1 指定数据排前面
。。。
GROUP BY
nutr_scheme.id
ORDER BY
nutr_scheme.id NOT IN (SELECT scheme_id FROM nutr_user_default_scheme where user_id = 10036 AND is_delete = 0),
drink_count DESC,
nutr_scheme.id ASC
2 多行查询结果合并一行(适用于一对多)
SELECT
GROUP_CONCAT(NAME) AS ALL_NAME,
`name`
FROM
base_basedata
GROUP BY
pid
3 DISTINCT用于去掉count重复值
COUNT(DISTINCT id) AS `count`
4 查询两分钟以内数据
create_time >= UNIX_TIMESTAMP(now()-interval 120 second)
5 时间戳(10位)转时间
FROM_UNIXTIME(time_stamp, ‘%Y-%m-%d %H:%i:%S‘)
