mysql time查询

-- 查询所有事件及其发生时间
SELECT event_name, event_time FROM events;

-- 查询在特定时间段内发生的事件
SELECT event_name, event_time FROM events WHERE event_time BETWEEN '09:00:00' AND '17:00:00';

-- 计算两个时间点之间的时间差
SELECT TIMESTAMPDIFF(SECOND, '08:00:00', '12:30:00') AS time_difference;

-- 确保时间格式正确
SELECT event_name, event_time FROM events WHERE event_time BETWEEN '09:00:00' AND '17:00:00';

-- 使用函数处理边界条件
SELECT event_name, event_time FROM events WHERE TIME(event_time) >= '09:00:00' AND TIME(event_time) <= '17:00:00';

-- 使用TIMESTAMPDIFF函数计算时间差
SELECT TIMESTAMPDIFF(SECOND, '08:00:00', '12:30:00') AS time_difference;