Oracle

Oracle RAC is not supported for one node is rhel5.x and the other node is rhel6.xBecause rhel5.x and Rhel 6.x are seen by Oracle as "different operating system versions"The Oracle Solution SR engineers gave the following reply in full:There shouldn '

Assuming Oracle has an entirely new database ORCL, now it's time to import the database file (. dmp) into this new database ORCL. The detailed steps are as follows: 1. Create a table spaceFor example:Create tablespace Test (tablespace name) datafile

Method One,Just define the "ordinal" as a formula, and set the formula to: Get_block_property (' Block_name ', Current_record) can be implemented, or put this line of statements into the "When-create-record" trigger.Disadvantage: The line number

---Check execution Plan----[Email protected]Select Plan_table_output from table (Dbms_xplan.display_awr (' &sql_id ', Null,null, ' Advanced +peeked_binds '));---all [email protected]SELECT

Oracle uses the rowid data type to store row addresses , rowID can be divided into two types, respectively, suitable for differentphysical rowids: storage ordinary table,clustered table,table partition and Subpartition,indexe,index partition and

Oracle Data Import Export IMP/EXPFunction: Oracle data import and export imp/exp is comparable with Oracle data restore and backup.In most cases, the data can be backed up and restored with Oracle data import and export (no loss of data).Oracle has

Oracle provides two ways to connect to a database, one for proprietary connections and one for shared connections. The difference is that a private connection is a user-to-database server process, and a shared server connection is a process that

In project development, there is a need to extract the date of birth from the identity card information:1. For 18-bit IDs, because there are multiple tables, use their associations, as shown in the following example:Update pfapperosoninformation  p

In the same LAN, the client can not access the remote server, and after the personal summary of the online data, the following settings are required(1) The exception must be set on the Oracle server servers:Control Panel->windows Firewall, advanced

DB version: Oracle database 11g Enterprise Edition release 11.2.0.2.0- 64bitORACLE11G adds new features for virtual columns, as described below:1> can only create virtual columns on the heap organization table (normal table), cannot create virtual

NVL2 (EXP1,EXP2,EXP3)    null function detection expression EXP1,EXP1 not empty value is Exp2, empty is exp3nvl2 (expression, not null set value, null value)   Decimal to percent select  to_char (Round (0.1*100,3), ' 990.99 ')  | |   '% '  from dual

Cause of the problem:Plsql developer cannot connect to 64-bit Oracle server because Plsql is 32-bit, there is no 64-bit version, and Oracle is 64-bit incompatible.Configuration method:1, download 64-bit Oracle, extract two files, unzip the

to modify the Oracle 10g RAC Listener Port number 1523OneModify the Listener.ora to change the 1521 to 1523. Make a backup of the file in advance for quick recoveryTwoModify the Tnsnames.ora, change the remote_listener corresponding value in the

One, the Oracle installation process is slightlyII. SYS user and system user(1) SYS user is superuser, has the highest privilege, has SYSDBA role, has CREATE DATABASE permissionThe default password is Change_oninstall(2) The system user is the

1. IntroductionThere are many backup methods for Oracle databases, regardless of the backup method used, to restore the system at the lowest possible time and cost in the event of a failure. For example, exporting database objects using the Export

About spool(spool is Sqlplus's command, not something in SQL syntax. )For SQL spool data, it is best to define your own format to facilitate direct import of the program, SQL statements such as:select Taskindex | | | | | Commonindex | | |

SelectDepartment_name,city,Count(*) fromDepartments D, employees E, Locations Lwheree.department_id=d.department_id andl.location_id=d.location_id andE.salary> +Group byDepartment_name,city having Count(*)> 2; SelectFirst_Name||' '||last_name

New CDB and PDB introduced in the ORACLE12C versionThe user created after default login to CDB must be a global user in C # #开头If you want to access a table in a CDB, you can use the grant command to assign the rightBut the above empowerment does

Environment descriptionOperating system: redhat6.4 64-bitOracle version: 11.2.0.4 RAC (two node)Disk array: Macro bin 3300eProblem descriptionWhen implementing a RAC cluster years ago, there is only one set of paths in the operating system where the

Http: // localhost: 8080/displays the description of Oracle, localhostoracle Enter http: // localhost: 8080 to display the tomcat homepage. After checking, environment variables in jdk, tomcat, and oracle are set correctly. However, after