Oracle

  1. Error: Method not found: "system. data. idatareader Microsoft. practices. enterpriselibrary. data. oracle. oracledatabase. executereader (system. data. common. dbcommand, system. data. common. dbtransaction, system. data. oracleclient.

Use oledbconnection. getoledbschematable (oledbschemaguid. columns, new object [] {null, schemaname, tablename, null}) when obtaining the schema information of a column, the returned datatable column is "data_type ", is to use a number to identify

The V $ view contains information about the data structure maintained by the kernel in the memory, which can be accessed through a DBA account with the Sys permission. The following is a summary of the recovery-related views:   9.1 v $ log

/// The merge statement is a new syntax of Oracle9i, used to merge update and insert statements. The merge statement is used to query another table based on the connection conditions of one table or subquery. The join condition matching is updated,

  Importing and exporting Oracle Data imp/exp is equivalent to restoring and backing up ORACLE data. The exp command can export data from the remote database server to the local DMP file, and the IMP command can import the DMP file from the local to

To_date ('2017-3-24 ', 'yyyy-MM-DD hh24: MI: ss ') Source: http://www.hkln.net/doc/oracle/ SQL /function.htm#a8 Introduction Next Shard to shard Oracle provides some basic data types for Data calculation. These data types can be

1. What is the Oracle character 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

  The foreign key constraint ensures the integrity of the reference. The foreign key constraint limits the value range of a column. One example is to restrict the abbreviation of a state name in a finite value set. This value set is another control

Oracle8i function index experiment ======================================== ================================== Author: oracle http://oracle.itpub.net) Posted: Category: General Category Source: http://oracle.itpub.net/post/20957/146498 --------------

Comparison of Oracle three collection data types (index table, nested table, and varray array)-PLSQL-3 PL/SQL does not use arrays. Its set data types are similar to those of arrays. In versions earlier than 7.3, there was only one set, called PL/SQL

264. empty_ B | clob () Returns an empty lob locator, which is used to initialize the lob variable or to insert or update declarations. Initialize the lob column or set its attribute to null. Insert into Table1 values (empty_blob ()); Update Table1

How to Use udev for Oracle ASM in Oracle Linux 6 Original article: http://www.dbform.com/html/2011/1708.html Most of the documents available on the Internet are set up with udev in rhel5 or oel5. udev is most useful for Linux to prevent the disk

Document directory Nvl Decode Function Decode is an exclusive function provided by Oracle. It is a powerful function. Although it is not an SQLStandard, but very useful for performance. Up to now, other database vendors have not yet provided

1. Check the database status. The status is normal. [Oracle @ racdb01 RAC] $ crs_stat-TName type target State host------------------------------------------------------------Ora. RAC. DB application online racdb01Ora... s1.inst application online

When developing Oracle Forms, do I have such a requirement? I need to execute an operation every time I leave a row of records. When when-validate-record is used, but in actual testing, how can this problem be solved sometimes? Have you tried

-- ======================================== -- Set the Oracle listener password (listener) -- ======================================== Are listeners secure? Sure! By default, any user can use the LSNRCTL tool to operate or disable Oracle listener

You can use spotlight software to monitor the running status of the database. When a session lock occurs, we need to handle it in time. 1. view which session locks:SQL statement: Select 'alter system kill session ''' | Sid | ',' | serial # | ''';

If you do not know the system in Oracle, you can use the following methods to retrieve the password of SYS: First, an ordinary user is added to the database:Run the following command in SQL * Plus:SQL> connect/As sysdba (you can also connect in the

I. Glossary (1) SGA: System Global Area is a basic component of Oracle Instance, which is allocated when the Instance is started. The System fully-local SGA consists of three parts: the Shared Pool, data buffer, and log buffer.(2) Shared Pool:

Basic syntax and example:1. EXP:There are three main methods (complete, user, table)1. Complete:Exp system/manager buffer = 64000 FILE = C: \ FULL. dmp full = YTo perform full export, you must have special permissions.2. User Mode:Exp sonic/sonic