Oracle

This is the data recovery case for a customer we've been working on recently, and the customer environment is windows,oracle version 9201. The database could not be opened because of a disk failure. After understanding, the customer in June on the

1, what is a REF CURSOR?A temporary object that dynamically associates a result set. That is, dynamically deciding to execute the query at run time.What is the effect of 2,ref cursors?Implements the ability to pass result sets between programs,

temporary table and temporary table classification A temporary table is the kind of introduction of a new table in Oracle 8i. A temporary table in an Oracle database is a special kind of table that can be used as a way of temporarily saving data. A

Oracle 11g Installation 1. Unzip the downloaded package, then enter the package, click Setup.exe to start the installation. 2. Appear as follows: generally put that small pair of hooks canceled, click Next, The next point ' yes ' 3. After

July 31, 2006, Oracle and Hewlett-Packard jointly announced that both sides have jointly developed a "reference match" to help it to accelerate the deployment of data warehouses based on HP server and storage platforms, Oracle (r) database 10g

Oracle second part, Oracle Architecture system [Q] Oracle has those data types [A] common types of data are Char fixed length character value field, maximum length up to 2000 bytes NCHAR a fixed-length character value field of a multibyte character

Oracle If you go to a computer bookstore now, you'll find that books related to Oracle technology will occupy a lot of space in bookstores. In these books there are many fine, but certainly some dross mixed with, for fine, we might as well read, for

Exception handling One (Exception table common type) New Exception Handling table CREATE TABLE Ogg.exception_log (Replicat_name varchar2 (10), TABLE_NAME VARCHAR2 (100), errno number, DBERRMSG varchar2 (4000), Optype VARCHAR2 (20), Errtype

Ii. Manual implementation of TSPITR Oracle supports creating its own helper instances for Tspitr. You can also use the manual tspitr to complete the failed automatic Tspitr operation. First, the steps listed in the previous preparation phase are

The Oracle 11g R2 DBA Operations Guide was the first book I learned about Oracle database knowledge, where I recorded my own learning notes, and I verified the knowledge points in the book by actual operation.1.Oracle Database Foundation 1.1.

1 withL as2(SELECT Level asLv fromDUAL CONNECT by Level 9 ),3M as (4 SELECTa.lv asLv_a,5b.lv asLv_b,6To_char (b.lv)|| 'x' ||To_char (a.lv)|| '=' ||7Rpad (To_char (a.lv*B.LV),2,' ') as TEXT8 froml A, l B9 WHEREb.lva.lv)Ten SELECTListagg (M.

Oracle-based application system many performance problems are caused by poor application SQL performance, so, SQL performance optimization is very important, analysis and optimization of SQL performance we generally look at the SQL implementation

Prospect:1. Install the x86_64 version of the CentOS 7 system (or the corresponding version of Red Hat, etc.) to the GNOME Desktop edition.2. Download and install and activate Xmanager Enterprise 5 for connection access to Linux systems, data

Database version:11.2.0.4.0Patch Requirements Environment:linux64(This version is the example here)Patch Considerations: You can scroll the upgrade. You need to close the node database and close the node's Cluster service and related processes.Patch

The recent project used to read and write to the Oracle large pieces, the small white is recorded here, convenient for their later use, but also hope to other friends have a little help.Because of the project, the BLOB here is only read and write to

First, the preparatory work1, database environmentOperating system version: Redhat 6.5 x64Database version: Oracle 11.2.0.4 x64Oracle database:11.2.0.42, Prepare contentOpatch:p6880880_112000_linux-x86-64.zipDB Psu:p21352635_112040_linux-x86-64.zip

First, row to column1.1. Initial test dataTable structure: Test_tb_gradeSQL code:1 CREATE TABLE Test_tb_grade2 (3 ID Number (TEN) is not NULL,4 user_name VARCHAR2 (CHAR),5 COURSE VARCHAR2 (CHAR),6 score FLOAT7)Initial data such as: 1.2, if you need

In -depth understanding of Oracle Tables (3): Three table connection methods nested loop Join and Sort merge JoinCategory: Oracle Foundation Management Oracle SQL Development2013-01-28 00:332536 People readComments (1) CollectionReport       offThe

1. View the database character set?The database server character Set select * from Nls_database_parameters, which is derived from props$, is the character set representing the database.The client character set environment, select * from Nls_instance_