Hi,
Yes it's possible in where clause.
exemple:
create table t1 (id integer,name varchar(55));
create table t2 (id integer,name varchar(55));
insert into t1 values (1,'toto');
INSERT 25005844 1
log=# insert into t1 values (2,'titi');
INSERT 25005845 1
log=# insert into t2 values (1,'ttttttttt');
INSERT 25005846 1
log=# insert into t2 values (2,'jjjjjjjjj');
INSERT 25005847 1
log=# update t2 set nom2 = 'yyyyyyyyy' where t1.id = t2.id and t1.name = 'toto';
UPDATE 1
You just have to specify join in where clause.
Cheers,
PEJAC pascal