oracle中extract()函数从oracle 9i中引入,用于从一个date或者interval类型中截取到特定的部分 语法如下: extract ( {year|month|day|hour|minute|second }|{ timezone_hour|timezone_minute }|{ timezone_region|timezone_abbr }from{ date_value|interval_value } ) 只可以从一个date类型中截取年月日 SQL>se...
SQL> select extract(month from sysdate) as "month" from dual 2 / month --- 8 3. 获取当前日期中的日 SQL> select extract(day from date'2012-12-28') as "day" from dual 2 / day --- 28 分类: Oracle 0 0 « 上一篇: VI 编辑器保存命令 » 下一篇: Oracle 身份验证方式 pos...
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。
EXTRACT(): return a year, month, day, hour, minute, second, or time zone from x : EXTRACT « Date Timezone « Oracle PL / SQLOracle PL / SQL Date Timezone EXTRACT EXTRACT(): return a year, month, day, hour, minute, second, or time zone from x...
SELECT EXTRACT(MONTH FROM '2022-01-01 15:12:35');produces the following result: 1Example 3The SQL statement, SELECT EXTRACT(HOUR, '2022-01-01 15:12:35');produces the following result: 15List of SQL Date FunctionsFunction NameDescription DATEADD Adds an interval to a date value in SQL ...
Oracle 12c, Oracle 11g, Oracle 10g, Oracle 9i Example Let's look at some Oracle EXTRACT function examples and explore how to use the EXTRACT function in Oracle/PLSQL. For example: EXTRACT(YEAR FROM DATE '2003-08-22')Result:2003 EXTRACT(MONTH FROM DATE '2003-08-22')Result:8 EXTRACT(DAY...
Extract date, time from a given datetime in Oracle The EXTRACT() function is used to extract the value of a specified datetime field from a datetime or interval expression. Uses of Oracle EXTRACT (datetime) Function: Extracting Year, Month, or Day from a Date:Retrieve the year, month, or...
Extract can only get single fields. To extract the full date (year, month, day) or time (hour, minute, second) from a timestamp, cast can be used:1 CAST( AS [DATE|TIME]) This is particularly useful for the group by clause. In the where clause, it is often the wrong choice....
Note that theEXTRACT()function will returnUNKNOWNif the combination of field and source result in ambiguity. Return value TheEXTRACT()function returns the value of the field of the source. Examples A) Extracting fields from DATE values You can extract YEAR, MONTH, and DAY from a DATE value ...
Select * from ( SELECT extract(month from order_date) month, order_mode, order_total from oe.orders where EXTRACT(YEAR FROM order_date) = 2000 ) PIVOT (SUM(order_total) for order_mode in ('direct' as store, 'online' as internet)) ...