oracle webcenter

Share: Oracle System Variable Function usage instructions, oracle VariablesIn Oracle databases, Oracle System variable functions are frequently used. Let's share the usage of Oracle System variable functions. Oracle functions are

Oracle cross-database query replication table data distributed query introduction, oracle Method 1: Currently, most databases require distributed queries. The following describes how to configure cross-database access in oracle.For example, there are two database servers and two databases are installed. Database server A and B. Now, database A accesses database B. Step 1: configure the tnsnames. ora File (T

ORACLE multi-Table query optimization and ORACLE Optimization ORACLE has a high-speed buffer concept. This high-speed buffer is used to store the executed SQL statements. Therefore, oracle has to do a lot of work when executing SQL statements, such as parsing SQL statements and estimating index utilization, bind variab

Oracle object-oriented and set-oriented, oracle object-oriented This is a summary of my recent learning experience. 1. oracle object-oriented We all know that SQL is set-oriented, but it is undeniable that there are many places in oracle that reflect the object-oriented thinking. (This is also a sign that major languag

Some Oracle database query optimization suggestions are comprehensive, oracle Database 1. To optimize the query, try to avoid full table scanning. First, consider creating an index on the columns involved in where and order.2. Try to avoid null value determination on the field in the where clause. Otherwise, the engine will discard the index and perform full table scanning, for example: select id from t whe

Common oracle knowledge accumulation and oracle knowledge accumulation1. Basic operation 1. Table operation 1.1 copy and create a table Create table test as select * from dept; -- copy data and structure from a known table Create table test as select * from dept where 1 = 2; -- copy the structure from a known table but not including data1.2 copy and insert Insert into test select * from dept;1.3 create a te

[One of Oracle XE series] install Oracle XE11gR2 X64 database in Windows10_X64 environment, and create database in oraclexe I. Installation 1. Go to the Oracle official website to download the XE installation package [Download path] (Oracle Database Express Edition 11GRelease 2 for Windows x64), decompress.

Oracle execution plan mechanism to improve query performance new SQL statements is the most important component of the Oracle SQL statement execution time. However, by understanding the internal execution plan generation mechanism of Oracle, you can control the number of times that Oracle spends evaluating the connect

Oracle 8.1.7 . 4. Upgrade Oracle 10.2 Oracle provides an update tool that allows you to upgrade the database from a lower version to a later version, and the 8i can be upgraded directly 10g But 8i must be 8.1.7 . 4 (inclusive) or later versions, 8.1.7.0 is not supported. Oracle provides two upgrade Meth

Bob WynneOracle PR+ 1.2.16.506.5834Bob.wynne@oracle.com Roy LoboOracle Investor Relations+ 1.2.16.506.4073Investor_us@oracle.com Oracle responds to bea letter Redwood Shores, Calif .,12--200-2007 pmOracle Corporation (NASDAQ: orcl) today delivered the following letter to the board of directors of BEA Syst

Create a log file in oracle and an oracle Log File The syntax for creating a log file is as follows: Alter database database_name add logfile [group group_number](File_name [, file_name [,...]) [SIZE number] [reuse]; The syntax is described as follows; Group group_number is the ID of the specified group in the log file. File_name creates a log file Member for this group Size number indicates the size of log

Followed by the above article: http://ixdba.blog.51cto.com/2895551/880511 14. Install Oracle Clusterware 1) decompress the Software PackageAssume that all the database software is in the/rac directory. First, extract the two Oracle software packages as follows:[Root @ node-rac1 rac] # lsLinux_11gR1_database_1013.zip linux_x86_11gR1_clusterware.zip[Root @ node-rac1 rac] # unzip linux_x86_11gR1_clusterware.zi

ORACLE stored procedure details, oracle Stored ProcedureORACLE Stored Procedure explanation 1. Definition A Stored Procedure is a set of SQL statements used to complete specific database functions. The SQL statement set is compiled and Stored in the database system. When using this function, you can call and execute a stored procedure by specifying the name of the stored procedure you have defined and provi