Rails update_all using an join and sum
91414
Mysql Update with table joins - update one table's field with sum of other table's field
53894
Multiple join conditions using the $lookup operator
68709
Ruby on Rails: updated_at - set as 0 on creation
82364
MySql update two tables at once
146176
Rails nested association and restarted numbering
103108
Applying aggregate function SUM together with GROUP BY
86775
Using  on a List doesn't update model values
43036
How to organically merge nested associations?
71416
mysql UPDATE statement - overhead for same values?
148262
How can I do an UPDATE statement with JOIN in SQL Server?
52570
How to do an update + join in PostgreSQL?
41821
How do I do reflexive self-join relationships in ActiveRecord?
129336
sum all values for table column based on class
28969
MySQL syntax for Join Update
118644
How to sum all column values in multi-dimensional array?
140337
Using an aggregate function in where
57793
Compile nested Sums