Oracle

Backup and restore of Oracle database users and tables can be done quickly and easily using the Plsql-developer tool.Full backup and recovery of Oracle database user data1. Backup1.1 pl/sql-> Tools, export user objects, optionsCommon user objects

The simple reason: When the diagram is convenient to not enter the database, directly in the datafile directory to delete the table space corresponding data fileresult in subsequent database error and cannot delete table spaceerrors are as

Odp.net, Managed Driver SetupThis section explains the setup and configuration steps required for using distributed transactions with Odp.net, Managed Driver.Oracle recommends that applications use. NET's native managed distributed transaction

Oracle Tutorial: Plsql Common Methods SummaryUnder Sqlplus, implement the medium-to-English character set conversionAlter session set nls_language= ' AMERICAN ';Alter session set Nls_language= ' Simplified Chinese ';Key points of knowledge:I.

Multi-Table QueryL Cartesian product : N*mL use associated fields to eliminate redundant data from the Cartesian product : SELECT emp.*,dept. Dname,dept. LOC from EMP, DEPTWHERE EMP. Deptno=dept. DEPTNO; Lmultiple table

Chapter II Application of Oracle database2.1 Table space and user Rights management2.1.1 Table Space2.1.1.1 Classification:Permanent Table SpaceTemporary table spaceUndo Table SpacePurpose of the 2.1.1.2 table spaceAssign different spaces to

Development Course do practice Student Guide 051 les01 pptOracle often connects two tables, called a third paradigm, such as something with an ID characterThe following is the command for the SQL statementSELECT * from departments; Department

  These days in the work encountered a character garbled problem, found in the cmd window sqlplus directly update a Chinese and use @ Call a file for the same update, the storage results are different. For a moment of confusion, it is not clear how

First, Analog truncate operation:Sql> Conn Scott/tigerSql> Select COUNT (*) from T;COUNT (*)----------13sql> truncate TABLE t;Second, restore the data of the TRUNCATE TABLE1. Download the HELLODBA Recovery tool to the database serverUse the terminal

I. Oracle COMMON data typesOne, data definition language (DDL)Data definition language is used to alter the database structure, including creating, changing, and deleting database objects.The data definition language commands used to manipulate the

Original: http://www.cnblogs.com/luluping/archive/2010/03/10/1682885.htmlUnder Sqlplus, implement the medium-to-English character set conversionAlter session set nls_language= ' AMERICAN ';Alter session set Nls_language= ' Simplified Chinese ';

650) this.width=650; "Src=" http://www.vuln.cn/wp-content/uploads/2016/05/616b40704337a0eebeb0cf9f825ca9d5.jpg " alt= "616b40704337a0eebeb0cf9f825ca9d5.jpg"/>The installation interface just popped up when Oracle was installed with the following

At work: After adding a field to a table, add a new field at the end, you want to adjust the position of the new field.1, the original method:--Create a new temporary table to store the correct orderCreate TableA_2 as Select(Column1,colum2,......

Background database operation of a table is found to have been out of suspended animation state, may be that the table is locked by a user, followed by a detailed description of your query is locked table and how to unlock, interested in you can

Temporal table ConceptsA 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

As below, create a new two stored procedure:In the master autonomy transaction, we insert a record, then in the autonomous transaction, we look at the number of rows in the table, then try to insert three records, view the number of rows, finally

Summary: Sybase version: Sybase15 (source side) Oracle version: 11g (target side) Goldengate version: 11.2.0.1.0 (source side), 12c (target side) Personal blog: www.czhiying.cn Goldengate Synchronization principle:Oracle

Originally wrote this program is the boss's request to solve the "update the spatial data in Oracle because the WKT string is too long to error" This problem, the previous update is to insert an SQL statement in the program to update, due to some

turn Xiewmang Sina blogThis paper mainly introduces three kinds of optimization in Oracle Data yard: Optimization of partition, dimension optimization and materialized view, and gives detailed optimization code, hoping to help you.When we do the

1. To optimize the query, avoid full-table scanning as far as possible, and first consider establishing an index on the columns involved in the Where and order by.2. Avoid null-valued fields in the WHERE clause, which will cause the engine to