1、单字段去重 select distinct aly_layer from t_aly_il_result
2、多字段去重 select distinct aly_layer,CREATE_TIME from t_aly_il_result
3、对去重字段进行统计 select count(distinct aly_layer) from t_aly_il_result
2023-12-22 11:57:57
1、单字段去重 select distinct aly_layer from t_aly_il_result
2、多字段去重 select distinct aly_layer,CREATE_TIME from t_aly_il_result
3、对去重字段进行统计 select count(distinct aly_layer) from t_aly_il_result