Oracle

Today, colleagues, there is a database connection failure problem, together Baidu a bit, the results finally solved, the following is a number of popular knowledge reproduced.1, Query database name: Select Name,dbid from v$database; or command line:

The following error occurs when inserting, updating, deleting data from a table, or adding a table's primary key or index to a database user:Ora-00054:resource busy and acquire with NOWAIT specified or timeout expiredThis is because a transaction is

I. The concept of transactions in OracleIn Oracle, all modifications to the table are in one transaction (the transaction is like a buffer of memory)Statement that commits the transactioncommit;Discard TransactionsRollback;Principles:All

Declarel_result BOOLEAN; Beginl_result: = dbms_pdb.check_plug_compatibility (pdb_descr_file = '/u02/pdb/pdb3.xml ', pdb_name = ' pdb3 '); F L_result Thendbms_output. Put_Line (' compatible '); Elsedbms_output. Put_Line (' incompatible '); END IF;

SQL ServerThere are many data about paging SQL, some use stored procedures, and some use cursors. I do not like the use of cursors, I think it cost, inefficient; Using stored procedures is a good choice because stored procedures are precompiled,

Before giving you a detailed introduction to Oracle Hints, let us know what Oracle Hints is and then fully introduce Oracle Hints, which we hope will be useful to you. The cost-based optimizer is smart, and in most cases it chooses the right

#! /bin/bashecho "######## #oracle9R204 a simple installation script ##############################"## Add Oracle Users and user groups to the system#Groupadd dbaGroupadd OinstallUseradd-c "Oracle software Owner"-G oinstall-g dba Oraclepasswd Oracle#

Oracle Import Export Command parsingIn this paper, the import and export of Oracle data IMP, exp Two commands are described, and its corresponding parameters are described, and then through some examples toDrills to deepen understanding.At the end

1. Framework.queryinfo info1 = new Framework.queryinfo ();String Sql = Holworth.Utility.Utility.EntityRowMapper.getSql ("//data//valueatriskcalculationservice//nonequery2 ");Info. Customsql = SQL;Info1. Namedquery = "P_tran_simulation1";Info1.

Oracle queries the most recently executed SQL statement (2014-06-09 18:02:43) reproduced Category: Database Oracle queries recently executed SQL statements select Sql_text,last_load_time from V$sql order by

Oracle9i Database introduces a new feature called Fine-grained auditing (FGA). Now the following is the use of FGA to achieve audit of the table audit. Where EDMs is a test account for the database.1. Create a test table (under User

1. Run Sqlplus toolC:\users\wd-pc>sqlplus2. Go directly to the Sqlplus command promptC:\users\wd-pc>sqlplus/nolog3. Connect as OS IdentityC:\users\wd-pc>sqlplus/as SYSDBA orSql>connect/as SYSDBA4, Normal User loginC:\users\wd-pc>sqlplus scott/123456

The Oracle client is installed on the Server1, and Plsql is installed, but after logging in, the database and connect as are not displayed.Manually enter the correct user name and database after the error is as followsSo just cancel the login and go

oracle11g download page:http://www. Oracle.com/technetwork/database/enterprise-edition/downloads/index.html, find the right database for your system, you need to download file1 and File2, Compressed to the same folder for installation, otherwise it

Http://www.oracle.com/technetwork/cn/database/features/instant-client/index-092699-zhs.htmlDownload the corresponding Instant Client package on the official website and solution to C: \.Run the following batch.REG ADD

11. Query the number of connections to Oracle2select Count (*) from v$session;32. Querying the number of concurrent connections for Oracle4select Count (*) from v$session where status= ' ACTIVE ';53. View the number of connections for different

Oracle Database 11g Release 2 installation on CentOS 6.6 (x64 platform)(note:the Current user is "tdtc100")1. Down Install files(1) Linux.x64_11gR2_database_1of2.zip(2) Linux.x64_11gR2_database_2of2.zip2. Unzip files(1) $> unzip

Oracle Database cursor case description and source code 1. cursor ConceptCursor is a data buffer provided by the system for users to store the execution results of SQL statements. Each cursor area has a name. You can use SQL statements to obtain

Partition Table: range partition, list partition, hash Partition(1) A partition table contains multiple partitions. Each partition is on an independent segment and can store different tablespaces;-- (1.1) officially recommends tables larger than 2

To completely uninstall oracle11gTo completely uninstall oracle11g:1. Choose "start"> "Settings"> "Control Panel"> "Administrative Tools"> "services" to stop all Oracle services.2. Start-> Program-> Oracle-OraHome81-> Oracle Installation Products->