Oracle

On August 15, October 19, Beijing time, according to foreign media reports, MySQL database founder Michael widenius said on Monday that on the acquisition of Sun Microsystems, oracle should promise to sell sun's open-source database MySQL to address

We are introducingOracleIf there is a null value in the given value,OracleThese null values are ignored. This processing method most of the time meets our requirements, but sometimes there may be problems. For example, when the year ends, the

Practical Technology of Oracle11g -- how to obtain rowId when inserting data into an Oracle databaseOracle11g has many new features, I believe you have learned from many channels (Note: still not clear please visit

After a long period of learning to create Oracle tablespaces, I would like to share with you that you will certainly have a lot of gains after reading this article. I hope this article will teach you more things. 1. First query free space Copy

The ORACLE tutorial is: Analysis and Solution 2 of common ORACLE error codes. -------------------------------------------------------------------------------- P align = "JUSTIFY"> ORA-01578: Oracle data block upted (file # num, block # num) Cause:

The ORACLE tutorial is on Oracle data security. Oracle Data SecurityAuthor: Author★With the popularization of computers and the development of the network, the sl god of war database is no longer just the proprietary topic of those programmers.

[Oracle] jobs for beginners: a job is an oracle object. It can be understood as a program for scheduled execution. Objective: To automatically execute specific code at regular intervals-create a job 1. create the test table JOB_TEST [SQL] create

SQL CREATE VIEW statementWhat is a view?In SQL, a view is a visualized table based on the SQL statement result set. A view contains rows and columns, just like a real table. A field in a view is a field from a real table in one or more database

The value of distinct is displayed only once. No matter how many times this value appears, it is only displayed once. Select distinct field name 1, field name 2 from Table order by field name 1 It is best to use it in combination with order.

Today, let's take a look at how convenient it is to use the batch processing command to back up a table during database backup in oracle 10 Gb. Today, let's take a look at how convenient it is to use the batch processing command to back up a table

Problem description: the customer reports that the client cannot connect when it cannot log on to the application.Environment: AIX 5.3 + Oracle 11gR2Solution: remote Telnet to the Database Host, sqlplus/as sysdba after the connection operation is

After successfully installing the Oracle 11g Database, you will find that your computer runs slowly, and your computer with low configuration may even experience very bad conditions, by disabling non-essential Oracle services, you can speed up your

Directory I. The sybase12.5 for NT Version is installed on the win2000 platform. garbled Chinese characters are displayed on the interface. 2. sybase cannot be installed after the network is shared or copied to the local hard disk Iii. Unable to

Before installation, We need to download the corresponding version. Click: Oracle 10 Gb support for Win7 Error: Checking operating system requirements...Results: 5.0, 5.1, 5.2, 6.0Actual result: 6.1Check complete. The overall result of this check is:

1: create a user Copy codeThe Code is as follows:Create temporary tablespace user_tempTempfile 'd: \ app \ topwqp \ oradata \ orcl \ user_temp.dbf'Size 500 mAutoextend onNext 50 m maxsize 2048 mExtent management local;Create tablespace

ADF is a set of enterprise development solutions provided by oracle.For a recent performance test, you need to obtain the number of SQL queries on the current page and the amount of time it takes. The first thing that comes to mind is that the

Serveroutput is the configuration parameter of sqlplus, not the configuration parameter of the database. Modify and save the Configuration Parameter of sqlplus, so you do not need to reset it every time you open sqlplus.The setting method is as

Insert into Table (TestCol) VALUES ('')The TestCol field has been designed as not null during design, but we need to know that in SQL server, null and space are different, that is, the preceding statement inserts an empty field, but is not NULL. It

Select substr (T. RPT_ID,INSTR (T. RPT_ID, ',', 1, C. LV) + 1,INSTR (T. RPT_ID, ',', 1, C. LV + 1)-(INSTR (T. RPT_ID, ',', 1, C. LV) + 1 ))AS RPT_IDFROM (SELECT ',' | '85, '|', 'rpt_id,LENGTH ('85, 86,87 '|', ')-NVL (LENGTH (REPLACE ('85, 86',', '),

ABS (x) function, which is used to return the absolute value of a number.ACOS (x) function returns the arc cosine of X. X ranges from 1 to-1, and the input value ranges from 0 to pie, in radians.The ASIN (x) function returns the arc sine of X. X