Programming, Alibaba Cloud, Database, Postgresql, Data Analytics.
"*SELECT* 1" (cost=0.57..0.63 rows=1 width=37) (actual time=0.029..0.029 rows=1 loops=1) Output: "*SELECT* 1".sensor_stat Buffers: shared hit=5 -> Limit (cost=0.57..0.62 rows=1 width=49) (actual time=0.028..0.028 rows=1 loops=1) Output: sensor_stat.*, sensor_stat.sid, sensor_stat.crt_time Buffers: