oracle dba tables

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

Original: Oracle create user, authorize user, create TABLE, query tableOracle creates users, authorizes users, creates tables, queries tablesAssuming that all of the oracle10g have been installed and configured.The first step: Win+r, enter run, CMD;The second step: Connect Super Administrator SYSDBA, statement sqlplus/as SYSDBA;The third step: (Assuming the connection is successful) input Conn/as sysdba;Fou

4. Create oracle username tablespaces, tables, insert data, and user management tables in windows and Linux Log on to the super administrator and run the following command: Create databases, tablespaces, users, and insert data in Windows -- 01 create a tablespace-- Note that the tablespace path is adjusted according to the actual instal

Label: oracle11g default to Empty table is not assigned segment, so when using exp export oracle11g database, empty table will not export! 1, set the deferred_segment_creation parameter to false, whether it is an empty table or a non-controlled table, assign segment. In the Sqlplus command window, execute: SQL>Show parameter deferred_segment_creation NAME TYPE VALUE------------------------------------ ----------- ------------------------------ deferred_segment_creation boolean TRUE SQL> AlterSys

First, Oracle--Create TABLE test ( ID varchar2 (+) primary key not NULL, sort number, name varchar (200))--Field annotated comment on C Olumn test.id is ' id '; Comment on column test.sort is ' serial number ';--table plus comment comment on table test is ' Test table 'Two. Mysql--Create TABLE test ( ID varchar ($) NOT NULL, sort int (one) Comment ' sort ', name varchar (comment ' name ')--table plus Note ALTER TABLE Test comment = ' Test table 'T

. Pk_marbasclass; End Case; Commit; --Remember to commit the transaction End;Create a temporary synchronization intermediate state table structure--determine if the table exists and delete if it existsDeclareNum Number; begin Select Count(1) intoNum fromAll_tableswheretable_name= 'Bd_marbasclass_sync' andOWNER='NC'; ifNum=1 Then ExecuteImmediate'drop table Bd_marbasclass_sync'; End if; End; //** * Name:bd_marbasclass_sync * DESC: Material classification Synchronization

Label:Description of the phenomenon: according to normal configuration, the first startup cannot automatically build the table The key configuration fragments are as follows: Error after startup: # # # The error may exist in Org/activiti/db/mapping/entity/property.xml# # # The error may involve Defaultparametermap# # # The error occurred while setting parameters# # # Sql:select Value_ from act_ge_property where name_ = ' schema.version '# # # cause:java.sql.sqlsyntaxerrorexception:ora-00942:

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

Oracle learning notes series ------ special tables for oracle operation examples and oracle Stored Procedure examples CREATE TABLE dept( deptno NUMBER(2), dname VARCHAR2(14) , loc VARCHAR2(13) ) ; CREATE TABLE emp( empno NUMBER(4), ename VARCHAR2(10), job VARCHAR2(9), mgr NUMBER(4), hiredate D

Oracle initialization, oracle deletes all tables /* Step 2: create a temporary tablespace */ Create temporary tablespace mdb_temp Tempfile 'G: \ data \ oracle \ mdb_temp.ora' Size 10 m Autoextend on Next 5 m maxsize 2048 m Extent management local; /* Step 2: create a data table space */ Create tablespace mdb_d

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

Create Table spaces and users in Oracle and create tables in oracle User name: C # NEWO ========================================================== ============================================ /* Divided into four steps */ /* Step 2: create a temporary tablespace */ Create temporary tablespace C # NEWO_TEMP Tempfile 'e: \ OracleTableSpace \ NEWO \ C # newo_temp.db

stores two or more tables in a single unit cluster 3. Under what circumstances is a clustered table used? Single-table clustering solves large scale data processing in massive database. The composite clustering greatly improves the efficiency of the specific table connection. Clustering plays a great role in improving the efficiency of data reading, but the cost of inserting, modifying and deleting data is relatively large. The most important th

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 data set extracted from the table.Sequence: provides regular values.I

value, where the position in the values clause typically uses the same address-letter suffix as the column name, such as: Id--idaddress characters can be used in almost all SQL statements, not just INSERT statementssuch as:Copying data from other tables syntax is to add a subquery after the INSERT statement No need to write the values clause The list of values in the subquery should correspond to the column names to be inserted in the IN

three standard roles: 1 ". Connect role (Connect roles) -Temporary users, especially those who do not need to build a table, usually give them connect role only. --connect is using Oracle simple permissions, which only have access to other users ' tables, including select/insert/update and delete. --Users with Connect role can also create a chain of tables, view

identified by 123456; Second, delete the user Syntax: Drop user username; Example: Drop user test; If the user owns the object, it cannot be deleted directly, otherwise an error value will be returned. Specifies the keyword cascade, which removes all objects from the user and then deletes the user. Syntax: Drop user username cascade; Example: Drop user test cascade; Iii. Role of Authorization Oracle is compatible with previous versions and provides

Label: --table backups in the Oracle database: --BACKUP statement: After the backup, you can delete all the data sources for this table, but then someone will manipulate the table's data, but remember to restore the data table after the operation is complete. CREATE TABLEDzhyukkt_backup as SELECT * fromDzhyukkt;--query Backup is not successful: SELECT * fromDzhyukkt_backup;--data can be found to prove that the backup was successful --to restore a d

keywords in the Oracle database that can be used specifically for semi-joins in SQL text;Note: When used as a subquery, Oracle often converts those subqueries whose external where condition is exists in or =any to the corresponding semi-join;4.5, Star joins (star join)Star joins are typically used for data warehouse type applications, which are a single fact table and a connection between multiple dimensio

How to Create tablespaces and users in oracle and create tables in oracle1. First, if a user exists Drop user username cascade; 2. if it cannot be deleted, the current user may be in the connection status. You can find the session Select username, sid, serial # from v $ session where username = username; Alter system kill session 'sid, serial #' 3. If you want to be safe, lock the current user first; Alter