All we need is an easy explanation of the problem, so here it is.
I have the query of
INSERT IGNORE INTO t2 (ID,P1,P2,Items) SELECT ID,P1,P2,SUM(Items) FROM t1 GROUP BY ID,P1,P2;
Since I need to run this query frequently to inspect changes in
t1, I need to add
ON DUPLICATE KEY UPDATE t2.Items=SUM(t1.Items)
but it gives
ERROR 1111 (HY000): Invalid use of group function error.
How to solve :
I know you bored from this bug, So we are here to help you! Take a deep breath and look at the explanation of your problem. We have many solutions to this problem, But we recommend you to use the first method because it is tested & true method that will 100% work for you.
Like all functions you need to make a further select with the data
And please next time provide a minimal reproducible example, so that the answer can be doe quicker and with much less effort
CREATE TABLe t2 (ID INT primary key,P1 INT,P2 INT ,Items INT )
INSERT INTO t2 VALUES (1,1,1,1)
CREATE TABLe t1 (ID INT primary key,P1 INT,P2 INT ,Items INT )
INSERT INTO t1 VALUES (1,1,2,2)
INSERT IGNORE INTO t2 (ID,P1,P2,Items) SELECT ID,P1,P2, t1sum FROM (SELECT ID,P1,P2,SUM(Items) t1sum FROM t1 GROUP BY ID,P1,P2) t3 ON DUPLICATE KEY UPDATE t2.Items=t3.t1sum✓
SELECT * FROM t2ID | P1 | P2 | Items -: | -: | -: | ----: 1 | 1 | 1 | 2
DUPLICATE KEY UPDATE you can use the
VALUES(columnname) syntax to access the value of the column to be inserted:
INSERT INTO t2 (ID, P1, P2, Items) SELECT ID, P1, P2, SUM(Items) FROM t1 GROUP BY ID,P1,P2 ON DUPLICATE KEY UPDATE t2.Items = VALUES(Items) ;
Note: Use and implement method 1 because this method fully tested our system.
Thank you 🙂