Разменете стойностите на две колони между две таблици

Сега това може да е твърде опростено, но хей - това предполагат вашите примерни данни. Идеята е:обменяйте имена на таблици, а не данни. Разгледайте:

SQL> create table naveen_t1 (id number, name varchar2(20));

Table created.

SQL> create table naveen_t2 (id number, name varchar2(20));

Table created.

SQL> insert all
  2    into naveen_t1 values (1, 'GOLDI')
  3    into naveen_t1 values (2, 'NAVEEN')
  4    into naveen_t1 values (3, 'AMIT')
  5    --
  6    into naveen_t2 values (1, 'RANJAN')
  7    into naveen_t2 values (2, 'SOM')
  8    into naveen_t2 values (3, 'ABHAY')
  9  select * from dual;

6 rows created.

SQL> select * From naveen_t1;

        ID NAME
---------- --------------------
         1 GOLDI
         2 NAVEEN
         3 AMIT

SQL> select * From naveen_t2;

        ID NAME
---------- --------------------
         1 RANJAN
         2 SOM
         3 ABHAY

Ето трикът :

SQL> rename naveen_t2 to temp;

Table renamed.

SQL> rename naveen_t1 to naveen_t2;

Table renamed.

SQL> rename temp to naveen_t1;

Table renamed.

SQL> select * from naveen_t1;

        ID NAME
---------- --------------------
         1 RANJAN
         2 SOM
         3 ABHAY

SQL> select * From naveen_t2;

        ID NAME
---------- --------------------
         1 GOLDI
         2 NAVEEN
         3 AMIT

SQL>