[英]Update table using result of another query
I have the following query that works fine我有以下查询可以正常工作
SELECT RecordID, ROW_NUMBER() OVER (ORDER BY (Value1) DESC) AS Rank
FROM Table1
Also, I have another table(table2) that contains (among others) the fields RecordID and Rank.此外,我还有另一个表(table2),其中包含(除其他外)RecordID 和 Rank 字段。 I would like to update RecordID and Rank in table2 based on result of query above.我想根据上面的查询结果更新 table2 中的 RecordID 和 Rank。 Is that possible?那可能吗?
Yes, you can have multiple tables in an update
in Postgres:是的,您可以在 Postgres 的update
中包含多个表:
update table2
set rank = t1.rank
from (SELECT RecordID, ROW_NUMBER() OVER (ORDER BY (Value1) DESC) AS Rank
FROM Table1
) t1
where table2.RecordId = t1.RecordId;
What worked for me (in mysql
) was :对我mysql
(在mysql
)是:
update table2, (SELECT RecordID, ROW_NUMBER() OVER (ORDER BY (Value1) DESC) AS Rank
FROM Table1) tempTable
set table2.Rank = tempTable.Rank
where table2.RecordId = tempTable.RecordId;
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