如何创建子类别SQL BIGQUERY标准

如何在Bigquery中使用此标准sql创建子类别。我错过了什么

我收到错误“列名MVA\U ID在[2:1]处不明确”

我收到错误“列名MVA\U ID在[2:1]处不明确”

我收到错误“列名MVA\U ID在[2:1]处不明确”
... 我错过了什么

---

很可能您打算使用

UNION ALL

而不是

CROSS-JOIN

（逗号是CROSS-JOIN的快捷方式）-如果您修复了上述错误，则可以避免：o）

谢谢您的建议。它正在工作。非常感谢。

SELECT
MVA_ID AS MVA_ID,
ITEM_NAME AS ITEM_NAME,
PROGRAM_PMD AS PROGRAM_PMD, 
PRODUCT AS PRODUCT,
COUNTRY AS COUNTRY,
MILESTONE AS MILESTONE,
--SUBCATEGORIZATIONS Names
Category AS Category,
SubCategory AS SubCategory,
Measures AS Measures,

FROM
    --LABOR COST
    (SELECT * FROM
        (SELECT
            MVA_ID,
            ITEM_NAME,
            PROGRAM_PMD, 
            PRODUCT,
            COUNTRY,
            MILESTONE,
            "LABOR" AS Category,
            "Rate" AS SubCategory,
            SMT_IDL_RATE AS Measures,
            FROM `xxxxx`
          ) MVA
    )
 ,
    (SELECT * FROM
        (SELECT
            MVA_ID,
            ITEM_NAME,
            PROGRAM_PMD, 
            PRODUCT,
            COUNTRY,
            MILESTONE,
            "LABOR" AS Category,
            "Hours" AS SubCategory,
            SMT_LINE_TOOLING_COST AS Measures,
            FROM `xxxx`
      ) MVA
    )