Insert 2 select in same insert SQL

Question

i have a problem, i would like use 2 select to insert in new table but i don't know if it's possible...

my code :

insert INTO attributs_libres_lignes VALUES  ( SELECT LIGN_PKID, "INSERT HERE" from ATTRIBUTS_LIGNES a, "HERE THE NUMBER OF COLUMN OF PKID (1 to 4)", "HERE A DATE");

select COLONNE01 from attributs_lignes
union all select COLONNE02 from attributs_lignes
union all select COLONNE03 from attributs_lignes
union all select COLONNE04 from attributs_lignes

I would like insert the second part ( select COLONNE01....) in the first part instead of "INSERT HERE"

DATA OLD TABLE : COLUMNS 1 ("PKID1", one","two","three") COLUMNS 2 ("PKID2","one","two", "three")

New TABLE :

(PKID1, one, 1) (PKID2, one, 1) (PKID1, two, 2) (PKID2, two, 2) (PKID1, three, 3) (PKID2, three, 3)

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Answer 1

Isn't that just as simple as this?

insert into attributs_libres_lignes
select lign_pkid, colonne01 from attributs_lignes union all
select lign_pkid, colonne02 from attributs_lignes union all
select lign_pkid, colonne03 from attributs_lignes union all
select lign_pkid, colonne04 from attributs_lignes;