一.Session 狀態說明Oracle session 有如下幾種狀態ACTIVE - Sessioncurrently executing SQLINACTIVE KILLED - Sessionmarked to be killedCACHED - Sessiontemporarily cached for use by Oracle*XASNIPED - Sessioninactive, waiting on the
Oracle merge into 的用法詳解執行個體 作用:merge into 解決用B表跟新A表資料,如果A表中沒有,則把B表的資料插入A表;文法:MERGE INTO [your table-name] [rename your table here]USING ( [write your query here] )[rename your query-sql and using just like a table]ON ([conditional expression here]
connect by 是結構化查詢中用到的,其基本文法是: select ... from tablename start by cond1 connect by cond2 where cond3; 簡單說來是將一個樹狀結構儲存在一張表裡,比如一個表中存在兩個欄位: id,parentid那麼通過表示每一條記錄的parent是誰,就可以形成一個樹狀結構。 用上述文法的查詢可以取得這棵樹的所有記錄。 其中COND1是根結點的限定語句,當然可以放寬限定條件,以取得多個根結點,實際就是多棵樹。
一.Oracle XDK 組件 說明 在說明之前,我們先用如下SQL查看一下DB中的組件:SQL> col comp_id for a15SQL> col version for a15SQL> col comp_name for a30SQL> select comp_id,comp_name,versionfrom dba_registry; COMP_ID COMP_NAME VERSION--------
一. Enterprise Manager 組件說明 在說明之前,我們先用如下SQL 查看一下DB中的組件:SQL> col comp_id for a15SQL> col version for a15SQL> col comp_name for a30SQL> select comp_id,comp_name,versionfrom dba_registry ; COMP_ID COMP_NAME
Oracle 組件的資訊可以通過v$option 和 dba_registry 查看: --查看v$option:V$OPTION displaysOracle Database options and features. Typically, although not always, optionsmust be separately licensed, whereas features come with the product and areenabled based on the
一. Oracle 10g1.1 說明在Oracle 10g下,預設情況下,密碼是不區分大小寫。這個是由於密碼檔案的預設參數有關。 C:\Users\Administrator.DavidDai>orapwdUsage: orapwd file=<fname>entries=<users> force=<y/n> ignorecase=<y/n>nosysdba=<y/n> where file - name of