data dictionary tables in oracle

As the name implies, a dictionary is like a dictionary used in reality. When a word or word does not understand it, it is used to look up the dictionary. the dictionary contains the language information we use. data is also loaded with a lot of

Some people on the Internet have provided the best optimization ideas: 1. first, extract the records that meet the conditions in the large table to generate a temporary table. 2. then, compare the small temporary table with another small table. Some people on the Internet have provided the best optimization ideas: 1. first, extract the records that meet the conditions in the large table to generate a temporary table. 2. then, compare the small temporary table with another small table. Some

Some people on the Internet have provided the best optimization ideas: 1. Extract the records that meet the conditions in the large table to generate a temporary table. 2. Associate the small temporary table with another small table. No matter whether the thinking is worth discussing, it is very worthy of recognition to regard the temporary table as a transfer station. Temporary tables are essentially cache representations. Temporary

CREATE a TABLE named products, the name of the TABLE followed by the keyword "create table" is defined, three columns are defined, and the data type and size of the column are specified. When creating a table, you can define the integrity constraints of the table, or define the integrity constraints of the column. The general constraints on the column are not null. We will discuss the constraints later. When creating or changing a table, you can give

for, it takes a lot of time. Pdmreader can quickly find the table structure information you want to find, simply by entering a keyword to find the result. Of course, when your PDM (*. after the data dictionary file is changed, pdmreader automatically reads the data dictionary file of the PDM

Data Oracle Data Dictionary is one of the important parts of database, it is produced with the database, which changes with the change of the database, and embodies some tables and views under the SYS user. The data

-----------------------------------------------------------------------Total 3615 365.73 417.76 478241 11442742 26505 11568114 In this test case, the partition COT_IND01_P37 contains nearly 10 million pieces of data, which takes nearly 7 minutes. If the partition data reaches 0.1 billion pieces, the time should be more than 1 hour. If the Hash Partition Number is an integer power of 2 recommended by

Introduction to the use of dual tables in Oracle and the use of oracledual tables Dual is a virtual table used to form the select syntax rule. oracle ensures that there will always be only one record in dual. We can use it to do a lot of things, as shown below: 1. view the current user. You can execute the following st

# employees, you can only perform operations on the table and delete the table when the connection is disconnected. If you create a global temporary table named # employeesAny user in the data table can perform operations on the table. If the table is not used by other users after you create it, delete it when you disconnect it. If the table is createdOtherwise, SQL Server deletes the table after all users are disconnected.Different:1. the SQL Server

by other users after you create it, delete it when you disconnect it. If the table is createdOtherwise, SQL Server deletes the table after all users are disconnected.Different:1. the SQL SERVER temporary TABLE is a "memory TABLE", which is stored in the memory. The ORACLE temporary TABLE is stored in the data dictionary unless DROP TABLE is executed.2. SQL SERVE

Summary of basic table space management operations in Oracle databases, tables in oracle DB storage hierarchy (I drew a sketch and I will take a look at it... XD) Manage tablespaces -System: required to store data dictionary information. It is the first database to be creat

');Sql>select C.constraint_name,c.constraint_type,cc.column_nameFrom User_constraints c,user_cons_columns ccwhere C.owner = Upper (' table_owner ') and c.table_name = Upper (' table_name ')and C.owner = Cc.owner and c.constraint_name = Cc.constraint_nameOrder BY Cc.position;8. Storage functions and proceduresView the status of functions and proceduresSql>select object_name,status from user_objects where object_type= ' FUNCTION ';Sql>select object_name,status from user_objects where object_type=

PL/SQL Related data dictionaryHttp://www.oracle.com/technetwork/issue-archive/2012/12-nov/o62plsql-1851968.htmlSometimes, we encounter the following issues during the PL/SQL development process:1) What database objects does my program depend on?2) which package calls a subroutine or variable in one of the other packages?3) Which of my sub-program parameters use inappropriate data types?4) Do all my subrouti

, whether the field can be classified, such as the date of the year-month-day level, the staff also have a subordinate relationship, the field and normal work is also two types of work attendance record, and the length of work and overtime is not such a sense. So we generally list the attributes that can be categorized, become dimension tables, and maintain the referential relationship between facts and dimensions in the fact table.All in all, the sam

value instead. 7 Select * from Left outer Join on Student.sno=sc.sno; 8 --Right connection: The right outer connection is also called the right connection, which means including all the records on the right side table, matching the records on the left table, and if not, empty. In other words, as in left JOIN, list all of the right table, and the left table is eligible, the non-qualified null value substitution. 9 Select * fromStudent Right outer JoinSc onStudent.sno=Sc.sno; Ten --Natur

Label:Reprint Address: http://www.cnblogs.com/kerrycode/p/3285936.html Temporal table Concepts A temporary table is a database object that is used to temporarily save temporary data (or intermediate data), which is somewhat similar to a normal table, but is quite different. It can only be stored in a temporary table space, not a user's tablespace. An Oracle tempo

Http://www.itpub.net/thread-1478468-1-1.html http://tomszrp.itpub.net/post/11835/520574 Starting with version 11.2.0.1, Oracle offers a new way to allocate space: When you create a segment table, the table is not created immediately, but it is created until the first row of records is inserted, segment, This is not the same as our previous segment creation and spatial allocation methods. Such segments are also calledDelay Segment. Starting with versi

Tags: Oracle online convertBefore the Oracle12.2 version, if you want to convert a non-partitioned table to a partitioned table, there are several ways to do this: 1. Build the partition table and insert the data into the partition table with the INSERT into SELECT, 2, use the method of online redefinition (dbms_redefinition). Their currency is: the first method, if the table has frequent DML operations, es

ORACLE _ create and manage tables, oracle CreationZookeeper ORACLE _ create and manage tables ① Common database objectsTable: A Basic Data Storage set consisting of rows and columns.View: logically related

and input the data (SQL Server, MySQL, Oracle can)Data SheetDataDa Mao: The second step, the establishment of business services and master data (data items, query list method), I taught you before the external data, query list me