data dictionary tables in oracle

dictionary tables are not directly accessible, butyou can access information the them in through the data dictionary views. To list Thedata dictionary views available to you, query the viewdictionary. Many data

Tags: delete object date ora suffix case border SQL modify table Oracle tableIn fact, for a database, each table represents a database object, and the database object refers to all the operations of the DDL definition, for example: tables, views, indexes, sequences, constraints, and so on, all belong to the object, so the establishment of the table is the establishment of objects, and the operation of the o

with hint is a fast full scan of the index pk_emp_test for Oracle to go to the primary key index(Emp_test is the table name Pk_emp_test is the primary key compound index of the table empno is the field of the query)Select/*+ index_ffs (emp_test pk_emp_test) */empno from Emp_test;⑤: Indexed skip Scan (index skip scan)Index-hopping scanning applies all types of composite B-tree indexes, including unique and non-unique indexes, which specify query crite

'); --------------------------------------------------------------------------------------------------------------- ---------------------- ORACLE:----Common Data dictionaryUser_Records information about user objects, such as user_tables contains all tables created by the user; user_views,user_constraints, etc.;All_To record the information of the user object and

PostgreSQL export data dictionary documentation You need to sort out the data dictionary documents of the current database on the project. The project is not standardized. Such documents should be supplemented later. Each field in these tables is written to a Word document w

Label:oracle11g Common Data Dictionary The name of the Oracle data dictionary consists of a prefix and a suffix, using the _ connection, meaning the following: Dba_: Contains all object information for a DB instance V$_: Dynamic view of the current instance, including views

Tags: Oracle replication Table Replication temporary table replication viewCreate a table new_table and old_table table structure (no old_table Records)CREATE TABLE new_table as SELECT * from old_table where 1=0;Create a table new_table and old_table table structure (with Old_table Records)CREATE TABLE new_table as SELECT * from Old_table;Copy a table to another tableINSERT INTO new_table select * from Old_table;Create a view, delete a viewCreate or R

oracle11g Common Data Dictionary The name of the Oracle data dictionary consists of a prefix and a suffix, using the _ join, meaning as follows: Dba_: All object information containing the database instance V$_: Dynamic view of the current instance, containing views used for

1.1 Partitioned Tables Partition tableIn Oracle, if you encounter a particularly large table, you can use partitioned tables to change the performance of their applications.1.1.1 Partition Table Establishment:A company generates huge sales records each year, and the DBA suggests to the company that quarterly data be pl

Tags: partition description ESS synonym param database meaning parameter. NetExt: 79760698The name of the Oracle data dictionary consists of a prefix and a suffix, using the _ connection, meaning the following:Dba_: Contains all object information for a DB instanceV$_: Dynamic view of the current instance, including views used by system management and system opti

Data dictionary generation tool travel series Article navigation, tool generation tourData dictionary generation tools travel articles navigation Publicity Data dictionary generation tool, data

, temporary segment activity, rollback segment activity, and table scan. The DBA can analyze these four factors, find out the crux of the low hit rate of the database. 1) dictionary table Activity When an SQL statement arrives at the Oracle kernel for the first time, the database analyzes the SQL statement. The data dictionar