ORACLE中当前时间大于等于from时间和当前时间小于等于时间的条件

Question

由于使用 TO_CHAR()，条件不工作，但如何提取时间？以下是我的查询：

SELECT *
  FROM SUPPLY_TIMING
 WHERE TO_CHAR (SYSDATE, 'HH:Mi') >= TO_CHAR (FROM_TIME, 'HH:Mi')
       AND TO_CHAR (SYSDATE, 'HH:Mi') <= TO_CHAR (TO_TIME, 'HH:Mi')

Answer 1

看来您只对时间感兴趣，对日期部分不感兴趣。假设 FROM_TIME 和 TO_TIME 的数据类型是 DATE 或 TIMESTAMP 你可以这样做：

select *
FROM SUPPLY_TIMING
WHERE EXTRACT(HOUR FROM SYSDATE) + EXTRACT(MINUTE FROM SYSDATE)/60 
   BETWEEN EXTRACT(HOUR FROM FROM_TIME) + EXTRACT(MINUTE FROM FROM_TIME)/60
       AND EXTRACT(HOUR FROM TO_TIME) + EXTRACT(MINUTE FROM TO_TIME)/60

Answer 2

乍一看，我猜是您的格式掩码导致了问题。 HH 组件将为您提供十二小时格式的小时数，因此下午 1 点将返回为 01，我想如果您使用 HH24 代替，您会得到 13，使字符串比较按预期工作：

SELECT *
FROM SUPPLY_TIMING
WHERE TO_CHAR (SYSDATE, 'HH24:Mi') >= TO_CHAR (FROM_TIME, 'HH24:Mi')
AND TO_CHAR (SYSDATE, 'HH24:Mi') <= TO_CHAR (TO_TIME, 'HH24:Mi')

ORACLE中当前时间大于等于from时间和当前时间小于等于时间的条件

Condition for current time greater than or equal to from time and current time less than or equal to time in ORACLE

sql

oracle

date-arithmetic

oracle11g