我该怎么做

Question

`

SELECT TXNID,
       TOTAL_AMOUNT,
       ACCOUNT_CATEGORY,
       DEBIT 
FROM ACCOUNTING_BOOK 
  WHERE TXNID like 'M003%' ;

TXNID:M003 TOTAL_AMT:25 ACCOUNT_CATEGORY:Revenue Debit:null Credit:null

TXNID:M003 TOTAL_AMT:25 ACCOUNT_CATEGORY:Asset Debit:null Credit:null

借方栏填写规则：[Total-Amount if account-category=Expense or if account-category=Asset for对应的TxnId匹配的Revenue项目；否则为 0]

想要将此表内的结果验证到借方列。我该怎么做？

信用栏填写规则：[Total-Amount if account-category=Revenue or if account-category=Asset for对应的Expense item对应TxnId将返回1； 0否则] 想把这个表里面的结果验证到credit栏里，怎么办？

Answer 1

如果我理解正确的规则：

update accounting_book ab
  set debit = case when account_category in ('Expense', 'Asset')
                   then (select sum(total_amt)
                           from accounting_book 
                           where account_category = 'Revenue'
                             and txnid = ab.txnid)
                   else 0
              end

---

编辑：

填充信用栏的规则：[Total-Amount if account-category=收入或者如果 account-category=Asset for 与 TxnId 匹配的对应 Expense 项将返回 1 ； 0 否则]

与之前的更新类似：

update accounting_book ab
  set credit = case when account_category in ('Revenue', 'Asset')
                     and exists (select 1  
                                   from accounting_book 
                                   where account_category = 'Expense'
                                     and txnid = ab.txnid)
                    then 1
                    else 0
               end

Answer 2

     CASE WHEN A.ACCOUNTCATEGORY IN('Revenue','Asset')
              AND EXISTS (SELECT TOTAL_AMOUNT
              FROM ACCOUNTING_BOOK
              WHERE ACCOUNTCATEGORY='Expense'
              AND TXNID=A.TXNID)
              THEN A.TOTAL_AMOUNT
              ELSE 0
              END, 

               CASE WHEN A.ACCOUNTCATEGORY IN('Expense','Asset')
              AND EXISTS (SELECT TOTAL_AMOUNT
              FROM ACCOUNTING_BOOK
              WHERE ACCOUNTCATEGORY='Revenue'
              AND TXNID=A.TXNID)
              THEN A.TOTAL_AMOUNT
              ELSE 0
              end);


 END LOOP;
 END;
 /