Oracle

1 --Create a temporary table space2 Create Temporarytablespace pr_temp3Tempfile'F:\app\data\tablespace\pr_temp.dbf'4 size 50m5Autoextend on Next50m maxsize 2048m6 extent management Local;7 --Create a data table space8 Createtablespace pr_data9

Each Oracle database is comprised of three types of files: A data file, a log file, and a control file. The database's files provide true physical storage for database information.Each database has one or more physical data files. The data for a

SELECT * FROM (select A.id,a.oacode,a.custid,a.custname,a.xsz,a.salename,a.communicationtheme, A.communicationproperty,a.communicationtime,a.productmanager,a.creator,a.createdate from Technology_flow a where A.oastate= ' normal end ' union select

Oracle Main type functions: Single-line function: You can enter only one row of results and return a result. Common single-line functions are: Character functions numeric functions Conversion functions Date

Oracle encounters NVARCHAR2 type times wrong character set mismatch when multi-table unionFor places where nvarchar is used, add to_char (nvarchar variable or field)Such as:Select To_char (name), Price from AAUNION ALLSelect To_char (name), Price

1.oracle10g after the download is complete, unzip, select "Setup.exe" to start the installation after the decompression is complete.The 2.oracle home directory location is where Oracle is ready to install, called "Oracle_home", and typically Oracle

National Day seven days leave, decided to calm down to get started Oracle database.Environment: Ocacle 11gThe software installs the package and installs the diagram, everybody may download on my Baidu net disk: Link: http://pan.baidu.com/s/1ntjDEnZ

Linux Setting Oracle Environment variables Method One: Run the export command directly to define the variable, which is valid only under the current shell (bash) or its child shell (bash), the shell is closed, the variable is invalidated, the new

Installation of Oracle1. Download Oracle 11g2. Extract the two compressed packages to the same directory (content merge), i.e. "Database" and click on the "setup.exe" file under the extracted directory as shown in:3. The following command prompt

1. Modify the data in the table: UPDATE statement:Grammar:Updtae table_name SET = value1,... [WHERE conditions](2), unconditional update (without a Where condition update): sql> update userinfo set userpwd= " 111111 " ; 4 rows updated. SQL >

1. Add data to the table (Insert statement):Syntax to add:INSERT into table_name (column1,column2,column3,......) VALUES (Value1,value2,value3,...)The fields after table_name can be omitted, except that each field of values must match the

First, language classification1.DML (Data Manipulation Language): Used for data manipulation.　　DML includes: (1) SELECT: query dataSelect * from temp;(2) INSERT: Add data to DatabaseInsert into Temp Values (4,' Harry ');(3) UPDATE: Used to modify

Linux set up Oracle boot automatically under SystemIn a Linux system, after the Oracle database service is installed, the Oracle service will start automatically at any time by default, as is the case with Windows systems. Linux system, it is

Oracle tablespace operations, oracle tablespace-- View the tablespace SELECT tablespace_name, file_id, file_name, round (bytes/(1024*1024), 0) | 'M' total_spaceFROM dba_data_filesORDER BY tablespace_name; -- create tablespace testlogging datafile

Oracle optimization auxiliary SQL statements, oraclesql statements -- Query the SQL statement being executedSelect osuser computer logon identity,The PROGRAM that initiates the request by PROGRAM,USERNAME: the USERNAME used to log on to the

The Oracle NoLogging Append method reduces the redo_size and nologgingredo_size of batch insert operations. In business processing, the temporary table of the real table is often used to process intermediate results, and the Insert operation of the

Linux Oracle deletes archive logsToday encountered Oracle reported such an error: ORA-00257 to view the next, the original Oracle archiving logs are full, Solution Two One: increase the size of the archive log two: delete useless archive logs (we

The oracle dg slave database does not synchronize the data of the master database. Today, a database synchronization problem occurs. The master database is shut down. After the master database is restarted, the slave database cannot synchronize the

Introduction to the long raw blob clob type in OracleRAW: unprocessed type, which can store binary data or LONG, a variable-length string data. The longest value is 2 GB. LONG has the feature of VARCHAR2 columns, you can store up to one LONG column

Goldengate synchronizes one-way DDL operations in Oracle for OracleWe will perform the following test on the source end to execute the table's truncate SQL> truncate Table tcustmer; table truncated. on the target end, check the table data SQL>