SQL how create a Boolean column based on the value of another column

Question

I have an sql query that retrieves a column which values are strings. I want to create a column next to it that takes a value of 1 if the substring 'MB' is contained in the value or 0 otherwise

Answer 1

You can try it using the case when then like this:

select case when INSTR('mycol', 'MB') > 0 then 1 
       else 0 
       end as myBoolCol

Answer 2

You can output another column with a calculated value like this:

select COLUMN, IF(LOCATE('MB', COLUMN) > 0, 1, 0) as STR_FOUND
  from TABLE

See the documentation of locate and if for further Information.

Answer 3

select column, 
       case when column like '%mb%' then 1
       else 0 end 
from table

This works for both MSSQL and MYSQL