how would the SELECT to return only records with more than one
occurrences of id_table1? example:
-- Table1
-- id --
-------------------------
1
2
-- Table2
id --- | id_table1 | name
----------------------------------------------
4 ---- | ----- 1 ------ | Tom
5 ---- | ----- 1 ------ | Luci
6 ---- | ----- 2 ------ | Cleber ------>this can not return