Sort Area Hash Area UGA*n CUA*n 下面分别介绍这两块内存区。 1.1.SGA(System Global Area) SGA(System Global Area 系统全局区域)是一组包含一个Oracle实例的数据和控制信息的共享内存结构。这句话可以说是SGA的定义。虽然简单,但其中阐述了SGA几个很重要的特性:1、SGA的构成——数据和控制信息,我们下面会详...
ORA-01652: unable to extend temp segment by 128 in tablespace TEMP Current SQL statement for this session: SELECT "A1"."INVOICE_ID", "A1"."INVOICE_NUMBER", "A1"."INVOICE_DATE", "A1"."CUSTOMER_ID", "A1"."CUSTOMER_NAME", "A1"."INVOICE_AMOUNT", "A1"."PAYMENT_TERMS", "A1"."OPE...
select floor(sysdate - to_date('20020405','yyyymmdd')) from dual; 5. 时间为null的用法 select id, active_date from table1 UNION select 1, TO_DATE(null) from dual; 注意要用TO_DATE(null) 6. a_date between to_date('20011201','yyyymmdd') and to_date('20011231','yyyymmdd') 那么12月...
public static final SortBy DateUpdated Severity public static final SortBy Severity Method Detail values public static SortBy[] values() Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows...
Mysql基础学习5---排序检索数据(order by) orderbyselect语句的orderby子句,可以根据需要排序检索需要的数据。使用的数据集: 按照单列排序检索 按照日期以递减的顺序输出:selectsystemname,PROCESSNUM ,INSTANCEDATE from instancenumorderbyINSTANCEDATE desc;按多个列排序先按照日期进行排序,在日期相同的情况下再按照系统...
b1 date;begin execute immediate'alter session set statistics_level=ALL';b1:=sysdate-1;fortestin(/*业务SQL(sql后面不需要加";")*/select*from t)loopnull;end loop;forxin(select p.plan_table_output fromtable(dbms_xplan.display_cursor(null,null,'advanced -bytes -PROJECTION allstats last'))p)lo...
在Sort By 窗口中,从下拉菜单中选择 Transaction Date。使用默认的 Ascending 排序。单击 Finish。 7. 您的模板将与下图中所示的模板类似。使用 Microsoft Word 功能修改外观并调整模板的列。 8. 使用Microsoft Word 功能更改列标题,如下图所示。 9. 在表的末尾插入一个新行,以显示到期金额总额。将光标置于最后...
11. Keep Oracle Database software up-to-date with the latest releases. See Chapter 12, "Managing Oracle Database Software". Introduction to Oracle Enterprise Manager Database Control Oracle Enterprise Manager Database Control (Database Control) is the primary tool for managing your Oracle database...
You can eliminate an index from optimizer consideration by taking the index offline or by deleting the index. But with both of these methods you will have to take some actions to bring the index up to date when you bring it back into the database environment. But what if you want to ...
P3_ORDER_DATE P3_ORDER_ID P3_ORDER_MODE P3_ORDER_STATUS P3_ORDER_TOTAL P3_SALES_REP 12. 对于XML Structure,选择 Advanced (include session state information),然后单击 Download XML 按钮。 13. 选择Save to Disk 并单击 OK。 14. 在File Name 域中输入 order_details.xml,然后单击 Save。 15....