Oracle

  Table space: Provides the logical structure of the space used by the database. Its physical structure is a data file. A table space can contain multiple data files. Local table space management (LMT)-a new table space management mode that appears

  DBAs are sometimes used.   SQL code SELECT s. Osuser OS _User_Name, Decode (Sign (48-Command), 1, To_Char (Command ), 'Action Code # '| To_Char (Command) Action, P. Program Oracle_Process, Status Session_Status, s. Terminal, S. Program, s.

  The following error is reported when you log on to PL/SQL today: Ora-01033: oracle initializationg or shutdown in progress, unable to connect to Oracle service, The possible cause of the error is that the archive log has just been deleted, and you

When remotely connecting to the database, the following error message is reported: ORA-01031: insufficient privileges An error occurred while trying to grant sysdba to sys. SQL> grant sysdba to sys; Grant sysdba to sys * ERROR at line 1: ORA-0

Case 4: Oracle diagnosis using SQL _trace Problem description: many times, when we perform database operations, such as drop user and drop table, we often encounter such errors. ORA-00604: error occurred at recursive SQL level 1. This prompt is

% TYPE attributeIn PL/SQL, you can declare variables and constants as built-in or user-defined data types to reference a column name and inherit its data types and sizes. This dynamic value assignment method is very useful. For example, the data

The concept of null in java: in java, null indicates that a class or variable is null and does not represent any object or instance. You can assign null to a reference type variable, however, null cannot be assigned to basic type variables. The

Redogap is generated when the redo transmission is interrupted.Generally, when the redo transmission service is restored, oracle automatically checks the gap and solves it by itself. The time required to fix the gap depends on the gap size and the

Related error promptOERR: ORA-12519 TNS: no appropriate service handler foundClient Connection intermittent failure, error ORA-12519Cause: the listener cocould not find any available service handlers that areAppropriate for the client

ORA-12519, TNS: no appropriate service handler foundThe Connection descriptor used by the client was:192.168.1.200: 1521: orclSolution:Select count (*) from v $ process -- current number of connectionsSelect value from v $ parameter where name =

My linux version is centos5.5 and the kernel version is 2.6.18-194. el5. in linux, it is best to install the oracle System with 1 GB memory and 2 GB swap space. The hard disk requires at least 4 GB space.1. Download oracleGo to the oracle official

The PROFILE file of ORACLE is a method to restrict the resources used by database users. For example, you can control the CPU that can be used by sessions or SQL statements, and control your password management policies.After the database is created,

Notes1. Data can be rolled back after being deleted in oracle because it places the original data in the undo tablespace,2. DML statements use undo tablespaces, DDL statements do not use undo, delete is a DML statement, truncate is a DDL statement,

Analysis and Handling of CRS-2409 alarm information problems reported by crs oracle 11.2.0.3 1. Check the CRS alert log of 1st nodes and find the following exception information 19:27:17. 609 [ctssd (18809056)] CRS-2409: The clock on host XXXdb1 is

When the physical standby generation GAP is simulated, the gap in the dataguardOracledatabase database may be generated because the archive file is too large or the network is unstable, and some archives cannot be uploaded to the standby. General

[Oracle] SQL * Loader detailed tutorial (3)-control file is the most important file in SQL * Loader, it defines the location of the data file, the data format, and the behavior of configuring the data loading process. This section describes the

The oracle trigger example creates a DML statement-Level trigger. When the INSERT, UPDATE, and DELETE operations are performed on the emp table, it automatically updates the data in the dept_summary table. DDL statements cannot be directly called in

Oracle multi-row record merging user-defined functions (udfs) are used to merge fields in oracle databases. You can use the wm_concat (column) function. However, this method is not recommended by Oracle, because WMSYS users are used for Workspace

Oracle may encounter tar databases during PSU. What is Inventory if it is not properly installed? Oracle OUI is used to manage the Oracle installation directory. Inventory registers the component and version of the database installed under an ORACLE_

SQL tuning advisor (STA) for Oracle SQL Optimization)SQL Tuning Advisor (STA) is an oracle SQL optimization subsidy tool. In fact, there are two main solutions to optimize SQL. One is to rewrite the SQL itself. To rewrite SQL, you must have a good