我正在尝试运行这样的查询:
WITH cte AS
(
SELECT id, category, SUM(amount) AS sum_amount FROM t1 GROUP BY id, category
)
UPDATE table SET amount = cte.sum_amount WHERE id = cte.id;
但是,我不断收到错误消息
Unknown column 'cte.id in WHERE clause'
有人知道我如何在UPDATE查询中引用我的公用表表达式,否则可以重写它?
答案 0 :(得分:2)
您可以在下面尝试
WITH cte AS
(
SELECT id, SUM(amount) AS sum_amount FROM t1 GROUP BY category
)
UPDATE T
SET T.sum_amount= CT.sum_amount
FROM table T
JOIN cte CT
ON T.id = CT.id
答案 1 :(得分:0)
Alternate way with Temporary table, you can read about CTE and Temporary Table
Temporary table:
SELECT id, category, SUM(amount) AS sum_amount
INTO #temp
FROM t1 GROUP BY id, category
Update query with temp table:
UPDATE OT
SET OT.sum_amount= TT.sum_amount
FROM table OT
JOIN #temp TT
ON OT.id = TT.id
CTE:
WITH cte AS
(
SELECT id, category, SUM(amount) AS sum_amount FROM t1 GROUP BY id,category
)
UPDATE T
SET T.sum_amount= CT.sum_amount
FROM table T
JOIN cte CT
ON T.id = CT.id