案例說明: 有A,B兩台oracle資料庫,都為10g,現在有一個A資料庫中one表的幾條資料要插入到B資料庫中的one表?在網上查閱了一下,可以通過在A上建立dblink,當然在B機上建立也是一樣的。開啟sqlplus終端,或者任意的oracle用戶端環境,執行以下SQLcreate database link 連結名 connect to 使用者名稱 identified by 密碼 using '(DESCRIPTION = (ADDRESS_LIST = (ADDRESS
這篇測試一下通過DBLink 訪問含有Blob欄位表的方法。 關於DBLINK 和 Lob 的說明,參考如下連結: Oracle DBLinkhttp://blog.csdn.net/tianlesoftware/article/details/4698642 刪除Dblink 報錯ORA-02024: database link not found
編寫一個預存程序,要求可以輸入表名、每頁顯示記錄數和當前頁,返回總記錄數、總頁數和結果集--oracle的分頁select t1.*,rownum rn from (select * from emp) t1select t1.*,rownum rn from (select * from emp) t1 where rn<=10;--在分頁時,大家可以把下面的sql語句當作一個模板使用select * from(select t1.*,rownum rn from (select *
from http://www.javaeye.com/topic/264448在利用Hibernate的進行標準的SQL進行查詢時,竟然不支援ORACLE的rowid直接查詢: Java代碼 session.createSQLQuery("select rowid from oracletablename").list(); session.createSQLQuery("select rowid from
這條SQL,執行,查詢所有員工當月的考勤記錄匯總,展示全部資料耗時2.3秒String sql = "select userid,orgid," + 子查詢,效能太慢,不適用"(select username from t_acl_userinfo where userid=t.userid) username," +"(select count(state) from t_chk_manage where userid=t.userid and state='01'"+sqlappend+")
Oracle spatial 空間資料SQL查詢操作相關執行個體--select dlbm,dlmc,trim(zldwdm) as zldwdm_1 from gzdt where nvl(zldwdm,'t')='t' or zldwdm='';update gzdt set ZLDWDM='510113106' where nvl(zldwdm,'t')='t' or zldwdm='';commit;delete from gzdt where ZLDWDM like '5101131
TO_DATE格式 Day: dd number 12 dy abbreviated fri day spelled out friday ddspth spelled out, ordinal twelfth Month: mm number 03 mon abbreviated mar month spelled out march Year: yy two digits 98 yyyy four digits 1998 24小時格式下時間範圍為: 0:00:00 - 23:59:59...
有時候會將一列和一系列值相比較。最簡單的辦法就是在 where 子句中使用子查詢。在where子句中可以使用兩種格式的子查詢。 第一種格式是使用IN操作符: ... where column in(select * from ... where ...); 第二種格式是使用EXIST操作符: ... where exists (select 'X' from ...where ...);
Oracle “CONNECT BY”是層次查詢子句,一般用於樹狀或者層次結果集的查詢。其文法是:[ START WITHcondition ]CONNECT BY [ NOCYCLE ] condition The start with .. connect by clause can be used to select data that has a hierarchical relationship (usually some sort of parent->child
Oracle Tips by Burleson ConsultingThis is an excerpt from "Oracle 10g New Features for Administrators" by Ahmed Baraka.Undo AdvisorThe Undo Advisor helps you perform the following tasks:o Set the undo retention periodo Set the size of the undo
Oracle Tips by Burleson ConsultingMarch 26, 2002 - Updated June 28, 2007For complete details on Oracle indexing for high performance, see my book "Oracle Tuning: The Definitive Reference".Oracle includes numerous data structures to improve the