DROP DATABASE IF EXISTS mcs278_db;
CREATE DATABASE mcs278_db;
USE mcs278_db;
CREATE TABLE t1
(
t1_DATE DATE,
t1_TIMESTAMP TIMESTAMP,
t1_DATETIME DATETIME
)ENGINE=Columnstore;
INSERT INTO t1 VALUES('1991-05-30', '1999-10-28 01:00:50', '2020-12-11 01:08:59');
INSERT INTO t1 VALUES('2991-10-13', '1972-11-22 11:19:52', '2002-02-21 05:28:37');
SELECT WEEKDAY('2020-10-12') FROM t1 LIMIT 1;
WEEKDAY('2020-10-12')
0
SELECT WEEKDAY('2020-10-13 12:13:14') FROM t1 LIMIT 1;
WEEKDAY('2020-10-13 12:13:14')
1
SELECT WEEKDAY('12:13:14') FROM t1 LIMIT 1;
WEEKDAY('12:13:14')
NULL
Warnings:
Warning	1292	Incorrect datetime value: '12:13:14'
SELECT t1_DATE, WEEKDAY(t1_DATE) FROM t1 ORDER BY 1;
t1_DATE	WEEKDAY(t1_DATE)
1991-05-30	3
2991-10-13	3
SELECT t1_DATETIME, WEEKDAY(t1_DATETIME) FROM t1 ORDER BY 1;
t1_DATETIME	WEEKDAY(t1_DATETIME)
2002-02-21 05:28:37	3
2020-12-11 01:08:59	4
SELECT t1_TIMESTAMP, WEEKDAY(t1_TIMESTAMP) FROM t1 ORDER BY 1;
t1_TIMESTAMP	WEEKDAY(t1_TIMESTAMP)
1972-11-22 11:19:52	2
1999-10-28 01:00:50	3
DROP DATABASE mcs278_db;