month spelled out 字符集表示 显示值:11月,若是英文版,显示november Day: dd number 当月第几天 显示值:02 ddd number 当年第几天 显示值:02 dy abbreviated 当周第几天简写 显示值:星期五,若是英文版,显示fri day spelled out 当周第几天全写 显示值:星期五,若是英文版,显示friday ddspth spelled out,...
create or replace function Add_Times(d1 in date,NewTime in date) return date is hh number; mm number; ss number; hours number; dResult date; begin -- 下面依次取出时、分、秒 select to_number(to_char(NewTime,'HH24')) into hh from dual; select to_number(to_char(NewTime,'MI')) ...
selectto_number('$12,322.56','$999,999.99') + 10fromdual; selectto_number('$12,322.56','$00,000.00') + 10fromdual; selectto_number('22.56') + 10fromdual; nvl可以将某个字段的空值转换成指定的值 selectename, sal, nvl(comm, 1.00)fromscott.emp; 9、groupfunction组函数:min、max、avg、...
RETURN NUMBER IS //v_ReturnValue number ; -- 结果数值 v_Component varchar2(10); --日期组件中间转换形式,截取空格并且转为大写 v_YearNum1 number; --减数年份数 v_YearNum2 number; --被减数年份数 v_MonthNum1 number; --减数月份数 v_MonthNum2 number; --被减数月份数 v_HourNum1 number; ...
the function operates on and returns an output row for each group defined by the GROUP BY clause. ■ As an analytic function, LISTAGG partitions the query result set into groups based on one or more expression in the query_partition_clause. The arguments to the function are subject to the ...
CREATE OR REPLACE FUNCTION "GOLDENGATE"."IS_VALID_DATE_FOR_OMS" (i_date date) return number IS o_date date; begin o_date:=to_date(to_char(i_date,'yyyy-mm-dd hh24:mi:ss'),'yyyy-mm-dd hh24:mi:ss'); if i_date < to_date('0001-01-01 00:00:00','yyyy-mm-dd hh24:mi:...
LAG是一个分析函数。它可以在不使用自连接的情况下同时访问到一个表的多行数据。给一个或多个列名和一个游标位置(位移),LAG可以访问当前行之前的行,行之间间隔的行数为位移值。 语法树中的offset(位移)参数是可选的,可以指定一个大于0的整数,如果不指定offset(位移)参数函数会默认位移为1。语法...
Add a month or months to a given date in Oracle ADD_MONTHS() function returns a date with a given number of months added (date plus integer months). A month is defined by the session parameter NLS_CALENDAR. Uses of Oracle ADD_MONTHS() Function ...
ADD_MONTHS(date_expression, month)Code language:SQL (Structured Query Language)(sql) Arguments# TheADD_MONTHS()function accepts two arguments: 1)date_expression Thedate_expressionargument is a DATE value or any expression that evaluates to a DATE value to which the number of months is added. ...
'DD Month Year') Note:When assigning date variables from constants it is much more efficient to say: date_1 = '12-JAN-1989'(date) TO_NUMBER expr TO_NUMBER(expr) Converts the expressionexprof text data type to a number data type. The expression must represent a valid number. So for ...