DROP DATABASE IF EXISTS mcs284_db;
CREATE DATABASE mcs284_db;
USE mcs284_db;
CREATE TABLE t1
(
t1_DATE DATE,
t1_TIME TIME,
t1_DATETIME DATETIME
)ENGINE=Columnstore;
INSERT INTO t1 VALUES('1991-05-30', '01:00:50', '2020-12-11 06:08:59');
INSERT INTO t1 VALUES('2991-10-13', '21:19:52', '1987-01-01 17:28:37');
SELECT HOUR('2020-02-21') FROM t1 LIMIT 1;
HOUR('2020-02-21')
0
Warnings:
Warning	1292	Truncated incorrect time value: '2020-02-21'
SELECT HOUR('11:12:13') FROM t1 LIMIT 1;
HOUR('11:12:13')
11
SELECT HOUR('2020/02/11 13:12:13') FROM t1 LIMIT 1;
HOUR('2020/02/11 13:12:13')
13
SELECT t1_DATE, HOUR(t1_DATE) FROM t1 ORDER BY 1;
t1_DATE	HOUR(t1_DATE)
1991-05-30	0
2991-10-13	0
SELECT t1_DATETIME, HOUR(t1_DATETIME) FROM t1 ORDER BY 1;
t1_DATETIME	HOUR(t1_DATETIME)
1987-01-01 17:28:37	17
2020-12-11 06:08:59	6
SELECT t1_TIME, HOUR(t1_TIME) FROM t1 ORDER BY 1;
t1_TIME	HOUR(t1_TIME)
01:00:50	1
21:19:52	21
DROP DATABASE mcs284_db;