Question

这是我的代码：

SELECT account_name,
    count(ordered_item),
    ROW_NUMBER() OVER (
        PARTITION BY account_name, ordered_item 
        ORDER BY count(ordered_item) DESC
        ) Row
FROM oe_order_lines_all ool,
    cust_accounts_all hca,
    oe_order_headers_all ooh
WHERE to_date(ooh.creation_date) BETWEEN '2015-10-01' AND '2015-10-31'
    AND ooh.flow_status_code <> 'CANCELLED'
    AND ooh.sys_document_ref = ool.sys_document_ref
    AND hca.cust_account_id = ooh.org_id
GROUP BY hca.account_name,
    ool.ordered_item
ORDER BY ool.ordered_item DESC

我一直收到错误＆＃34; FROM关键字未找到预期位置＆＃34;。我不确定我的语法有什么问题。我试图查看哪个帐户（有多个具有相同名称，即亚马逊）的订单项最多。还有其他方法可以找到这些信息吗？我的代码中有什么错误？

提前感谢您的帮助！

Answer 1

当前问题是ROW是a reserved word。如果您将该列别名更改为其他错误将会消失的内容。

但是您可能希望子查询获取每个帐户名的计数，然后将分析函数应用于该结果 - 没有PARTITION BY子句将对所有内容进行排名：

SELECT account_name, ordered_items,
  ROW_NUMBER() OVER (
      ORDER BY ordered_items DESC
      ) rn
FROM (
  SELECT hca.account_name,
    count(ordered_item) ordered_items
  FROM oe_order_headers_all ooh
  JOIN oe_order_lines_all ool
  ON ooh.sys_document_ref = ool.sys_document_ref
  JOIN cust_accounts_all hca
  ON hca.cust_account_id = ooh.org_id
  WHERE to_date(ooh.creation_date) BETWEEN DATE '2015-10-01' AND DATE '2015-10-31'
  AND ooh.flow_status_code <> 'CANCELLED'
  GROUP BY hca.account_name
)
ORDER BY rn DESC;

如果你只想要一个计数最高的那个你可以有更高的水平：

SELECT account_name, ordered_items
FROM (
  SELECT account_name, ordered_items,
    ROW_NUMBER() OVER (
        ORDER BY ordered_items DESC
        ) rn
  FROM (
    SELECT hca.account_name,
      count(ordered_item) ordered_items
    FROM oe_order_headers_all ooh
    JOIN oe_order_lines_all ool
    ON ooh.sys_document_ref = ool.sys_document_ref
    JOIN cust_accounts_all hca
    ON hca.cust_account_id = ooh.org_id
    WHERE to_date(ooh.creation_date) BETWEEN DATE '2015-10-01' AND DATE '2015-10-31'
    AND ooh.flow_status_code <> 'CANCELLED'
    GROUP BY hca.account_name
  )
)
WHERE rn = 1;

但ROW_NUMBER()可能不合适。您没有指定如果两个帐户具有相同的计数会发生什么。如果你只想显示其中一个，你需要一种方法来选择使用哪个，你可以通过在函数的ORDER BY子句中添加一个tie-braker来做。如果您想要同时显示两者，请改为使用RANK()。

（我也切换到ANSI连接;并使用日期文字，因此您不依赖于NLS设置。）

SQL Fiddle demo

Answer 2

我认为您需要执行子查询

SELECT  account_name,
        ordered_item, 
        ROW_NUMBER() OVER (ORDER BY Total DESC) as rn
FROM (
     SELECT hca.account_name,
            ool.ordered_item, 
            COUNT(*) as total
     FROM oe_order_lines_all ool 
     JOIN oe_order_headers_all ooh
       ON ooh.sys_document_ref = ool.sys_document_ref    
     JOIN cust_accounts_all hca 
       ON hca.cust_account_id = ooh.org_id
     WHERE to_date(ooh.creation_date) BETWEEN '2015-10-01' AND '2015-10-31'
       AND ooh.flow_status_code <> 'CANCELLED'    
     GROUP BY 
           hca.account_name,
           ool.ordered_item
   ) T
ORDER BY ordered_item DESC

哪个帐号的订单最多？ SQLdev

2 个答案: