SQL Case语句的2+列的值大于1

Question

I need to add the values in a row from three columns. When the value is greater than 1, it needs to populate a specific phrase.

So ... example

From temp_table_tx = count_of_x    
From temp_table_ty = count_of_y    
From temp_table_tz = count_of_z

I currently have the following, which only gives me an error.

CASE 
    WHEN (tx.count_of_x + ty.count_of_y + tz.count_of_z) >1 THEN 'Exception_present'
    WHEN (tx.count_of_x + ty.count_of_y + tz.count_of_z) <1 THEN  'No_Exceptions'
ELSE 'error'
End As exceptions

Answer 1

You would get 'error' if any counts were NULL . So, this might fix your problem:

(CASE WHEN coalesce(tx.count_of_x, 0) + coalesce(ty.count_of_y, 0) + coalesce(tz.count_of_z, 0) > 1
      THEN 'Exception_present'
      WHEN coalesce(tx.count_of_x, 0) + coalesce(ty.count_of_y, 0) + coalesce(tz.count_of_z, 0) < 1 THEN 'No_Exceptions'
      ELSE 'error'
 END) As exceptions

It seems odd, though, that a count of exactly "1" would be considered an error.