两个表
1、新闻栏目表db_Column
|
Id |
ParId |
ColumnName |
|
1 |
0 |
终极父栏目1 |
|
2 |
0 |
终极父栏目2 |
| 3 |
1 |
二级栏目1 |
|
4 |
1 |
二级栏目2 |
|
5 |
2 |
二级栏目3 |
2、新闻表db_News
|
Id |
ColumnId |
IsCheck |
....... |
....... |
|
1 |
3 |
1 |
||
|
2 |
3 |
1 |
||
|
3 |
4 |
0 |
||
|
4 |
4 |
1 |
||
|
5 |
4 |
1 | ||
|
6 |
5 |
1 |
参数为终极父栏目的Id,查询出新闻表中该终极父栏目下的，每个二级子栏目下的，第一篇IsCheck=1的新闻，要求查出新闻所有字段和对应栏目名称
SELECT n.*, c.ColumnName
FROM (db_News n INNER JOIN db_Column c ON n.ColumnId = c.Id)
WHERE (n.Id IN
(SELECT MIN(Id) FROM
(SELECT Id, ColumnId FROM db_News WHERE (IsCheck= 1) ) GROUP BY ColumnId))
AND
(n.ColumnId IN (SELECT Id FROM db_Column WHERE (ParId =参数)))
时间： 2024-08-10 01:58:48