TDengine/test/cases/11-Functions/resource/ans/stddev.csv

1	taos> select STDDEV(current) from ts_4893.meters
2	stddev(current) |
3	============================
4	1.15433966739033 |
5	taos> select STDDEV(current) from ts_4893.meters interval(1d) order by 1 limit 10
6	stddev(current) |
7	============================
8	0.838273445081508 |
9	0.838639486002895 |
10	0.839707318893023 |
11	0.839707318893023 |
12	0.840565863329237 |
13	0.84457509570056 |
14	0.846680829076275 |
15	0.847012514139425 |
16	0.847182802733551 |
17	0.848223444072482 |
18	taos> select STDDEV(id) from ts_4893.meters
19	stddev(id) |
20	============================
21	2886.75133151437 |
22	taos> select STDDEV(id) from ts_4893.meters interval(1d) limit 10
23	stddev(id) |
24	============================
25	4.60977222864644 |
26	8.36660026534076 |
27	8.36660026534076 |
28	8.36660026534076 |
29	8.36660026534076 |
30	8.07774721070176 |
31	8.36660026534076 |
32	8.36660026534076 |
33	8.36660026534076 |
34	8.36660026534076 |
35	taos> select STDDEV(id) from ts_4893.meters where id > 100
36	stddev(id) |
37	============================
38	2857.59514277302 |
39	taos> select STDDEV(id) from ts_4893.meters interval(1d) order by 1 limit 10
40	stddev(id) |
41	============================
42	4.60977222864644 |
43	5.47722557505166 |
44	8.07774721070176 |
45	8.07774721070176 |
46	8.07774721070176 |
47	8.07774721070176 |
48	8.07774721070176 |
49	8.07774721070176 |
50	8.07774721070176 |
51	8.07774721070176 |
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	2886.75133151437 |
60	taos> select stddev_pop(id) from ts_4893.meters
61	stddev_pop(id) |
62	============================
63	2886.75133151437 |
64	taos> select stddev_pop(current) from ts_4893.d0
65	stddev_pop(current) |
66	============================
67	1.15433966739033 |
68	taos> select stddev_pop(current) from ts_4893.meters
69	stddev_pop(current) |
70	============================
71	1.15433966739033 |
72	taos> select stddev_pop(voltage) from ts_4893.meters
73	stddev_pop(voltage) |
74	============================
75	2.876459705958 |
76	taos> select stddev_pop(voltage) from ts_4893.meters where voltage is not null
77	stddev_pop(voltage) |
78	============================
79	2.876459705958 |
80	taos> select stddev_pop(phase) from ts_4893.meters
81	stddev_pop(phase) |
82	============================
83	0.288595458095627 |
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	0.288075357963905 |
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 |
92	================================
93	1.15 |
94	==============================
95	1.33250006771083 |
96	taos> select log(stddev_pop(voltage) + 1) from ts_4893.meters
97	log(stddev_pop(voltage) + 1) |
98	===============================
99	1.35492229018406 |
100	groupid | stddev_pop(voltage) |
101	======================================
102	1 | 2.876459705958 |
103	location | stddev_pop(current) |
104	=================================================
105	beijing | 1.15433966739033 |
106	location | stddev_pop(voltage) |
107	=================================================
108	beijing | 2.876459705958 |