mysql - SQL中的格式化列

Question

I would like to insert the pipe character | in a column to separate two sections of the output. Is there a way to put one in every row of a column as long as there is data in that row?

Answer 1

select   column1, 
         column2,
         case 
           when column3 is not null 
           then '|' 
           else '' 
         end
from your_table

Answer 2

不是每列都起作用的。您将不得不为每一列重复它。

像这样的东西；

SELECT CASE col IS NULL THEN NULL ELSE CONCAT('|', col) END CASE FROM Table