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'
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...
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 ...
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。
SQL> select extract(year from sysdate) as "year" from dual 2 / year --- 2012 2. 获取当前日期中的月份 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 ...
EXTRACT(): return a year, month, day, hour, minute, second, or time zone from x : EXTRACT « Date Timezone « Oracle PL / SQL
Hello, Let's say my application must support multiple sql database providers and I have a table with stored timestamps and I would like to create reports with information grouped by day/month/year, in an SQL dialect-independent fashion. ...
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>>-EXTRACT--(--+-YEAR--+--FROM--+-date-expression---+--)--->< +-MONTH-+ '-timestamp-expression-' '-DAY---' Extract time values >>-EXTRACT--(--+-HOUR---+--FROM--+-time-expression---+--)--->< +-MINUTE-+ '-timestamp-expression-' '-SECOND-' The schema ...
ExampleGet your own SQL ServerExtract the month from a date:SELECT EXTRACT(MONTH FROM "2017-06-15"); Try it Yourself » Definition and UsageThe EXTRACT() function extracts a part from a given date.SyntaxEXTRACT(part FROM date)Parameter ValuesParameterDescription part Required. The part to ...