INSERT與GROUP BY在VALUE SELECT語句 - ERROR 1111（HY000）：無效使用組功能的

Question

我試圖通過ID分組，然後將它們插入到具有以下查詢另一個表後計算不同的值：

INSERT INTO table_aggregate 
    (id_aggregate, aggregate_column) 
(SELECT id_detail, COUNT(DISTINCT(detail_column)) 
    FROM table_detail 
    GROUP BY id_detail) 
ON DUPLICATE KEY UPDATE 
    aggregate_column = COUNT(DISTINCT(detail_column)); 

在運行時出現錯誤：

ERROR 1111 (HY000): Invalid use of group function

如果我運行它工作正常查詢的SELECT語句部分。爲什麼拋出這個錯誤？

Answer 1

在UPDATE部分中不能使用COUNT。使用VALUES(aggregate_column)來代替：

INSERT INTO table_aggregate 
    (id_aggregate, aggregate_column) 
(SELECT id_detail, COUNT(DISTINCT(detail_column)) 
    FROM table_detail 
    GROUP BY id_detail) 
ON DUPLICATE KEY UPDATE 
    aggregate_column = VALUES(aggregate_column); 

http://rextester.com/KTEDM89215

Answer 2

你可以把聚集的子查詢中。然後，你可以參考的計算值在update

INSERT INTO 
    table_aggregate (id_aggregate, aggregate_column) 
    SELECT 
     * 
    FROM 
     (
      SELECT 
       id_detail, 
       COUNT(DISTINCT(detail_column)) AS count 
      FROM 
       table_detail 
      GROUP BY 
       id_detail 
     ) AS aggr 
ON DUPLICATE KEY 
UPDATE 
    aggregate_column = aggr.count