oracle dba tables

Temporary tables: In addition to permanent tables, oracle can also create temporary tables to store session private data. These data only exists during the continuous existence of a transaction or session. The CREATEGLOBALTEMPORARYTABLE statement creates a temporary table at the transaction or session level. For transa

Recently, considering the usage of temporary tables in the database write stored procedures It is still unclear how the database is processed, whether it is consistent with the SQL server processing method. Are there any problems, such as potential risks? To avoid unnecessary troubles in the future, I have done a lot of work. I have studied and reviewed some authoritative materials. I hope you will be able to deal with them. Note the following for

The following statements are used to query all your tables in Oracle. If you are interested in oracle queries, take a look. Select * fromall_tab_commen The following statements are used to query all your tables in Oracle. If you are interested in

for all the current user's partitioned tables:SELECT * FROM User_part_key_columns --Displays the child partition column to display the child partition column information of all partitioned tables in the database:SELECT * FROM Dba_subpart_key_columns --Displays the child partition column information for all partitioned tables accessible to the current user:SELECT * FROM All_subpart_key_columns --Displays th

Tips for using temporary tables in Oracle stored procedures 1. Oracle temporary table knowledge in Oracle, temporary tables are divided into SESSION and TRANSACTION. SESSION-level temporary table data exists throughout the SESSION, the temporary table data at the TRANSACTION

1. Preface At present, all use Oracle as database support platform application, most of the data volume of the system, that is, table data volume is generally in millions above data volume. Of course it's a good choice to create partitions in Oracle, but when you find that your application has more than one table associated, and most of these tables are large, an

The following statements are used to query all your tables in oracle. If you are interested in oracle queries, take a look. Select * from all_tab_comments-- Query tables and views of all users Select * from user_tab_comments-- Query the user's tables and views Select * from

In Oracle databases, we often need to manually analyze tables and indexes, as well as all tables and indexes in a certain mode. Oracle provides two Analysis Methods: db In Oracle databases, we often need to manually analyze tables

Oracle| Notes | performance Oracle Performance Diagnostics-Learning Statspack Notes (iii) [Classification of tables] Author: Liu Yingbo Time: 2004-3-10 Mail:liuyingbo@126.com, please correct me. Reprint please indicate the source and the author Description: Statspack does not capture all the information needed to fully analyze performance issues. In pa

First, you must understand that the physical structure of the database is determined by the operating system files of the database. Each Oracle database consists of three types of files: data files, log files, and First, you must understand that the physical structure of the database is determined by the operating system files of the database. Each Oracle database consists of three types of files: data file

Oracle Temporal tables can be said to be a good way to improve the performance of database processing, when there is no need to store , only in the Oracle temporary table space. I hope this article will be helpful to everyone.　　1. PrefaceAt present, all applications using Oracle as a database support platform, most of

Oracle query of intersection of two data tables Oracle query of intersection of two data tables The ORACLE tutorial is: query the intersection of two data tables in Oracle.

When to use Oracle partitions: 1. Tables with large data volumes, such as tables larger than 2 GB. On the one hand, a 2 GB file is an upper limit for 32-bit OS, and the backup time is long. 2, When to use Oracle partitions: 1. Tables with large data volumes, such as

For a traditional relational database management system (RDBMS), such as Oracle, MySQL, etc., are stored and retrieved data in the database, in Oracle, a schema to represent a logical data structure or a collection of schema objects, schema objects are user-created, Used to directly reference data in a database, where the most important objects are tables and ind

1. Create a new tableCREATE TABLEYsb_log (ID Number(8)Primary Key not NULL, Tbdatevarchar( -)NULL, Tb_timevarchar( -) not NULL, Tblogvarchar( -) not NULL, Tbreorvarchar2( -)NULL, BSvarchar( -) not NULL );In Oracle, sequence is the so-called serial number, which is automatically incremented each time it is taken, and is typically used where serial numbers need to be sorted.2. Create a self-incrementCreate1 99999999--the largest paper with 1

The external table is the table structure that is stored in the data dictionary, and the table data is stored in the OS file's tables. By using an external table, you can not only query the data of the OS files in the database, but also use the Insert method to load the OS file data into the database to implement the functionality provided by Sql*loader. After you create an external table, you can query the data for the external table, execute the con

When you cache intermediate data, you need to create a temporary table, in fact, Oracle itself is very much considered in this respect, unless there are some advanced applications, I would consider to create a temporary table. At present, all applications using Oracle as a database support platform, most of the data volume of a large system, that is, the table of data is generally the amount of data above m

OracleFaq (how to change the column name and sequence of tables in ORACLE ). If you need to reprint it, please indicate the source! Anyone who has used ORACLE knows that it is very cumbersome to change the column name and sequence of tables in ORACLE. here is a simple method

Oracle does not distinguish whether tables or indexes are stored in tablespaces. When the data volume is small, you can place tables and indexes in the same tablespace. However, as the data volume increases, it is best to separate the tables and indexes and store them in different tablespaces because: 1) improve perfor

autoextend on;6--Create a user and make a table spaceCreate user username identified by 123456 default tablespace mythTemporary tablespace myth_temp7.--EmpoweringGrant DBA to Username8.--win + R9.--cmd10.--Import CommandIMP new username/password @ instance name file=dmp file path \ filename. dmp fromuser= User name touser= new user name when exportingImp uwp_cfgh_root/[email protected] file=c:\server\201711088.dmp fromuser=uwp_cfgh_root touser=uwp_cf