Oracle

(1) A database consists of one or more tablespaces;   (2) A tablespace is composed of one or more data files, so that multiple tablespaces do not share one data file. A data file only belongs to a tablespace.   (3) segments are composed of one

Original article: http://www.techonthenet.com/oracle/functions/bfilename.php   In Oracle/PLSQL,BfilenameReturns a bfile locator pointing to a physical lob binary file. Bfilename FunctionSyntax: Bfilename ('Directory ', 'filename ')

Oracle is installed on your machine, and the systems you usually write are connected to it. I suddenly couldn't connect to Oracle the day before yesterday. JDBC always reports an error, but I can use PL/SQL. A lot of errors have been thrown, and

TheTimestampDatatype is an extension ofDateDatatype. It stores the year, month, and day ofDateDatatype, plus hour, minute, and second values. This datatype is useful for storing precise time values. SpecifyTimestampDatatype as follows: Timestamp [(

An expression list is a combination of other expressions.   Expression lists can appear in comparison and membership conditions and inGroup ByClauses of queries and subqueries. Comparison and membership conditions appear in the

-- Create SequenceCreate sequence seq_common_logMinvalue 1Max value 999999999999999999999999999Start with 1Increment by 1Cache 20;   -- Create TableCreate Table tu_common_log(Col_sequence number (20) not null,Col_date date default sysdate not

The fastest and most practical way to create a user in Oracle:   Step 1 Select the SQL plus shortcut (E:/Documents and Settings/all users/Start Menu/Program/Oracle-orahome92/Application Development/SQL plus. Use the system's Default User Name

Oracle has the ability to enable a low-level tracking function. Once the trace file is enabled, Oracle will record a lot of valuable information. The tkprof tool is used to convert these trace files into readable formats.   1. Enable tracking Alter

Today I found a problem with the Chinese version of Oracle efficient design,   Chapter 3 selecting less translated architecture I found the first three chapters of the English PDF sample from Google,   Compared with the Chinese version, I found

I bought this book from Dangdang in, because it was written by Tomas Kyte. However, I didn't do Oracle-related projects at the time, and I lacked an environment for testing Oracle scripts. This book is a very practical book, if I do not perform the

1. What isOracleCharacter Set The Oracle character set is a collection of symbols for the interpretation of byte data. It can be divided into different sizes and have an inclusive relationship. Oracle supports the national language architecture,

OS: redhat6 oracle11.2 Description: ORA-00845: memory_target not supported on this system [Oracle @ Oracle DBS] $ sqlplus "/As sysdba"SQL> startupORA-00845: memory_target not supported on this system Solution:[Oracle @ Oracle DBS] $

Pseudo Columns APseudo ColumnBehaves like a table column, but is not actually stored in the table. You can select from pseudo columns, but you cannot insert, update, or delete their values. This section describes these pseudo docolumns:Currval and

Comments You can associate comments with SQL statements and schema objects. Comments within SQL statements Comments within SQL statements do not affect the statement execution, but they may make your application easier for you to read and maintain.

I. Handle handling errors1. When the role appears in Oracle form PL/SQL, the processing method is as follows:If (err_condition) thenFnd_message.set_name (appl_short_name, message_name );Fnd_message.error;Raise form_trigger_failure;End if;2. When the

  I want to import the database from another computer (A) to my computer (B. 1. Export (exp) On your computer, first go to cmd, Then: C: \ Documents ents and Settings \ Administrator> expLpw/lpw @ test6 file = D:/123.dmp (equivalent to exporting the

First, let's talk about the bridge connection: First configure the Data source: Open Control Panel-Administrative Tools-Data Source (ODBC)-user DSN-add-find the Oracle driver. // JDBC-ODBC Bridge ConnectionPublic class connectiontest2 { //

Data Table Name: tm_language Primary key field name: tm_language_id Data Table sequence: seq_tm_language Detailed SQL code: -- Add a primary key (if there is no primary key field, add a primary key field, assign a value, and then add a primary

The system user cannot perform database backup and recovery operations (the XMP Data File Import and Export function ). After creating a user in the previous article, you must specify the user permission for the Import and Export Operation. The

Development Environment: win2003 + Tomcat 5.5 + myeclipse 5.5.1 GA + jdk1.5.0 _ 15 + Oracle9i Software installation path: Tomcat 5.5: C:/program files/Apache Software Foundation/tomcat 5.5Myeclipse 5.5.1 GA: C:/program files/myeclipse 5.5.1 gaJdk1.5.