标签:sysdate BETWEEN months SQL MONTHS 日期 dual between select
原文链接:http://www.cnblogs.com/oradragon/archive/2012/08/31/2665822.htmlSyntax
Purpose
MONTHS_BETWEEN
returns number of months between dates date1
and date2
. The month and the last day of the month are defined by the parameter NLS_CALENDAR
. If date1
is later than date2
, then the result is positive. If date1
is earlier than date2
, then the result is negative. If date1
and date2
are either the same days of the month or both last days of months, then the result is always an integer. Otherwise Oracle Database calculates the fractional portion of the result based on a 31-day month and considers the difference in time components date1
and date2
.
SQL> select months_between(add_months(sysdate, 5), sysdate) as "months" from dual 2 / months ---------- 5 SQL> select months_between(sysdate, add_months(sysdate, 9)) as "months" from dual 2 / months ---------- -9
SQL> select months_between(sysdate+20, sysdate) as "months" from dual 2 / months ---------- .64516129 SQL> select months_between(sysdate, sysdate+31) as "months" from dual 2 / months ---------- -1.0322581 SQL> select months_between(sysdate+30, sysdate) as "months" from dual 2 / months ---------- 1
转载于:https://www.cnblogs.com/oradragon/archive/2012/08/31/2665822.html
标签:sysdate,BETWEEN,months,SQL,MONTHS,日期,dual,between,select 来源: https://blog.csdn.net/weixin_30315723/article/details/95951570
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