dragon4808 2015-08-27 10:44
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MySQL:选择最后N行,而SUM less则编号

I've got a huge table:

+------+---------+-----+-----+-------+------+---------+
|ticker|data_date|price|count|oper_id|ext_nr|oper_summ|
+------+---------+-----+-----+-------+------+---------+
|SBER  |2015-08..|70.00|15   |0      |251528|1050.00  |
|AFLT  |2015-08..|30.00|5    |0      |251525|150.00   |
|SBER  |2015-08..|69.00|10   |1      |251521|690.00   |
|SBER  |2015-08..|71.00|15   |1      |251513|1065.00  |
|SBER  |2015-08..|72.00|15   |0      |251512|1080.00  |

  data_date format: 2015-01-05 09:59:59
  UNIQUE KEY `idx_ticker_ext_nr` (`ticker`,`ext_nr`)

I need to SELECT LAST N rows WHERE SUM(oper_summ) will be LESS THEN 10000

I've found similar topic: limiting the rows to where the sum a column equals a certain value in MySQL

SELECT
  O.ext_nr,
  O.price,   O.count,
  O.oper_summ,
  (SELECT
     sum(oper_summ) FROM Table1
   WHERE ext_nr <= O.ext_nr) 'RunningTotal'
FROM Table1 O
HAVING RunningTotal <= 10000

but unable to make it work in my coditions...

Found a solution:

SET @msum := 0;
select t1.* from 
(select m.*, 
(@msum := @msum + m.oper_summ) as cumul_oper_summ from jos_fintools_data m order by m.data_date DESC ) 
t1 where t1.cumul_oper_summ <= 10000;

credits goes to toomanyredirects: limiting the rows to where the sum a column equals a certain value in MySQL

  • 写回答

2条回答 默认 最新

  • douhui5953 2015-08-27 12:01
    关注
    SET @msum := 0;
    select t1.* from 
    (select m.*, 
    (@msum := @msum + m.oper_summ) as cumul_oper_summ from jos_fintools_data m order by m.data_date DESC ) 
    t1 where t1.cumul_oper_summ <= 10000;
    
    本回答被题主选为最佳回答 , 对您是否有帮助呢?
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