| payments | | transactions | | transaction_items |
|:--------------:| |:------------:| |:-----------------:|
| id | | id | | id |
| date | | number | | transaction_id |
| amount | | date | | description |
| transaction_id | | val | | price |
| discount |
| quantity |
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我正在尝试显示交易付款列表,并在每次付款后显示当前余额。以下是预期结果的示例
| number | DATE(p.date) | total | paid | balance |
| 1355 | 2016-10-31 | 899.00 | 450.00 | 449.00 |
| 1355 | …
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