How to update column
Could you please advice me how I can update one column on my big table using values column on different table.
For example , I used MERGE JOIN operation but it is not work when I have duplicates
Also, I try to use this constructions :
ALTER TABLE facts.Orders_merge DROP COLUMN AppointedPhone;
ALTER TABLE facts.Orders_merge ADD COLUMN AppointedPhone varchar(64)
DEFAULT (SELECT AppointedPhone FROM facts.Orders_add_column_merge WHERE facts.Orders_add_column_merge.HashOrderId=facts.Orders_merge.HashOrderId);
HashOrderId - It is PK.
I can not drop this table facts.Orders_add_column_merge.
On my case I want to copy "AppointedPhone" from my stage table to big table fastly.
Thanks all in advance.