Warning: count(): Parameter must be an array or an object that implements Countable in /var/www/vhosts/shan.info/httpdocs/components/com_k2/models/item.php on line 1198

Warning: count(): Parameter must be an array or an object that implements Countable in /var/www/vhosts/shan.info/httpdocs/components/com_k2/models/item.php on line 763

mysql TO_DAYS(date) 函数

TO_DAYS(date)

给定一个日期date, 返回一个天数 (从年份0开始的天数 )。

mysql> SELECT TO_DAYS(950501);

-> 728779

mysql> SELECT TO_DAYS(‘1997-10-07′);

-> 729669

TO_DAYS() 不用于阳历出现(1582)前的值,原因是当日历改变时,遗失的日期不会被考虑在内。

请记住, MySQL“日期和时间类型”中的规则将日期中的二位数年份值转化为四位。例如,  ‘1997-10-07′和 ‘97-10-07′ 被视为同样的日期:

mysql> SELECT TO_DAYS(‘1997-10-07′), TO_DAYS(‘97-10-07′);

-> 729669, 729669

对于1582 年之前的日期(或许在其它地区为下一年 ), 该函数的结果实不可靠的。

Last modified onSunday, 14 October 2012 04:07

Warning: count(): Parameter must be an array or an object that implements Countable in /var/www/vhosts/shan.info/httpdocs/templates/gk_publisher/html/com_k2/templates/default/item.php on line 169
  • Published in MYSQL
  • Read 3600 times

Notice: Only variables should be assigned by reference in /var/www/vhosts/shan.info/httpdocs/templates/gk_publisher/html/com_k2/templates/default/item.php on line 478
back to top