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Oracle First chapter: Log Management 1.forcing Log Switches sql> alter system switch logfile; 2.forcing checkpoints Sql> alter system checkpoint; 3.adding Online Redo Log groups sql> ALTER DATABASE Add logfile [Group 4] Sql> ('/disk3/log4a.rdo ',

Using bbed not only retrieves data that has been delete, but also restores the update data, which is more complicated than restoring the delete data. The experimental process is as follows: Sys@orcl>create table Bbed_test (x int,y varchar2 (20));

Start from a problem Recently, the bank of this matter more serious ah, many depositors of the money in the bank, it disappeared, and the bank does not ask, said the user's responsibility, litigation, users can also lose, this is "socialism." Let's

asp.net| Transaction Processing Three kinds of transaction processingTransaction processing is often encountered in the processing of problems, often used methods have the following 3 kinds of summary collation as follows:Method 1: Write directly to

DBMS_STREAMS_ADM provides three procedures for creating a table space-level replication environment: Maintain_simple_tts: Replication of a single table space Maintain_tts: Replication of multiple table spaces Pre_instantiation_setup and

Oracle First week: Flash back query Get a movie instead of a picture: Flash back version query No setting required to immediately recognize all changes to a row In the Oracle9i Database, we saw that it introduced a "time Machine" in the form of

Server|sqlserver first, starting from the error in SQL Server, there are some strange error-handling errors at the same level as 16 but the results are different. SELECT * from an absent table if @ @error print ' This has no output ' Go

Many database operations on the web require transactions, and there are roughly 3 levels of transactions under ASP.net: (1) Transaction at the level of the stored procedure (2) Ado.net-level transactions (3) asp.net transaction at the page

The following code has been tested to run directly Oracle analysis functions, multidimensional functions and model functions are briefly described, mainly for the BI report statistics, not necessarily very comprehensive, but a little explanation of

Blocking occurs when the first connection from the application controls the lock and the second connection requires a conflicting lock type. The result is to force the second connection to wait while blocking on the first connection. A connection

Skills Next:ASP Development 44 Skills Collection of the second 1. Several common functions Round (pi, 2) roundedFormatNumber (k,4) ' formats K as a number with four-bit decimal points.eg. If K =20000 is shown as 20,000.00 if FormatNumber (k,0) is 20,

In the morning to the office to listen to colleagues said the table was locked, a try, found that a table in a field of 1111111 of the row are locked, select None. Report Error ORA-01591, open toad knowledge EXpert, described very little, just say

Whether you need to rebuild the index regularly is a topic that DBAs have been arguing about, never stopping. Summarize the views of the parties ---5.1 Reasons to support rebuilding indexes 1 Oracle's B-tree index becomes unbalanced over time Many

Join order in the 1.WHERE clause: Oracle parses the WHERE clause in a bottom-up order, according to which the connection between the tables must be written before the other where conditions, and the conditions that can filter out the maximum number

Resolution | control | Issues on the Forum see the question http://community.csdn.net/Expert/topic/3772/3772658.xml?temp= the CustomValidator control verifies that the control value is empty. 9461634, just as I have encountered, the solution is not

Platform: Windows SP3 server Database: Oracle 9.0.1.1.1 Site Description: Users complain that not multiple units at the same time data processing, the implementation of the error message is: sql> exec sp_hyb_da_ryxx_dwbh_test (' 331028 ') BEGIN

Submitting a Form | Submitting a Form In order for the ASP to minimize server-side workloads, you should use JavaScript more, and submit all submitted fields to the server using JavaScript or VBScript, so that the server does not have to be tested,

A friend mentioned a data pump import problem, in the presence of a table, do not delete the table, and import the table's data and indexes. In fact, this task is very simple for imp, because IMP works in this way. sql> CREATE TABLE T_exp 2 (ID

Creates a transactional object on a database connection, and then invokes a transaction object to commit the transaction or rollback the transaction. Simple code: PRivate void Button1_Click (object sender, System.EventArgs e) { SqlConnection conn

There are two ways to perform SQLite database transactions in C #: SQL code and C # code 1.SQL Code: BEGIN ... COMMIT /rollback 2.c# Code: using (Sqliteconnection conn = Sqlitehelper.getsqliteconnection ()) {