CodeIgniter 3 - 非聚合列分组依据

Question

当我尝试在 CodeIgniter 3 中运行此查询时，出现以下错误：

Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'forum.phrases.id' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by

SELECT `id`, `keyword`, `value`, `language` FROM `phrases` GROUP BY `language`

PHP：

$query = $this->db->select("id, keyword, value, language")
            ->group_by("language")
            ->get("phrases")
            ->result();

我用谷歌搜索了一下，但不太明白答案，主要是因为查询与 CI 无关，而且非常复杂......如何在 codeigniter 中解决这个问题？

我不想更改任何 MySQL 设置。

Answer 1

表达式#1

SELECT list is not in GROUP BY clause and contains nonaggregated column 'spd.quantity' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by

只需在查询的上方添加以下行即可。

$this->db->query("SET sql_mode=(SELECT REPLACE(@@sql_mode, 'ONLY_FULL_GROUP_BY', ''));");