Sql 使用另一个表更新表，该表采用第二个表的列名称

我有一个表要用另一个表更新。问题是要更新的列名包含在结果select中

我尝试了许多不同的方法，在stackoverflow中处理了这些案例，但没有成功

CREATE TABLE #tableA (
  TA int
  , FM int
  , YTM int
  , YTW int
  , FFH int
  , TCWH int
  , BRH int
  , DH int
  , DV int
  , BN int
  , PP int
);

select * from #tableA;

CREATE TABLE #TableB (
  footnote VARCHAR(20) NOT NULL
  , row_ref int NOT NULL
);

INSERT INTO #TableB (footnote, row_ref)
  VALUES ('TA', 1),
       ('FFH', 2),
       ('BRH', 7);

---

我们的想法是使用TableB中的值更新TableB中定义的TA、FFH和BRH列中的tableA，如果您希望TableB中的每一行对应tableA中的一行，那么应该这样做

INSERT INTO #tableA
(TA, FM, YTM, YTW, FFH, TCWH, BRH, DH, DV, BN, PP)
SELECT IIF(footnote = 'TA', row_ref, NULL)   AS TA
     , IIF(footnote = 'FM', row_ref, NULL)   AS FM
     , IIF(footnote = 'YTM', row_ref, NULL)  AS YTM
     , IIF(footnote = 'YTW', row_ref, NULL)  AS YTW
     , IIF(footnote = 'FFH', row_ref, NULL)  AS FFH
     , IIF(footnote = 'TCWH', row_ref, NULL) AS TCWH
     , IIF(footnote = 'BRH', row_ref, NULL)  AS BRH
     , IIF(footnote = 'DH', row_ref, NULL)   AS DH
     , IIF(footnote = 'DV', row_ref, NULL)   AS DV
     , IIF(footnote = 'BN', row_ref, NULL)   AS BN
     , IIF(footnote = 'PP', row_ref, NULL)   AS PP
FROM   #TableB;

---

所以您希望只插入一行？

insert into #tableA ([TA],[FFH],[BRH])
select [TA],[FFH],[BRH]
from #TableB
pivot (max(row_ref) for footnote in ([TA],[FFH],[BRH])) pvt