ORACLE——Query related data based on time conditions

Summary:

How to query related data by using the time field as a condition in Oracle.

universal:

The to_char() function that comes with oracle is used

1. Less than a certain time (accurate to hours, minutes and seconds):

SELECT
	*
FROM
	OP_BS_CC
WHERE
	TRANS_TIME < TO_DATE (
		'2018-04-23 10:39:00',
		'yyyy-mm-dd hh24:mi:ss'
	);

1.1. Then if the event is greater than a certain event, you only need to change the less-than sign to a greater-than sign.

1.2. If the pointer is accurate to the year, month and day, then the content of to_char() becomes ('2018-04-23','yyyy-mm-dd')

2. During a certain period of time

In this case, the between...and keyword is used more.

SELECT
	*
FROM
	OP_BS_CC
WHERE
	TRANS_TIME 
		BETWEEN 
			"TO_DATE"(
				'2018-04-23 10:38:00', 
				'yyyy-mm-dd hh24:mi:ss')
		AND
			"TO_DATE" (
				'2018-04-23 10:40:00',
				'yyyy-mm-dd hh24:mi:ss'
			);

But of course you can also use the > and < signs.

SELECT
	*
FROM
	OP_BS_CC
WHERE
	TRANS_TIME > "TO_DATE"
		('2018-04-23 10:38:00',
		'yyyy-mm-dd hh24:mi:ss')
AND
	TRANS_TIME < TO_DATE (
		'2018-04-23 10:40:00',
		'yyyy-mm-dd hh24:mi:ss'
	);