1、apache druid sql 查询中文时，需进行转码：

其中 中文：签约

SELECT customer_type FROM useroperation WHERE customer_type in (U&'\7b7e\7ea6') group by customer_type

tomer_type

2、apache druid 中 关键词转义 interval 在 druid 中是关键词，查询时需进行转义

SELECT "interval" FROM uservalid where "interval"='daily' group by "interval"