Reference column without table name during table join
SQL> CREATE TABLE emp
2 (
3 cid NUMBER,
4 city VARCHAR2(30),
5 customer_state VARCHAR2(40),
6 country_id CHAR(2)
7 );
Table created.
SQL>
SQL> CREATE TABLE sales(
2 product_id NUMBER(6),
3 cid NUMBER,
4 sold NUMBER(3),
5 amount NUMBER(10,2),
6 cost NUMBER(10,2)
7 );
Table created.
SQL>
SQL> select product_id, sold, city, customer_state
2 from sales, emp
3 where sales.cid = emp.cid
4 and product_id = 117;
no rows selected
SQL>
SQL>
SQL> drop table emp;
Table dropped.
SQL> drop table sales;
Table dropped.
SQL>
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