Oracle

  It is not easy to process tens of millions of records in Oracle. The following describes how to insert and query tens of millions of records in Oracle.   Recently, we have implemented a project to perform insert and query operations on database

Oracle's ROWID can be divided into two types: Physical ROWID and logical ROWID. The index organization table uses the logical ROWID, and other types of tables use the physical ROWID. SQL> create table test_rowid (id number, row_id rowid );  The

Frequently used:Value assignment: [: =]Connection character: [|]Output: dbms_out.put_line ('some text '); 1. The example of the output of the application variable assignment is as follows:DeclareX varchar2 (10); -- declare a variableBeginX: = 'this

Symptom description:The following error message is returned when the ASM storage management cannot join the disk:SQL> alter diskgroup disk add disk '/dev/rdsk/c2t500601603022E66Ad13s6 ';Alter diskgroup disk add disk

Environment windowThe oralce client and server are on the same machine. The service name and listener are configured on both the client and server. At this time, the service name or listener may not be found when the program is connected.In this

If two Table A (id, xx. xx ...), C (id, Cid, xx, xx ...), the following two methods can be used to pre-implement cascade deletion, cascade update, and data synchronization between IDs in C and IDs in:I.Uses the cascade deletion and cascade update

OEM:Http: // full computer name: 5500/em/ Sys/System managerScott tiger1. Forget the logon password of a user except SYS and SYSTEM.Log On As a sys (or SYSTEM) user.Conn sys/PASS_WORD as sysdba;Use the following statement to modify the user

Tables available: SQL> SELECT deptno, ename FROM emp ORDER BY deptno, ename; deptno ename ------ ---------- 10 CLARK 10 KING 10 MILLER 20 ADAMS 20 FORD 20 JONES 20 SCOTT 20 SMITH 30 ALLEN 30 blke 30 JAMES 30 MARTIN 30 TURNER 30 WARD 14 rows selected.

If the archive log of Oracle is full, an error occurs when the application connects to the database. You need to manually delete the expired archive log as follows:1. Specify database instance $ export ORACLE_SID = db12. Enter rman $ rman3. connect

Method 1: Write the oracle db link by code; create public database link test_link2 connect to twc identified by twc using '(description = (address_list = (address = (protocol = TCP) (HOST = 192.168.0.129) (PORT = 1521) (connect_data = (service_name =

After the tablespace is deleted, the total number of "ORA-01219" errors reported after oracle is restarted is resolved as follows:1. running input: sqlplus/nolog 2. log On as sysdba with the "connect sys/password" as sysdba 3. run alter database

Sort BY Chinese pinyin initials and obtain the Chinese pinyin initials. Introduction: sort BY Chinese Initials, strokes, and radicals. [NLSSORT]: 1) SELECT * FROM T_TABLE order by nlssort (NAME, 'nls _ SORT = SCHINESE_PINYIN_M '); 2) SELECT * FROM T_

Sometimes Oracle databases cannot use indexes. There are many reasons for this phenomenon. How can we locate it? This article mainly introduces this part.First, determine the optimization mode in which the database runs. The corresponding parameter

Environment: PLSQL Developer 7.1.5 Oracle 11.2.0 Oracle does not specify an automatic growth column as MYSQL or MS SQLServer does. However, in Oracle, the SEQUENCE can be used to automatically increase fields. In Oracle, SEQUENCE is called a

LIST partitions of Oracle table partitions allow users to organize irrelevant data together Syntax: [SQL] PARTITION BY LIST (column_name) (www.2cto.com PARTITION part1 VALUES (values_list1 ), PARTITION part2 VALUES (values_list2 ),... PARTITION

Oracle CLEAR user Objects method 1. generate all drop user object statements // (Note: you must use a delete pair to log on to the user for execution; otherwise, the result is quite serious)Spool d: \ drop. sqlselect 'drop' | object_type | ''|

Redo write is triggered in four cases. 1. When LGWR is idle, it checks every three seconds to see if any data is written to redelog from redo buffer. If yes, A background process automatically writes data to it. 2. When a process needs to allocate

Preparation: Modify the startup Item/etc/inittab rpm-qa | grep binutils. If not, install: rpm-ivh *. create a group at rpm www.2cto.com. The user groupadd oinstallgroupadd dbamkdir-p/u01useradd-g oinstall-G dba-d/u01/oracle oraclepasswd

Related Links: Exploring the RMAN_01 concept of ORACLE E/201205/133559 .html; explore ORACLE RMAN_06 backup policy the ultimate goal of http://www.bkjia.com/database/201206/136832.html backup is to better restore data recovery and recovery, in the

Go to the Oracle basic statement 1 interface and go to the oracle sqlplus interface in cmd: sqlplus scott/orcl @ orcl2 connection management connection command conn [ect] sys/orcl @ orcl as sysdba disconnect disc [onnect] Change Password psssw [ord]