Return Default value if no row found -mysql

Question

I\'m building query to search multiple rows from database like

SELECT 
  * 
FROM
  table1 
WHERE col1 = \'012311\' 
  OR col1 = \'0123631\' 
  OR col1 = \'0         


        

Answer 1

SELECT
     CASE WHEN col1 = NULL THEN "NULL" ELSE col1 END AS 'col1'
FROM table1
WHERE
     col1 = '012311'
     OR col1 = '0123631'
     OR col1 = '091233'
     OR col1 = '092111'

This might be along the lines of what you're looking for, format-wise. If col1 is NULL then return a string "NULL" (this can be substituted). If col1 is NOT NULL then return the valued result.

Hopefully this works!