Question

我是postgres的新手。我有一个查询

SELECT * FROM orders
LEFT OUTER JOIN order_details ON order_details.orderid= orders.orderid

它得到错误

SQL error:

ERROR:  column order_details.orderid doesn't exist
LINE 2:       LEFT OUTER JOIN order_details ON order_details.orderid...
                                           ^
In statement:

SELECT COUNT(*) AS total FROM (SELECT * FROM orders
 LEFT OUTER JOIN order_details ON order_details.orderid= orders.orderid) AS sub

我的查询中缺少什么？先谢谢

Answer 1

Postgres区分大小写。您的SQL语句必须是正确的情况，如果表名或列名不是小写，则必须用双引号将其括起来。（如下图所示）

  SELECT * FROM orders
LEFT OUTER JOIN order_details ON order_details."OrderID"= orders.orderid

postgresql左外连接列不存在

1 个答案: