Database Administrator

Create order Path: Order Management> Orders, Returns> Sales Orders Enter order header information, customer, order type, sales personnel Enter order body information, enter materials, quantity... Then, Book Order, after the Order Book, you

There are already many examples of this error on the Internet. I will record it myself. Error: ORA-00845 after Oracle 11gR2 is started Rac1:/home/oracle> sqlplus/as sysdba; SQL * Plus: Release 11.2.0.3.0 Production onTue Feb 14 09:11:41

◆ The expression of the Oracle Check constraint must reference one or more fields in the table, and the calculation result of the expression Must be a Boolean Value ◆ Can be defined at the table level or field level ◆ Multiple Oracle Check

SQL _code: = 'insert into T_DVR_VOCABULARYITEMS values (sys_guid (), '0', 'activity', 'zhao ruopeng ', '0', sysdate, sysdate, ''' | Voc_system_pid | ''', ''' | voc_pid | ''', ''' | code_pid | ''');'; Execute immediate SQL _code; The above is the

Data Structures Supported by redis: strings, lists, hashes, set, sorted set. Next we will do the experiment one by one. Strings operations include get/set/setnx, append, strlen, getrange/setrange, incr/decr/incrby/decrby, mget/mset. Get/set is to

I. Physical backup and restoration of LVM-based mysql databases: In this case, our msyql database must be installed on a logical volume. The following method can achieve almost hot backup (the reason is that when we create a snapshot, we cannot

What is NLS_LANG? NLS_LANG is an environment variable used to define the language, region, and Character Set attributes. For non-English character sets, the setting of NLS_LANG is very important. NLS: 'national Language Support (NLS) 'when we set an

When installing the Oracle database, you need to set the following system kernel parameters for Oralce propulsion. These parameters are briefly described as follows (the parameter values are kept in the file/etc/sysctl. conf) Kernel. shmmax: the

Oracle 11gR2 RAC and GoldenGate are popular products in Oracle. After a simple study and reading of the document, it is not very difficult to configure a single-node GoldenGate for data replication, however, for the replication from the RAC system

The same data in the Oracle MERGE table: -- Merge the hit rate of a keyword to a fieldUpdate table B set B. times = (Select c. cout from (Select a. keyword, count (*) as cout, min (a. rowid) as temprowid from table a group by a. keyword) CWhere B.

When MySQL is installed using the rpm package, each sub-directory is installed under the corresponding directory. the/usr/local/mysql directory does not exist, when rpm-ql mysql is used, "package mysql is not installed" is displayed. For details,

Create an xtdwtest tableCreate table xtdwtest as select * from dba_objectsSQL> select object_id, data_object_id from dba_objects where object_name = 'xtdwtest ';OBJECT_ID DATA_OBJECT_ID------------------------59436 59436 Execution Plan---------------

One disadvantage of using dbms_output is that the result is output to the screen only after the entire process is completed, in this way, the execution status cannot be monitored at any time through dbms_output output during a long running

The purpose of this article is to read and understand your own books and use this picture to explain. If there are any mistakes, I hope you can correct them and share them with us for the purpose of mutual discussion. First, let's introduce the

After the system runs normally for one month, the following error occurs on the first day of the launch. After a long time, you have no idea. Java. SQL. SQLException: Io exception: Connection refused (DESCRIPTION = (TMP =) (VSNNUM = 169869568) (ERR =

1. Install Oracle asmlib Download the appropriate driver on oracle.com. The version must be the same as that of the operating system kernel. Currently, only the linux operating system has the asmlib package, and other systems do not. Asmlib

Environment: Oracle 10g RHEL 5.8Description: BBED is called data block browsing and editing. Deep Learning of Oracle block and disaster recovery in special circumstances.1. Compile the connection:Cd $ ORACLE_HOME/rdbms/libMake-f ins_rdbms.mk $

When tablespace in the database is deleted today, it is found that it cannot be deleted, the error message is: "ora-00604, ora-02429: Unable to delete the index used to force a unique/primary key. " In the end, it is found that another user did not

RMAN-03022: compiling command: allocateRMAN-03023: executing command: allocateRMAN-00571: ========================================================== ==============================RMAN-00569: ==================== error message stack follows ==========

1. Import ModuleImport MySQLdb >>> help ('mysqldb ')>>> Help ('mysqldb. cursors ')2. Connect to the databaseConn = MySQLdb. Connection (host = 'host', user = 'user', passwd = 'Password', db = 'dbname', port = port) For example: Conn = connect (host =