su - mysql -c “mysqld_safe –skip-name-resolve –open-files-limit=4096&” cd /usr/local/mysql/bin/ mysqldump -u使用者名稱 -p密碼 –databases 庫名 >/backdata/ddd07-11-15.sql
select case when status='UNUSABLE' then 'alter index '||owner||'.'||index_name||' rebuild online compute statistics;' when to_number(degree)>1 then 'alter index /* '||degree ||' */'||owner||'.'||index_name||' noparallel;'
--分頁第一步 擷取資料物理地址select t.rowid rid, t.lastdate from t_test t order by t.lastdate desc;--分頁第二步 取得最大頁數select rownum rn, rid from (select t.rowid rid, t.lastdate from t_test t order by t.lastdate desc) where rownum <= 10; --分頁第三步
非法關機以後,Oracle資料經常出現這個錯誤:EXP-00056:ORACLE錯誤1033出現ORA-01033:ORACLE initialization or shutdown in progress使用者:口令:這個顯然是資料庫沒有辦法啟動,但是資料庫服務還是可以啟動,但程式無法串連資料庫。首選找問題要看看資料庫BDUMP目錄下的ALERT檔案具體報什麼錯誤你看到最後幾行會有報錯ORA-00600: 內部錯誤碼,參數: [kcratr1_
環境是AIX 6.1,DB2版本9.7.0.7首先查看db2主進程是否存在ps -ef|grep db2sys若不存在使用db2start開啟Database Backup介質為冷備資料來源,cd 到介質所在目錄下:cd /home/db2inst1/backup使用redirect參數來更改目錄:1.>db2 restore db xxx from . replace existing redirect without rolling forwardSQL1277W A
7. Which two statements are true regarding the USING and ON clauses in table joins? (Choose two.)A. Both USING and ON clauses can be used for equijoins and nonequijoins. B. A maximum of one pair of columns can be joined between two
12. You need to produce a report where each customer's credit limit has been incremented by $1000. Inthe output, the customer's last name should have the heading Name and the incremented credit limitshould be labeled New Credit Limit. The column