group_concat trouble with a query

group_concat trouble with a query

I am having trouble with line breaks being inserted into group_concat string when the value is non-existent (null).

So here's the (joined) table, for example:

Letter | Number
A | 1
B | 2
C | null
D | 4
E | null
F | 2

so if I do:

group_concat(DISTINCT "Number" SEPARATOR ', ')

I would expect result being: '1, 2, 4'

However, whatever I tried, I am getting:

1, 2
, 4

Can anyone help?

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