Oracle

With the popularization of computers and the development of networks, databases are no longer just the proprietary topics of programmers. Oracle databases, however, have a place in the database market thanks to their superior performance and

  Oracle SQL Performance Optimization (1) select the most efficient table name sequence (only valid in the rule-based Optimizer ): The ORACLE parser processes the table names in the FROM clause in the order FROM right to left. The table written in

  SQL code -- Ref cursor /* Show multiple rows of a cursor Implicit cursor data manipulation language DML and single-line select into statement 1. Define a cursor Select result set statement corresponding to the cursor CURSOR cursor_name IS

Dblink between database versionsServer VersionClient 11.1.0 10.2.0 10.1.0 9.2.0 9.0.1 8.1.7 8.1.6 8.1.5 8.0.6 8.0.5 7.3.411.1.0 Yes #6 Yes #6 ES #5 No #3 No #3 No #3 No #3 No #3 No #310.2.0 Yes #6 Yes ES #5 No Was No #3 No #3 No #3 No #3 No #310.1.0

The following is a summary of the problems encountered when oracle 11g uses deferred_segment_creation to create a feature. Problem 1: You can create tables in all tablespaces. Problem 2: exp cannot export empty tables. Problem 1: Version: oracle 11.2

Oracle Wallet login without a password -- 1. check the oracle home System variable c :\> echo % ORACLE_HOME % C: \ Oracle \ product \ 11.2.0 \ dbhome_1 -- 2. find the appropriate location to create the wallet folder c: \> cd % ORACLE_HOME % \

Use the exp;impcommand to export and import racledata databases and execute them in the environment of the local or sqlplus.exe command. The exp command can export data from the remote database server to a local dmp file, and the imp command can

Today, I will share with you the solution for oracle Database rman remote recovery. If you do not want to go to the reference page, the specific method is as follows. I want to implement data guard between two sets of rac. Because datafile,

[1] 1. select name, log_mode from v $ database; NAME LOG_MODE ------------------ ------------------------ query noarchivelog 2. use the archive log list Command Database log mode No Archive Mode Automatic archival Disabled Archive

Dmp File Import and Export Steps -- The path of the datafile is provided at will, but the subsequent file name is dbf LOGGING DATAFILE 'd: \ OracleDateFile \ DTBS. dbf' SIZE 32 M AUTOEXTEND ON NEXT 32 m maxsize 2048 M Extent management

When importing data using impdp today (converting schema in the same database ),ORA-39083: Object type TYPE failed to create with error:ORA-02304: invalid object identifier literalThe specific error SQL statement is CREATE TYPE "xx". "xxxxx" OID '1j3

ABS (x)[Function] returns the absolute value of x. [parameter] x, number expression. [Return] number. [Example] select abs (100), abs (-100) from dual; Sign (x)[Function] returns the positive and negative values of x. [parameter] x, number

Anyone who has used Oracle databases knows that the speed and efficiency of Oracle databases are among the best among similar databases, especially when accessing a large amount of data. So what is Oracle Database implemented? I will use a series of

First, understand the concept of the solution, and then understand the relationship between the solution and the database. Let's take a look at their definition:Copy codeThe Code is as follows:ASchemaIs a collection of database objects (used by a

1. view the operating system version SQL> select * from v $ version;BANNER----------------------------------------------------------------Oracle Database 10g Enterprise Edition Release 10.2.0.1.0-ProdPL/SQL Release 10.2.0.1.0-ProductionCORE 10.2.0.1.

Set oralce Automatic Memory ManagementShutdown and restart are required to enable oracle automatic memory management.1. Determine the sga pga memory size:Copy codeThe Code is as follows:SHOW PARAMETER TARGET 2. determine the maximum pga usage since

The idea of Oracle paging stored procedures is the same as that of SQL Server, but I have made some changes here because of the differences in Oracle syntax and rules, the Oracle paging Stored Procedure looks a little different. Smile!Cursor

1. What is an execution plan) Execution Plan: the execution process or access path of a query statement in ORACLE.Ii. How to view the execution plan1: Press F5 under PL/SQL to view the execution plan. Third-party tools such as toad.Many people think

This brings many benefits, but it also requires learning new concepts, commands, usage, and management tasks. So before you invest in your production system, let's look at what it solves, what it manages, and what it looks like.Why create it?The

/*The younger brother just came into contact with the ORACLE stored procedure and asked me a question. The younger brother wrote a stored procedure to receive a parameter as the table name, then, you can query the content of one field of all records