Re: PG Unpivot ?

Wow !
That did it, even with the predicate I stuck on the end when I tried it.

Thanks Depesz !

On Mon, Nov 3, 2025 at 12:22 PM hubert depesz lubaczewski <depesz(at)depesz(dot)com>
wrote:

> On Mon, Nov 03, 2025 at 12:18:55PM -0500, dfgpostgres wrote:
> > psql (13.2, server 15.3) on linux
> >
> > I think they call this "unpivot" in MSSQL ?
> >
> > How can I get an sql query to return one line per column with... an ID,
> > column name and value. the ctid for the id field is fine.
> >
> > Example:
> > dvdb=# create table unpivot (intcol integer, floatcol float, strcol
> > varchar);
> > CREATE TABLE
> > dvdb=# insert into unpivot (intcol,floatcol,strcol) values
> > (1,1.1,'one'),(2,2.2,'two'),(3,3.3,'three');
> > INSERT 0 3
> > dvdb=# select * from unpivot;
> > intcol | floatcol | strcol
> > --------+----------+--------
> > 1 | 1.1 | one
> > 2 | 2.2 | two
> > 3 | 3.3 | three
> > (3 rows)
> > I want 9 records returned, each row with 3 cols, 1st col is the ctid,
> > second is the column name, third is the val.
>
> I think it should work:
>
> select u.ctid, e.* from unpivot u, to_jsonb(u) j, jsonb_each_text(j) e;
>
> Best regards,
>
> depesz
>
>