Question

I have two tables both having same column and but different no of rows.

Generation
{Date,
location,
location_id,
turbine_id,
Generation,}

Generation_copy
{date,
location,
location_id,
turbine_id,
Generation}

In Generation table i have 5000 rows which have rows up to date and in Generation_copy i have only 4500 rows which i haven’t updated the table for last one week

Now i need to fill the unfilled 500 rows into table Generation_copy.

Answer 1

 insert into generation_copy 
  select * from generation where (date,location)
  not in 
 (select date,location from generation_copy )