PL/SQL用游标(cursor)来管理SQL的SELECT语句。 游标是为处理这些语句而分配的一大块内存。一个对表进行操作的PL/SQL语句通常都可产生或处理一组记录,但是许多应用程序,尤其是PL/SQL嵌入到的主语言(如C、Delphi、PowerBuilder或其它开发工具)通常不能把整个结果集作为一个单元来处理,这些应用程序就需要一种机制来保证...
In the following example, we have defined a type that can store up to 120 dates. DECLARE TYPE Calendar IS VARRAY(120) OF DATE; Declaring PL/SQL Collection Variables You declare variables of a collection type after defining them. As with predefined types like NUMBER, you use the new type ...
Next, let's look at how you would use the Oracle BETWEEN condition with Dates. The following date example uses the BETWEEN condition to retrieve values within a date range. For example: SELECT * FROM order_details WHERE order_date BETWEEN TO_DATE ('2014/02/01', 'yyyy/mm/dd') AND TO...
MONTHS_BETWEEN(SYSDATE, last_stock_date) : MONTHS_BETWEEN « Date Timezone « Oracle PL / SQL
第一部分 SQL语法部分 一、 Create table 语句 语句: CREATE TABLE [schema.]table_name ( { column datatype [DEFAULT expr] [column_constraint] ... | table_constraint} [, { column datatype [DEFAULT expr] [column_constraint] ... | table_constraint} ]...) ...
SQL> Select add_months(sysdate,2) from dual; 4.Months_between(f,s) 日期f和s间相差月数 SQL> select months_between(sysdate,to_date('2005-11-12','yyyy-mm-dd'))from dual; 5.NEXT_DAY(d, day_of_week)返回由"day_of_week"命名的,在变量"d"指定的日期之后的第几个工作日的日期。参数"day...
格式:MONTHS_BETWEEN(DATE1,DATE2)MONTHS_BETWEEN函数返回两个日期之间的月份数。SQL>selectmonths_between(to_date('20090228','yyyymmdd'),to_date('20080228','yyyymmdd'))asmonths from dual;MONTHS---12SQL>selectmonths_between(to_date('20090228','yyyymmdd')to_date('20080229','yyyymmdd'))asmonths fr...
使用位置:过程性语句和SQL语句。 REPLACE 语法:REPLACE(string,search_str[,replace_str]) 功能:把string中的所有的子字符串search_str用可选的replace_str替换,如果没有指定replace_str,所有的string中的子字符串search_str都将被删除。REPLACE是TRANSLATE所提供的功能的一个子集。
ORACLE函数MONTHS_BETWEEN 因系统折旧月份是按当月是否满15天来算是否为一个月,故此研究了下MONTHS_BETWEEN已适应折旧的逻辑 官网函数说明: MONTHS_BETWEEN官网说明 MONTHS_BETWEEN returns number of months between dates date1 and date2. If date1 is later than date2, then the result is positive. If date...
A value between 0-49 will return a 20xx year. A value between 50-99 will return a 19xx year. QQuarter of year (1, 2, 3, 4; JAN-MAR = 1). MMMonth (01-12; JAN = 01). MONAbbreviated name of month. MONTHName of month, padded with blanks to length of 9 characters. ...