Question

I have table with structure like this:

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|  id  |  tid  | uid |   title   |   time    |
 --------------------------------------------
|  1   |   3   | 15  |           |   120333  |
 --------------------------------------------
|  2   |   3   | 15  | Lorem ip..|   120394  |
 --------------------------------------------
|  3   |   3   | 15  |           |   120344  |
 --------------------------------------------
|  4   |   2   | 15  | Lorem ip..|   128994  |
 --------------------------------------------
|  5   |   2   | 15  | Lorem ip..|   126782  |
 --------------------------------------------

And i have query like this (it selects all records with “uid” – user id that is 15):

SELECT * FROM my_table WHERE uid = :uid GROUP BY tid ORDER BY time DESC

Thos works fine, BUT u have one problem: “title” row is often empty when i display results of this query. (note: for every “tid” number there must be at least one “title”)

How can i force this query to always display title, so it is never empty?

Answer 1

IF you want to take an arbitrary value for the Title field, or if they are all the same, you could do a MIN() on that column. MIN will omit nulls.