How to update column

TestudinateklevTestudinateklev Registered User

Dear All,

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.

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