES ('1','".$retrieveUnitExist."')";

mysqli_query($conn, $insertAddress);

Answer 1

像这样的东西？

$insertAddress = "INSERT INTO ADDRESS (value1, value2)
                  SELECT '1', unitid FROM ESTATEUNIT WHERE BLOCK = 1";