Oracle

The V$sql_plan view provides a way to check the execution plan of a cursor that is still in the library cache. The information in this view is very similar to the information in the Plan_table view. However, EXPLAIN plan shows the theory that can be

One table is named tb, the field segment is named name, and the data type is nchar (20 ).1. If the field data is empty, you can directly execute the following command regardless of the field type:Alter table tb modify (name nvarchar2 (20 ));2. If

1.1 symptom description UseExpAn error occurred while exporting data. The following error message is displayed: EXP-00008: ORACLE error 942 encountered ORA-00942: table or view does not exist EXP-00024: Export views not installed, please sort y

The parameter files used in oracle startup are generally in the following situations:1. Single Instance 1.1 is started by default: In non-rac environments, the parameter files of oracle databases are stored in the $ ORACLE_HOME/dbs directory by

1. Introduction to exp/imp Exp/imp is the oldest two command line backup tools survived by oracle. It is widely used in small database dump, tablespace migration, table extraction, detection logic, and physical conflicts, we can use it as a logical

Concept of high water level:All the oracle segments (segments here, for ease of understanding, we recommend that you use segment as a synonym for the table) have an upper limit to accommodate data within the segments, we call this upper limit "high

Oracle RAC upgrade test is performed in the test environment today. The original version is 11.2.0.3.0 and you want to upgrade it to 11.2.0.4.0, however, during the runinstaller process, [INS-06006] Passwordless SSH connectivity not set up between

Ora-00600 [KGHLKREM1]Symptom:Alert Log error:Sat May 18 07:59:47 2013Errors in file/oracle/PP/saptrace/usertrace/pp_ora_rj630.trc:ORA-00600: internal error code, arguments: [KGHLKREM1], [0x7000008C2000020], [], [], [], [], [], [], []Sat May 18 07:59:

There are many methods for backing up Oracle databases in Linux. Just like mysql, you can use different methods to back up oracle databases. The following section will introduce several backup database scripts. First, we will introduce some commands

Note: The following operating environments are available in CentOS 6.4 + Oracle 11gR2 (Oracle is installed in ORACLE_BASE =/opt/oracle, and ORACLE_HOME =/opt/oracle/11g) After installing and configuring the Oracle database with OUI, Oracle is

Oracle SQL * plus is a client tool that interacts with oracle. In SQL * plus, you can run sqL * plus command and SQL * plus statement.The DML, DDL, and DCL statements we usually call are SQL * plus statements. After they are executed, they can all

Oracle and Microsoft are two major database products in the history of database development. This leaves little room for selection of databases, either Microsoft or Oracle. However, there is a big difference between them. Today, I will talk about

When studying Oracle, you may encounter oracle tablespace recovery problems. Here we will introduce the solutions to Oracle tablespace recovery problems. Here we will share with you. Oracle tablespace recovery plan 1. User tablespace Error:A ora-0115

There are many things worth learning about in Oracle. Here we mainly introduce the character set of Oracle databases, including the national character set. Oracle Database character set (NLS supported by national languages) is used to store, process,

Some media objects and procedures provided in Oracle are defined in Oracle mode to create a table containing the ORDDicom column. If you have any questions about Oracle-related operations, you can read the following articles to understand them. This

If you have some questions about the actual application of Oracle Java Virtual Machine JRockit and Hotspot integration, the following articles mainly refer. Introduction to the actual application solution of Oracle Java Virtual Machine JRockit and

In Oracle date usage, the formats of the parameters _ date ("string to be converted", "format to be converted") must match with each other. Otherwise, an error is reported. For this question, the following articles provide relevant solutions, and

The following articles mainly introduce some FAQs about Oracle products. In practical applications, we may choose Oracle product FAQs? There will be a lot of things you don't understand, for example, 10 Gb is better than 9i? What types of Oracle

If you want to succeed as an Oracle database DBA, you must have some questions about the relevant Oracle Database DBA. The following are some practical questions and answers, the Oracle Database DBA exam brings you some gains. 1. Explain the

This article describes two different connection methods for tables in Oracle databases. If you want to learn more about these two connection methods, you may wish to browse the relevant content of the following articles and believe it will bring you