Question

I tried to implement the following mysql command try to get rows with none null values,

here is the table tbtext:

  id       text
     1 
     2     number2
     3     number3
     4     


   create table tbtext(
     id unsigned int auto_increment primary key,
     text char(7)
      )

I tried select * from tbtext where text is not null, but it returns the whole rows and doesn’t return row 3 and row 4. I am new to mysql, can anyone help me with it, thanks in advance.

Answer 1

I’m assuming text contains empty strings, and not NULL. The best thing to do would be to replace those empty strings with NULL, but you could also use this query :

-- ...
WHERE text <> '';

Please note however that empty strings are information, where NULL means lack of information. You should definitely not have empty strings if that’s not what you’re trying to do.