mysql - 如何通过用户登录选择*订单？

Question

[问]请帮忙，比如有一个数据

tbl_user
| Id | name |
| 1 | Bayu |
| 2 | Indra |
| 3 | Rangga |

tbl_data
| Id | userId | items |
| 1 | 1 | Knife |
| 2 | 3 | CD |
| 3 | 1 | Rose |
| 4 | 3 | HP |
| 5 | 2 | Honey |
| 6 | 1 | cups |
| 7 | 1 | Yarn |
| 8 | 2 | Shoes |

我想按项目排序表数据仅记录用户访问例如，当用户Bayu登录时，数据的排序结果是顶部本身并且数据的持久化

userId | items |
1 | Yarn |
1 | cups |
1 | Knife |
1 | Rose |
2 | Honey |
2 | Shoes |
3 | CD |
3 | HP |

当Indra登录时排序的结果:

userId | items |
2 | Honey |
2 | Shoes |
1 | Yarn |
1 | cups |
1 | Knife |
1 | Rose |
3 | CD |
3 | HP |

或者当 Rangga 登录时

userId | items |
3 | CD |
3 | HP |
1 | Yarn |
1 | cups |
1 | Knife |
1 | Rose |
2 | Honey |
2 | Shoes |

如何查询(MySQL)选择它？

Answer 1

试试这个:

 select userId, items 
 from tbl_data 
 order by userId=:userId desc, userId asc;

例如，如果 Indra 登录:

 select userId, items 
 from tbl_data 
 order by userId=2 desc, userId asc;