在the中,我可以执行以下操作:FROM (SELECT 1 AS n UNION ALL SELECT 2 AS n) AS t;IBM用于i5/OS的DB2SQL0199 -关键字联合没有预料到。实际上,一个可还原的SQL语句,如:还有以下错误:
IBM用于i5/OS的DB2SQL0104 -令牌无效。有效的令牌:,从INTO。有一个U
我需要使用cust_name从所有这些表中查找cust_location。如何在oracle SQL中编写查询?select cust_id, cust_name from customer select cust_name as cust_location from tb1 select cust_name as cust_location from tbl2 select c