On Jun 17, 2014, at 11:01 PM, David M. Cotter <d...@kjams.com> wrote:
> also: if this query isn't *very* fast, then i'm fine with just "give me the > value of the first cell where there is data in that column" > > in the below case, i'd get a "1". > i would then proceed to delete everything with a "1" in it (from this and > other tables) > then i'd ask again, this time i'd get a 4, repeat above > then ask again, get nothing, and i'd be done > > On Jun 17, 2014, at 10:54 PM, David M. Cotter <d...@kjams.com> wrote: > >> i have a table with a numeric column (not the key column) >> i want to obtain from this table a list of unique numbers appearing in that >> one column >> >> some cells in the column may have nothing, some may have duplicate numbers >> eg: >> >>> 1 >>> 1 >>> 1 >>> 4 >>> _ >>> _ >>> 4 >>> _ >> >> note that "_" means "no data". i want to get a list with [1, 4] as the >> result. what is the proper SQLite query for this? You want "distinct": select distinct column from table where column is not null; or "group by": select column from table where column is not null group by column; Regards, Bradley Giesbrecht (pixilla)
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