Oracle

1 Select 2 * 3 from4 (5 Select6A.*, RowNum r_n7 from 8 a_test A9 ) TTTen where OneTt.r_ninch A ( - Select - min(rownum) the from - a_test T - Group byname//name for the

There is a feature in the project that needs to get data from an Oracle database, which was thought to be very simple, and changed the original SqlClient into a OracleClient call.The result is far less simple than you think. There are a lot of needs

This article mainly describes the Rman recovery scheme and Oracle Machine recovery, the need for friends can refer to the followingNote:The premise of ① recovery is that it is ready for backup② Full Recovery database is a database that is

Log of WLS:/tip/imp/bea/user_projects/domains/idmdomain/servers/adminserver/logsLog of OID:/tip/imp/bea/user_projects/domains/idmdomain/servers/wls_ods1/logs10g related log:How to Backup (i.e, Rotate) Oid/sso 10g Logs without stopping Server

After loading the ooracle 11g client sqlplus copy and paste the time is not too simple,used the old version of the lab 10g client.The premise service side is loaded, want to change a client. 11g SQL Plus can also be used.File Links:Link:

Basic steps for Oracle to invoke Java classes1. Write Java code that can be used directly in Java code, class file or Jar package2. There are two ways to import well-written Java code into an Oracle database: One is to use the Loadjava command, and

This time I'm going to write it down!November 4, the first exam, the content of the exam is about the MySQL query command, the test of a morning, took the question to a face, not kidding, I thought the problem will be very simple! The result is I

--Sometimes you need to submit a job script that someone else wrote, you can use the following storage to output all the job code in the command window mode;SetServeroutput onSize1000000;Create or Replace procedureProc_generate_job_create_sql is

The SQL Access Advisor makes suggestions about indexes and materialized views which might improve system performance. This article describes how to use the SQL Access Advisor in Oracle 10g. Enterprise Manager Dbms_advisor Quick Tune

One, no return value of the stored procedureAncient cloud: Make haste, in order to let the big guy easier to accept the paging process to write, I still from simple to complex, gradually to everyone to explain. The first is to master the simplest

In an Oracle database, you can merge fields using the wm_concat (column) functionThe Oracle Wm_concat (column) function allows us to use it frequently, and below teaches you how to use the Oracle Wm_concat (column) function to implement a field

SOURCE end: 12C RAC primay backup fileTarget side: 12C Single InstancePartial Summary:1 Pfile Modification2 Disable Redo Thread N3 Drop logfile Group N4 Rename LogFile5 Cancel Log Remote transferIf primary is in Maximum availablity mode, the control

In an Oracle database, the purpose of a sequence is to generate a table's primary key value, to be referenced in an INSERT statement, to check the current value through a query, or to increment the sequence to the next value. In this article we

Database Home > RELATED LINKS links) area > Alert log content (Alert logs contents)View Alert logsEach database has a alert_.log file. This file is located in the same server as the databaseIf $oracle_base is set, this file is stored by default in

Http://www.linuxidc.com/Linux/2014-05/101108p2.htmOracle Database VaultOverviewFor information systems, security is a critical consideration. In recent years, the global outbreak of information data leakage caused by the widespread concern, no data

First, materialized view overviewThe materialized view of Oracle is a database pair image that includes a query result, which is a local copy of the remote data, or is used to generate a summary table based on the sum of the data tables.

/*Oracle materialized View*//*Why use materialized views?Materialized views are widely used as a means of SQL tuning in a data warehouse environment.A large number of long query statements, poor processing, will cause serious I/O problems.*//*What

Really is too easy, once in Window Server 2003 built a set of Asp+oracle interface System. It cost a great effort, in fact that will be fascinated gaze stare also don't know how to fix, also lazy tube. OK, from yesterday to today to deploy the

This document describes two things, one is the substitution variable, the other is to understand the hard parsing and soft parse for the variable declare definition of good or variable defined in the oracle , for a committed SQL statement, there are

In-depth analysis of the nvl function of Orcale and the isnull function of SQL Server, orcalenvl Nvl function of Orcal NVL (Expr1, Expr2) If Expr1 is NULL, the value of Expr2 is returned. Otherwise, the value of Expr1 is returned. If both Expr1