在 Oracle 中使用增强的聚合报告功能解决问题

Posted 2023-05-09

【中文标题】在 Oracle 中使用增强的聚合报告功能解决问题

【英文标题】：Solving problem using enhanced aggregate reporting functions in Oracle

【发布时间】：2019-02-22 17:42:31

【问题描述】：

我正在使用 sqlplus (oracle)。 我试图写一个语句来显示基于所有交易价值的账户价值变化

每个 customer_account_combination 每位客户 全行

此外，借方交易应为负数，贷方交易应保持为正数。 我需要在 oracle 中使用增强的聚合报告功能来解决它​​。 另外，应该有客户总数和总计。

这是我到目前为止所得到的。

select wc.first_name "First", wc.surname "Last", wt.account_type "Act Type" 
case when wt.transaction_type is NULL then NULL 
    when wt.transaction_type = 'D'then TO_CHAR(transaction_amount*-1, '$9,999.99') 
    else TO_CHAR(transaction_amount, '$9,999.99') 
    end "Total" 
from wgb_customer wc join wgb_account wa on wa.customer_number = wc.customer_number join wgb_account_type wt on wa.account_type = wt.account_type
left outer join wgb_transaction wt on wt.customer_number = wa.customer_number 
and wt.account_type = wa.account_type
order by 2,3,6;

但是，它不起作用，并且不显示客户总数或总计。 请帮忙！

ERD

预期输出

【问题讨论】：

现在不在我的电脑后面向您展示示例，但您正在寻找的是“GROUP BY CUBE”或“GROUP BY ROLLUP”。它允许您开箱即用地生成小计和总计。

选择 wc.first_name "First", wc.surname "Last", wa.account_type "Type", SUM(transaction_amount) AS wt.transaction_type 为 NULL 时的总情况，然后 wt.transaction_type = NULL 'D'then TO_CHAR(transaction_amount*-1, '$9,999.99') else TO_CHAR(transaction_amount, '$9,999.99') end "Total" from wgb_customer wc, wgb_account wa, wgb_transaction wt where wc.customer_number=wa.customer_number and wa.account_type= wt.account_type GROUP BY ROLLUP (first_name, surname, account_type, transaction_amount) order by 2,3;

我想出了上面的评论，但它不起作用:(

提供样本输入和预期输出。

我已将预期输出附加为图像

【参考方案1】：

GROUP BY ROLLUP 是要走的路。它允许您创建所有可能的小计和总计。聚合数据后，您只需将连接保留到客户表以检索 first_name 和 last_name。确保进行左连接，以免丢失总数

--SAMPLE TABLES AND TEST DATA 

  CREATE TABLE WGB_TRANSACTION (
    CUSTOMER_NUMBER VARCHAR2(7),
    ACCOUNT_TYPE NUMBER(1),
    TRANSACTION_AMOUNT NUMBER,
    TRANSACTION_TYPE VARCHAR2(1)
  );

  CREATE TABLE WGB_CUSTOMER (
    CUSTOMER_NUMBER VARCHAR2(7),
    FIRST_NAME VARCHAR2(30),
    SURNAME VARCHAR2(30)
   );

INSERT INTO WGB_CUSTOMER VALUES ( '123', 'John','Smith');
INSERT INTO WGB_CUSTOMER VALUES ( '456', 'James','Anderson');
INSERT INTO WGB_TRANSACTION VALUES (123,1,100,'C');
INSERT INTO WGB_TRANSACTION VALUES (123,1,50,'D');
INSERT INTO WGB_TRANSACTION VALUES (123,2,100,'C');
INSERT INTO WGB_TRANSACTION VALUES (456,1,50,'C');
INSERT INTO WGB_TRANSACTION VALUES (456,1,100,'C');
INSERT INTO WGB_TRANSACTION VALUES (456,3,100,'D');
INSERT INTO WGB_TRANSACTION VALUES (456,1,50,'C');

--The Query 
WITH BALANCES AS (
    SELECT CUSTOMER_NUMBER, ACCOUNT_TYPE, 
    SUM(DECODE(TRANSACTION_TYPE,'D',-1,'C',1,0)*TRANSACTION_AMOUNT) BALANCE
    FROM WGB_TRANSACTION WHERE TRANSACTION_TYPE IN ('C','D') 
    GROUP BY ROLLUP ( CUSTOMER_NUMBER, ACCOUNT_TYPE )
)
SELECT C.FIRST_NAME, C.SURNAME, B.ACCOUNT_TYPE, TO_CHAR(B.BALANCE,'$9,999.99')
FROM BALANCES B LEFT JOIN WGB_CUSTOMER C ON C.CUSTOMER_NUMBER=B.CUSTOMER_NUMBER;

--RESULT 
FIRST_NAME  SURNAME ACCOUNT_TYPE    TO_CHAR(B.BALANCE,'$9,999.99')
John    Smith   (null)  $150.00
John    Smith   2   $100.00
John    Smith   1   $50.00
James   Anderson    (null)  $100.00
James   Anderson    3   -$100.00
James   Anderson    1   $200.00
(null)  (null)  (null)  $250.00

【参考方案2】：

使用联合

    select wc.first_name "First", wc.surname "Last", wt.account_type "Act Type" 
    case when wt.transaction_type is NULL then NULL 
        when wt.transaction_type = 'D'then TO_CHAR(transaction_amount*-1, '$9,999.99') 
        else TO_CHAR(transaction_amount, '$9,999.99') 
        end "Total" 
    from wgb_customer wc join wgb_account wa on wa.customer_number = wc.customer_number join wgb_account_type wt on wa.account_type = wt.account_type
    left outer join wgb_transaction wt on wt.customer_number = wa.customer_number 
    and wt.account_type = wa.account_type
union 
 select '','',TO_CHAR(total,'$9,999.99') from 
(
select  
       sum ( case when wt.transaction_type is NULL then 0
        when wt.transaction_type = 'D' then transaction_amount*-1 
        else transaction_amount
        end ) as total
    from wgb_customer wc join wgb_account wa on wa.customer_number = wc.customer_number join wgb_account_type wt on wa.account_type = wt.account_type
    left outer join wgb_transaction wt on wt.customer_number = wa.customer_number 
    and wt.account_type = wa.account_type
) t