Question

示例：SELECT title，ROW_NUM FROM article ORDER BY count_read。 ROW_NUM应该被替换为什么？

我不喜欢在得到结果后按程序生成索引，因为我想通过查询上面的示例DQL将结果数据插入表Rank中。

我想要实现的目标可能是：

"INSERT INTO RANK r (title, index, lastIndex)
SELECT title,ROW_NUM,(SELECT index FROM RANK WHERE id = :id - 1) FROM article ORDER BY count_read"

提前致谢..

Answer 1

我认为您可能会使用变量，如下所示：

"
SET @row_num := 1;
INSERT INTO RANK r (title, index, lastIndex)
SELECT title, 
       (@row_num := @row_num + 1),
       (SELECT index FROM RANK WHERE id = :id - 1) 
FROM article ORDER BY count_read
"

如何获取使用DQL（Doctrine）查询的结果行数

1 个答案: