create or replace function getdate(sp_date varchar) return date is Result date; begin if LENGTH(sp_date) =10 then Result:=to_date(sp_date,'YYYY-MM-dd'); end if; if LENGTH(sp_date) =8 then Result:=to_date(sp_date,'YYYYMMdd'); end if; return(Result); end getdate; 分类: ...
3、IN OUT 参数类型:表示参数既能够传值,也能够被赋值。 四、无参函数 1)定义无参函数--- create or replace function fn_PrintToday return date is begin return sysdate; end; 2)调用无参函数--- --调用方式1 SELECT fn_PrintToday() FROM DUAL; --调用方式2 begin dbms_output.put_line(fn_PrintT...
例如firstDate := lastDate + 1，如果firstDate和lastDate都是日期型字段，lastDate是20120228，加1的结果是20120229、+2得到20120301。原因是2012是闰年2月有29天，+2后日期达到30，数据库系统自动把20120230转换成20120301。SQL> SELECT to_date('20120228')+1,to_date('20120228')+2 FROM dual;TO_...
Uses of Oracle CURRENT_DATE Function Retrieve Current Date:Get the current date based on the session time zone. Time Zone Awareness:Display the current date and time according to the session's time zone. Date Formatting:Use with NLS_DATE_FORMAT to display the current date in various formats. ...
oracle日期函数(Oracledatefunction) Oracle日期函数 trunc(SYSDATE,Q’)--本季度第一天 trunc(SYSDATE,会')--本周的第一天(周日) 查询Oracle日期格式 --- SELECT*FROMnls_database_parameters; 得到结果如下表:表中nls_date_format表示日期格式。 参数值 --- --- nls_language美国 nls_territory...
oracle.rules.sdk2.datamodel.Function All Implemented Interfaces: java.io.Serializable, java.lang.Cloneable, java.util.Map<java.lang.String,java.lang.Object>,Callable public classFunctionextendsConstrainableComponent<Function> implementsCallable Represent a RL function In addition to the usual getters and...
The following values of the InfoType argument return a list of the SQL data types to which the data source can convert the specified SQL data type with the CONVERT scalar function:SQL_CONVERT_BIGINT SQL_CONVERT_BINARY SQL_CONVERT_BIT SQL_CONVERT_CHAR SQL_CONVERT_DATE SQL_CONVERT_DECIMAL SQL_...
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...
While you’re here, if you want an easy-to-use list of the main features in Oracle SQL, get my SQL Cheat Sheet here: Get the Oracle Cheat Sheet Get The Cheat Sheet Oracle TO_DATE Format Mask The Oracle TO_DATE function includes a “format mask”. The format mask is helpful as it...
This Oracle tutorial explains how to use the Oracle/PLSQL TO_DATE function with syntax and examples.Description The Oracle/PLSQL TO_DATE function converts a string to a date.Syntax The syntax for the TO_DATE function in Oracle/PLSQL is: TO_DATE( string1 [, format_mask] [, nls_...