開發項目時,遇到一個錯誤:"[Oracle][ODBC]Numeric value out of range."經查,應該是資料值超過欄位的定義長,但是檢查了良久,仍然沒有發現超長的資料. 最後,終於發現有個這樣的問題,不知是否為Oracle適配器的一個BUG.目標為Oracle資料庫,採用Oracle適配器進行資料交換,如果目標表中有date類型的欄位,而對該欄位未賦值,則會出現問題.報錯:"[Oracle][ODBC]Numeric value out of
What is the Oracle Diagnostic Methodology (ODM)? [ID 312789.1]ODM TEST:查詢語句:select to_number(addr,'xxxxxxxxxxxxxxxx') from v$latch_parent where name='process allocation'; select name from v$latch_parent where name like '%library%'; select
Oracle官方參考:PL/SQL Language Referenc->9 PL/SQL TriggerReasons to Use Trigger:■ Automatically generate calculated column values ■ Log events ■ Gather statistics on table access ■ Modify table data when DML statements are issued against views
案例:一個應用表中的一個欄位是主鍵,向表中插入資料時,先把資料放在暫存資料表中(沒有主鍵)然後再插入應用表。這時候如果暫存資料表中有重複資料,無論是主鍵欄位businessid有重複,還是一整行有重複都會報出違反唯一主鍵約束錯誤。方法:group by XX having count(*)>1,rowid,distinct,temporary table,procedure1、查詢表中的重複資料a.重複一個欄位b.重複多個欄位c.重複一整行建立測試表:create table cfa (
Instead of 觸發器可以在由一個以上的表組成的視圖上進行insert,update,delete,merge.也可以使用instead of 來建立分區表等。建立instead of 觸發器文法:1 CREATE [OR REPLACE] TRIGGER trigger_name 2 INTEAD OF operation 3 ON view_name 4 FOR EACH ROW 5 BEGIN 6 ...code goes here... 7 END;
在oracle中處理日期大全 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
When I tried to install Oracle 8i on Win2K with SP4, the setup program just did not startup.There seems to be a known issue:CPUID detection for Intel. Pentium. 4 processor system:Intel has identified that applications which use the Symantec Just in