Oracle

Run the DBV command to check whether the data file contains bad blocks before recovery.DBV file = D: \ oracle \ oradata \ mydb \ ronly. DBF blocksize = 8192You can view the data file number and block number of the bad data block to perform a full

Today through toad Oracle database operations, encountered a strange exception information ora-00054: Resource busy and acquire with Nowait specified (resources are busy, need to specify Nowait), search for a long time, finally, find the

Oracle commonly used SQL statement Daquan http://lww200661.blog.163.com/blog/static/314615122009414101316698/SQL language wildcardIn the SELECT statement, add the WHERE clause. In the WHERE clause, comparison operators are used to constitute the

-- 1. obtain information about the tablespace to be released (including the tablespace owned by Oracle database)-- Drop table system. tbs_detail; Create Table System. tbs_detail as select A. tablespace_name, A. Bytes/1024/1024 "sum_mb ", (A. bytes-b.

(I) Partition Table technology Overview (1) range partitioning ① Example Create Table t (... Column definition ...) Partition by range (week_num) (Partition P1 values less than (4) tablespace data0, Partition P2 values less than (5) tablespace

The following lists common data dictionaries and dynamic performance views:I. DBA's most common data dictionary Dba_data_files: Used to query information about database files.Dba_db_links: includes all database links in the database, that is,

Some time ago, this article was put on hold due to lack of Internet access. We will take the noon time to fix it today.Oracle data provider for. Net has two namespaces: Oracle. dataaccess. Client and Oracle. dataaccess. types. Oracle. dataaccess.

What should I know first as an Oracle DBA in a completely new environment?Here, we will not talk about those major aspects, such as understanding the overall situation of the entire IT environment. If you already know this, you need to face these

Java calls the Oracle function to return the result set Time:2010-08-27 10:19:50 Source:Network Author:Unknown Click:Create or replace package my_steel_soft 208 times As -- Type of the dataset returned by the Stored Procedure Type returndataset is

Oracle9i introduces the merge command. You can execute the inserts and updates operations on a table in an SQL statement at the same time. the merge command selects rows from one or more data sources to update or inserting to one or more tables. In

Improve query efficiency with Oracle function index anonymous Internet I want to comment (0) font size: T| T To improve the efficiency of Oracle Database Query and retrieval, using function indexes is undoubtedly a very good method. The usage of

Source: http://blog.csdn.net/wh62592855/archive/2009/11/16/4817920.aspx Rollup is an extension of the Group by clause. It can return subtotal records for each group and total records for all groups. Cube is an extension of the Group by clause. It

Http://blog.sina.com.cn/s/blog_7c855cf70100shrv.html Oracle 11g and EM cannot be started. It may be because the IP address has changed. So I used the emca command to reconfigure Oracle em. The specific process is as follows:I: \ Documents ents and

Recently, I have been working on a statistical page optimization job, and the project is nearing completion. So I will share some of the optimization experiences with you. First, let's introduce the environment of this project. As this is an old

Oracle table partition and index partition Summary To simplify the management of large tables in the database, for example, data warehouses are generally measured in terabytes. partition options are introduced after oracle8. partitions are separated

1. DDL and DML /** // *** DDL ***/ Begin Execute immediate 'drop table temp_1 '; Execute immediate 'create table temp_1 (name varchar2 (8 ))'; End; /** // *** DML ***/DeclareV_1 varchar2 (8 );V_2 varchar2 (10 );Str varchar2 (50 );BeginV_1: =

Tools 1 and PowerDesigner 15 2. PDMReader Method 1. Open PowerDesigner 15 and create a Physical Database Model. 2. Set the Oracle server. Choose Database> Configure Connections> ODBC File Data Sources> Add Data Sources. in Create New Data Source,

Oracle OS authentication and password files 1. OS AuthenticationAfter oracle is installed, OS authentication is enabled by default. The OS authentication mentioned here refers to the server-side OS authentication. OS authentication means that the

Author: eygle | English Version [indicate the source and author information and this statement in hyperlink form during reprinting]Link: http://www.eygle.com/archives/2005/10/oracle_howto_use_decode_function.html The syntax structure of the Decode

By default, the database locks the user after 10 failed attempts; 1. view the FAILED_LOGIN_ATTEMPTS Value Select * from dba_profiles; 2. Change it to 30 alter profile default limit FAILED_LOGIN_ATTEMPTS 30; 3. Change it to an unlimited