user_name
es 编写查询DSL,查询user_name字段不为空的文档
内容来自对 chatgpt 的咨询 我们可以使用exists查询来检查user_name字段是否存在且包含非空值: { "query": { "bool": { "must": { "exists": { "field": "user_name" } } } } } 这个查询将会返回所有包含user ......
mysql报错 1140 - In aggregated query without GROUP BY, expression #1 of SELECT list contains nonaggregated column 'a.user_name'; this is incompatible with sql_mode=only_full_group_by
表结构如下: CREATE TABLE `user` ( `id` bigint NOT NULL, `user_name` varchar(255) DEFAULT NULL, `password` varchar(255) DEFAULT NULL, `create_time` datetime ......