使用 SAS 中的 PROC SQL 查询财务余额？

Question

我有两张表，先叫它“交易”

交易编号	交易类型	数量
101	1	50.00
102	2	25.00
103	3	35.00
104	2	15.00
105	1	60.00

第二个叫它“transaction_types”

ID	描述
1	订金
2	退休
3	内部事务

“transaction_types”表中的“id”列，对应第一个表中的“transsaction_id”

假设初始余额为 100,000.00 美元。 我应该写一个查询来获取历史账户余额。 我应该展示的表格是这样的：

交易编号	初始余额	订金	退出	最终平衡
101	100000	50.00		100050
102	100050		25.00	100025
103	100025			100025
...	...	...	...	...

我使用 PROC SQL 在 SAS 中编写此代码：

TITLE "Balance Historico de la Wallet Empresarial";
PROC SQL;
    SELECT transaction_id,
           100000 AS initial_balance FORMAT=DOLLAR32.2,
           "" AS deposit,
           "" AS withdrawal,
           "" AS final_balance
    FROM _LIB.TRANSACTIONS;
QUIT;

但我不知道如何填充其他列。

Answer 1

考虑条件聚合，您有条件地分配新列，然后按需要的分组进行聚合。 使用calculated子句完成所需的最终余额算法。

TITLE "Balance Historico de la Wallet Empresarial"; 

PROC SQL; 
   SELECT transaction_id
        , initial_balance FORMAT=DOLLAR32.2
        , SUM(deposit) AS deposit FORMAT=DOLLAR32.2
        , SUM(withdrawal) AS withdrawal FORMAT=DOLLAR32.2
        , initial_balance + 
          calculated deposit - 
          calculated withdrawal AS final_balance FORMAT=DOLLAR32.2
  FROM 
   (SELECT ts.transaction_id
         , 100000 AS initial_balance
         , CASE WHEN tt.description = 'Deposit' THEN ts.amount ELSE NULL END AS deposit
         , CASE WHEN tt.description = 'Withdrawal' THEN ts.amount ELSE NULL END AS withdrawal
         , CASE WHEN tt.description = 'Inner_balance' THEN ts.amount ELSE NULL END AS inner_balance
    FROM _LIB.TRANSACTIONS ts
    INNER JOIN _LIB.TRANSACTION_TYPES tt
       ON ts.transaction_type = tt.id
   ) sub
  GROUP BY transaction_id
         , initial_balance;
QUIT; 

或者，使用 SAS SQL 方言，将IFN用于稍微短一些的语法：

  ...
  , IFN(tt.description = 'Deposit', ts.amount, .) AS deposit
  , IFN(tt.description = 'Withdrawal', ts.amount, .) AS withdrawal
  , IFN(tt.description = 'Inner_balance', ts.amount, .) AS inner_balance
  ...