Oracle

In-depth understanding of Oracle Table (3): three major table join Methods: Nested loop join and Sort merge join in-depth understanding of Oracle table (1): ORDERED and USE_NL http://www.bkjia.com/database/201301/186604.html In-depth understanding

Oracle service description 1. OracleCSService process: ocssd.exe cluster Synchronization Service (css)-manages cluster configurations. By controlling nodes, the member clusters and notification members are added to or removed from the cluster when a

Oracle automatically backs up and deletes the previous backup file for batch processing. I found some information from the Internet, sorted out oracle's automatic backup batch processing, and saved the following code. bat can be used together with

Oracle autotrace parameter description SQL> set autotrace traceonly explainSP2-0613: unable to verify PLAN_TABLE format or entity SP2-0611: Error resolution when enabling EXPLAIN Report: www.2cto.com 1. log on to CONNECT/@ as SYSDBA as a SYS user; 1.

Today, I want to go into something meaningless: many people know that it is meaningless to use null values for comparison. But have you ever actually tried it?Try to see if there are some strange phenomena. Let's take a look at the following two

ORACLE encountered a problem with the permission to call the dbms _ package during the storage process: ETL @ RACTEST> begin 2 DBMS_LOCK.sleep (1); 3 end; 4/PL/SQL procedure successfully completed. www.2cto.com but ETL @ RACTEST> create or replace

To establish logical standby, you must first establish physical standby. The process of establishing physical standby is omitted. The main process of the logical DB at www.2cto.com is reader (read redo entries) ---> prepare (generate LCR) --->

How Does Oracle query the complete definition statement Syntax of an object: www.2cto.com DBMS_METADATA.GET_DDL (object_type IN VARCHAR2, name IN VARCHAR2, schema IN VARCHAR2 default null, version IN VARCHAR2 DEFAULT 'compute ', model IN VARCHAR2

ORA-00600: internal error code, arguments: [keltnfy-ldmInit], [46], [1] error handling 1 I wanted to deploy Data Guard today, but the slave database reported an error at startup: www.2cto.com ORA-00600: internal error code, arguments:

Precautions for oracle Import and Export: The oracle Import and Export solution is the main melody of backup and reply, not dba. There is not much research on data import and export, and there is only a little bit of experience in the use process,

The concept of oracle 11g distributed uard was discussed a few days ago. Which of the following types of oracle 11g distributed uard are: Physical standby and logical standby2, I did not expect that after reading the oracle 11g online documentation

For the stored procedure of displaying the execution plan in the Oracle index access mode, see http://www.bkjia.com/database/201303/192688.html (1) unique index scan of index unique scan. A single match is performed for a unique index. In a unique

ORA-39700: database must be opened with UPGRADE option solution 1. The error operating system and database are installed by the service provider, after a few months to remember to use this database, the following error occurs at startup.

Several result set operation commands that are well known for the operation information of oracle result set are tested in detail today. Some problems are found and the test preparation is recorded. Www.2cto.com suppose we have a table Student,

Modify the default authentication method of OracleOracle's default authentication method is OS authentication. Therefore, if you log on to the server with an oracle account, you do not need to log on to the database. you can log on to the database

Oracle Trigger 1-Introduction to Reasons to Use Trigger: ■ Automatically generate calculated column values ■ Log events ■ Gather statistics on table access ■ Modify table data when DML statements are issued against views ■ Enforce referential

The SQL subquery of the Oracle database is described in the preface, considering this situation: queries which employees have higher salaries than SMITH. To solve these problems, we need to first query the SIMTH salary and then compare the salaries

A cainiao's oracle road -------- 3. knowledge points learned today include 1. Non-correlated subqueries learn the data environment and syntax of non-correlated subqueries 2. correlated subqueries Compare non-correlated subqueries, GRASP syntax 3,

A brief understanding of the two concepts of cache and buffer during Oracle and MySQL learning. I checked these concepts and found them easy to understand and record here for the sake of forgetting (I) cache, is a method used to accelerate reading.

Oracle unconventional recovery (skip archiving with BBED) I. BBED tool 1. the BBED package is missing in oracle 11g installation of bbed, oracle11g bbed install and example 1. upload (sbbdpt. o ssbbded. o bbedus. msb, which copies the linux64