Actualización con Postgres Inner Join
update xtable x
set col1 = y.col1
from ytable y
where y.x_id = x.id;
GutoTrosla
update xtable x
set col1 = y.col1
from ytable y
where y.x_id = x.id;UPDATE T1, T2,
[INNER JOIN | LEFT JOIN] T1 ON T1.C1 = T2. C1
SET T1.C2 = T2.C2,
T2.C3 = expr
WHERE condition
select *
from tableA a join
tableB b
on a.id like '%' + b.id + '%';