It would depend on the field type, for instance, if if it is a date/datetime you can use the function: MONTH(date) Explained better here: https://learnsql.com/cookbook/how-to-get-the-month-from-a-date-in-mysql/#
month 如果source为timestamp,表示一年里的月份数(1-12)。 SELECTEXTRACT(monthFROMTIMESTAMP'2001-02-16 20:38:40'); date_part---2(1row) 如果source为interval,表示月的数目,然后对12取模(0-11)。 SELECTEXTRACT(monthFROMinterval'2 years 13 months'); date_part---1(1row) quarter 该天所在的该...
datetimeDATE、TIMESTAMP、TIMESTAMP WITH TIME ZONE、TIMESTAMP WITH LOCAL TIME ZONE、INTERVAL YEAR TO MONTH、INTERVAL DAY TO SECOND等数据类型的值。 说明 如果指定提取YEAR或MONTH,则datetime数据类型为DATE、TIMESTAMP、TIMESTAMP WITH TIME ZONE、TIMESTAMP WITH LOCAL TIME ZONE或INTERVAL YEAR TO MONTH。
显示当月之前所有结果的SQL查询 、 我在Oracle中有一个包含列的表: DATEID date,COUNT_OF_PHOTOS int这个表基本上表示每天上传的照片数量。我有一个汇总每月上传的照片数量的查询:fromp 浏览1提问于2012-07-19得票数0 2回答 子查询是否基于其他条件的“短路”?
SQL>SELECT hiredate,2to_number(to_char(hiredate,'hh24'))时,3to_number(to_char(hiredate,'mi'))分,4to_number(to_char(hiredate,'ss'))秒,5to_number(to_char(hiredate,'dd'))日,6to_number(to_char(hiredate,'mm'))月,7to_number(to_char(hiredate,'yyyy'))年,8to_number(to_char...
extract(month from 后边应该直接跟日期格式就可以，你的t.TASK_STARTDATE字段类型不是date？？？改成：extract(month fromt.TASK_STARTDATE)= '12'
SQL>selectextract(yearfromsysdate)as"year"fromdual 2 / year --- 2012 2. 获取当前日期中的月份 SQL>selectextract(monthfromsysdate)as"month"fromdual 2 / month --- 8 3. 获取当前日期中的日 SQL>selectextract(dayfromdate'2012-12-28')as"day"fromdual 2 / day --- 28...
EXTRACT( fmt , from , date ) 语法:在date时间中获取fmt格式类型的时间。 select extract(year from sysdate) year from dual; select extract(month from sysdate) month from dual; select extract(day from systimestamp) day from dual; select extract(hour from systimestamp) hour from dual; ...
EXTRACT (component_part FROM expression)where the data type of <expression> is some type of date, time, or datetime. <number> is an integer (can be positive or negative). Common <component_datepart> can be one of the following: YEAR MONTH DAY HOUR MINUTE SECOND...
In Java 8, a whole new date and time library was introduced for anumber of good reasons. Besides other advantages,the new library provides a better API for operations, such as extractingYear,Month,Dayetc. from a givenDate. For a more detailed article on the new date-time library, have ...