Question

I currently have some sql that brings back tags. they should have distinct ids, but they don’t…. so my current data is like:

Microsoft | GGG | 1 | 167
Microsoft | GGG | 1 | 2
Microsoft | GGG | 1 | 1

What i would like to do is have only one row come back with the final column concatenated into a delimited list like:

Microsoft | GGG | 1 | 167, 2, 1

I am using mySQL 5 for this.

Answer 1

Use GROUP_CONCAT() for this, with a GROUP BY covering the other three columns:

SELECT 
  name,   -- Microsoft
  other,  -- GGG
  other2, -- 1
  GROUP_CONCAT(id) AS ids
FROM tbl
GROUP BY name, other, other2