比较2个表对应数据是否相同用full join
SQL> select * from l;
STR V
------ -
left_1 1
left_2 2
left_3 3
left_4 4
SQL> create table l2 as select * from l where l.v in (1,2,3);
Table created.
SQL> select * from l2;
STR V
---- ...
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