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BigQuery UPDATE from another table

Update rows using data from another table

UPDATE from table example

UPDATE myDataset.Inventory T\nSET quantity = n.quantity\nFROM (\nselect quantity, product from myDataset.NewArrivals\n)n\nWHERE i.product = n.product

Syntax reference

UPDATE target_name [[AS] alias]\nSET set_clause\n[FROM from_clause]\nWHERE condition\n\nset_clause ::= update_item[, ...]\n\nupdate_item ::= column_name = expression