在SQL中使用Oracle的TRUNC函数可以将日期或数字值截断到指定的精度级别。这在很多情况下非常有用,比如在需要比较日期或数字值时,可以通过截断到相同的精度级别来确保比较的准确性。另外,TRUNC函数还可以用于对日期进行舍入,或者将日期值转换为特定的格式。 总的来说,Oracle的TRUNC函数可以帮助我们更方便地处理日期和数字...
In Oracle/PLSQL, the trunc function returns a date truncated to a specific unit of measure. The syntax for the trunc function is: trunc ( date, [ format ] ) date is the date to truncate. format is the unit of measure to apply for truncating. If the format parameter is omitted, the ...
【Oracle SQL】months_between与trunc函数 months_between(date1,date2):返回两个日期之间的月份数量 trunc(num,[decimal]):对num进行截取(注:截取不做四舍五入),可选参数[decimal]设定保留的小数位数,若该参数为负,意为从小数点左边开始截取
E Oracle SQL Reserved Words and Keywords F Extended Examples IndexTRUNC (number) Syntax trunc_number::= Description of the illustration trunc_number.eps Purpose The TRUNC (number) function returns n1 truncated to n2 decimal places. If n2 is omitted, then n1 is truncated to 0 places. n2...
In Oracle/PLSQL, the trunc function returns a date truncated to a specific unit of measure. The syntax for the trunc function is: trunc ( date, [ format ] ) date is the date to truncate. format is t ...
日期函数截取之后,还是日期函数,不会更改格式。 下面结果中的下三角箭头就代表可以返回日期格式。 2.To_Char 函数,将所有格式都转换为字符串格式。 SELECT TO_CHAR(SYSDATE,'YYYY-MM-DD HH:MI:SS') FROM DUAL; SELECT TO_CHAR(SYSDATE,'YYYY-MM-DD HH24:MI:SS') FROM DUAL; --- 如果不加24,就默认是...
Oracle 9i, Oracle 10g, Oracle 11g 例如: You could use the decode function in an SQL statement as follows: select supplier_name,decode(supplier_id,1000,'IBM',10001,'Microsoft','1002','Hewlett Packard','Gateway') result from suppliers; ...
来自专栏 · 数据分析python/sql/excel 2 人赞同了该文章 ---trunc日期操作--- select to_char(sysdate, 'yyyy-mm-dd hh24:mi:ss') ,to_char(trunc(sysdate), 'yyyy-mm-dd hh24:mi:ss') from dual;--sysdate和trunc(sysdate)是不一样的 sysdate在当天的零时零分零秒等于trunc(sysdate) select ...
应用于Oracle 9i, Oracle 10g, Oracle 11g。 例如: 复制 You could use the decode function in an SQL statement as follows:select supplier_name,decode(supplier_id,1000,'IBM',10001,'Microsoft','1002','Hewlett Packard','Gateway') result from suppliers; ...
Oracle 12c, Oracle 11g, Oracle 10g, Oracle 9i, Oracle 8i Example for dates Let’s consider some examples of theTRUNCfunction and learn how to use the TRUNC function inOracle/PLSQL. SELECT TRUNC(TO_DATE('31.08.2014'), 'YEAR') FROM DUAL; ...