php - sql连接

Question

我可以连接如下查询吗？如果没有，我应该如何进行？我不想从中读取行，$retrieveUnitExist因为它浪费了另一个步骤。

$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";