homework-jianmu/tests/army/query/function/ans/stddev.csv

1	taos> select STDDEV(current) from ts_4893.meters
2	stddev(current) |
3	============================
4	1.154339668872967 |
5	taos> select STDDEV(current) from ts_4893.meters interval(1d) order by 1 limit 10
6	stddev(current) |
7	============================
8	0.838273408289689 |
9	0.838639277789961 |
10	0.839707477142884 |
11	0.839707477142884 |
12	0.840565842326814 |
13	0.844574982206356 |
14	0.846680761198646 |
15	0.847012832740024 |
16	0.847182714923872 |
17	0.848223610563545 |
18	taos> select STDDEV(id) from ts_4893.meters
19	stddev(id) |
20	============================
21	2886.751331514371941 |
22	taos> select STDDEV(id) from ts_4893.meters interval(1d) limit 10
23	stddev(id) |
24	============================
25	4.609772228646444 |
26	8.366600265340756 |
27	8.366600265340756 |
28	8.366600265340756 |
29	8.366600265340756 |
30	8.077747210701755 |
31	8.366600265340756 |
32	8.366600265340756 |
33	8.366600265340756 |
34	8.366600265340756 |
35	taos> select STDDEV(id) from ts_4893.meters where id > 100
36	stddev(id) |
37	============================
38	2857.595142773027419 |
39	taos> select STDDEV(id) from ts_4893.meters interval(1d) order by 1 limit 10
40	stddev(id) |
41	============================
42	4.609772228646444 |
43	5.477225575051661 |
44	8.077747210701755 |
45	8.077747210701755 |
46	8.077747210701755 |
47	8.077747210701755 |
48	8.077747210701755 |
49	8.077747210701755 |
50	8.077747210701755 |
51	8.077747210701755 |
52	taos> select stddev_pop(null) from ts_4893.meters
53	stddev_pop(null) |
54	============================
55	NULL |
56	taos> select stddev_pop(id) from ts_4893.d0
57	stddev_pop(id) |
58	============================
59	2886.751331514371941 |
60	taos> select stddev_pop(id) from ts_4893.meters
61	stddev_pop(id) |
62	============================
63	2886.751331514371941 |
64	taos> select stddev_pop(current) from ts_4893.d0
65	stddev_pop(current) |
66	============================
67	1.154339668872967 |
68	taos> select stddev_pop(current) from ts_4893.meters
69	stddev_pop(current) |
70	============================
71	1.154339668872967 |
72	taos> select stddev_pop(voltage) from ts_4893.meters
73	stddev_pop(voltage) |
74	============================
75	2.876459705957324 |
76	taos> select stddev_pop(voltage) from ts_4893.meters where voltage is not null
77	stddev_pop(voltage) |
78	============================
79	2.876459705957324 |
80	taos> select stddev_pop(phase) from ts_4893.meters
81	stddev_pop(phase) |
82	============================
83	0.288595458155823 |
84	taos> select stddev_pop(phase) from ts_4893.meters where ts between '2023-01-01 00:00:00' and '2023-12-31 23:59:59'
85	stddev_pop(phase) |
86	============================
87	0.288075357974611 |
88	taos> select stddev_pop(total_voltage) from (select sum(voltage) as total_voltage from ts_4893.meters group by location)
89	stddev_pop(total_voltage) |
90	============================
91	0.000000000000000 |
92	================================
93	1.150000000000000e+00 |
94	==============================
95	1.332500071133751e+00 |
96	taos> select log(stddev_pop(voltage) + 1) from ts_4893.meters
97	log(stddev_pop(voltage) + 1) |
98	===============================
99	1.354922290183882e+00 |
100	groupid | stddev_pop(voltage) |
101	======================================
102	1 | 2.876459705957324 |
103	location | stddev_pop(current) |
104	=================================================
105	beijing | 1.154339668872967 |
106	location | stddev_pop(voltage) |
107	=================================================
108	beijing | 2.876459705957324 |