mysql group by order by issue

Question

我的问题是：

我有这样的数据库：

| from |  to  | time |   text   | read |
| hans | poul | 0916 | hi there |   1  |
| john | poul | 1033 | waz up   |   1  |
| hans | john | 1145 | new text |   0  |
| poul | john | 1219 | message  |   0  |
| poul | hans | 1233 | respond  |   0  |

我想要一个输出，其中每个“from”或“to”都有“hans”列出，分组并按时间顺序排列：

poul - 1233 - respond  - 0
john - 1145 - new text - 0

Answer 1

您的SQL查询可能是： -

select * from `table_name` where (`from` ='hans' or `to` ='hans') group by `from`, `to` order by time desc

如果您发现任何困难，请回复。