data dictionary tables in oracle

1, the function of the data dictionary The data dictionary records the system Information of the data, which is a collection of read-only tables and views. The owner of the data

1. Object definition When the Create command is executed to create an object, Oracle stores the object definition in the data dictionary. 03:31:40 sql> Select Dbms_metadata.get_ddl (' TABLE ', ' DEPT ') DDL from DUAL; Ddl -------------------------------------------------------------------------------- CREATE TABLE "SCOTT". " DEPT " ("DEPTNO" number (2,0),

Data dictionary table for Oracle users, roles, and permissions (System and object permissions), and oracle dictionary 1. Three dictionary tables 1.1 users Select * from dba_users; Selec

specific object information for system views, such as All_tables, user_tables and other reaction systems. Many views have fields and information that are basically consistent with the Oracle corresponding view.Sysobjects is one of the most important system tables, each of which represents a database object, such as creating a table, a view, and the system inserts a record in sysobjects.Most objects also re

Dictionary tables are commonly used. You can set these tables to use the keep pool. First, analyze the dictionary table in the solution to calculate the space. For simplicity, analyze all the tables and call Dictionary

The following lists common data dictionaries and dynamic performance views:I. DBA's most common data dictionary Dba_data_files: Used to query information about database files.Dba_db_links: includes all database links in the database, that is, databaselinks. Dba_extents: information about all partitions in the databaseDba_free_space: Free partitions in all tablesp

: TABLE_NAME,COLUMN_NAME,DATA_TYPE,DATA_LENGTH,DATA_PRECISION,DATA_SCALE,NULLABLE,COLUMN_ID, etc. All_tab_columns: OWER,TABLE_NAME,COLUMN_NAME,DATA_TYPE,DATA_LENGTH,DATA_PRECISION,DATA_SCALE,NULLABLE,COLUMN_ID, etc. Dba_tab_columns: OWER,TABLE_NAME,COLUMN_NAME,DATA_TYPE,DATA_LENGTH,DATA_PRECISION,DATA_SCALE,NULLABLE,COLUMN_ID, etc.*/ /* Get Table Comments: */ SELECT * FROM User_tab_comments /*User_tab_comments:table_name,table_type,comments The corresponding dba_tab_comments,all_tab_comments, th

Tested two case, which belongs to the legacy of the previous blog: InnoDB How to load a data dictionary What did flush tables do? Let's take a look at the InnoDB load data dictionary:First Use: SELECT * from TT;1. Create a Handler objectfunction Call Stack:Open_binary_frmGet_new_handlerInnobase_create

* Data dictionary is an important logical structure in Oracle databases. It is composed of read-only basic tables and views. In these basic tables, all emails from the Oracle server are saved. *

Importance of oracle data dictionary and dynamic performance table: because the data dictionary contains user information, we need to query the data dictionary when logging on and have

.3. Data Stream: a data stream consists of one or more fixed data items. When defining a data stream, it not only describes the name and composition of the data stream, but also specifies its source, destination, and data traffic.

group of tables and view structures. They are stored in the SYSTEM tablespace. When users encounter difficulties in operating the data in the database, they can access the data dictionary to view detailed information. You can use SQL statements to access the database data

The role of reference tables and reference fields in the ABAP data dictionary when you first create a table and Structure in SE11, you will encounter a problem. If you set a field to the quan or curr type, that is, when the quantity or amount is used, a reference table is always required...When you first create a table and Structure in SE11, you will encounter a

) +1); i){ //assigns the value of the i-1 to the number$("#"+i). Parent (). Prev (). HTML (i-1); //assign a value of i-1 to the deletion of a hyperlink$("#"+i). Parent (). Next (). HTML (""+ (I-1)+"\ ") ' >");// //assigns the value of I-1 to the ID of the text box, which is used to delete$("#"+i). attr ("ID", (I-1));//set the ID to i-1 } }} JSP Code:"0"cellpadding="1"rules=" All"Bordercolor="Gray"Border="1"Id="Dicttbl"style="Border-right:gray 1px solid; Border-top:gray 1

Tags: directory-o discussion alt no user base field in generalA data dictionary is a collection of tables and views where Oracle stores critical information. The Oracle process maintains these tables and views in the SYS mode, tha