Oracle

Recently, I began to learn about Oracle and expressed silence for the redo system caused by various problems during the installation process. (1) Question 1: After the 64-bit operating system is installed, select the java.exe file. Sqldeveloper

Oracle environment variable settings in window server 1. Right-click my computer and choose Properties> advanced> environment variable"2. Select "Path" and click "edit". Add a semicolon ":" to the end of the variable value text box of "Path". then

There are two types of Incremental Backup in RMAN: Differential Mode and Cumulative mode. The backup level is divided into 0, 1, 2, 3, and 4, and the Level 0 is the highest. Differential backup Differential (for superior-level or even level-level

As a skilled. Net coders and unskilled Oracle users, Oracle always gives me the feeling that this product is disgusting. Although I have to admit that Oracle is a very good (an) Good (gui) product, it is always so disgusting. For example, the

Conversion of rows and columns, two methods for the same effect Select t5. name, sum (t5.HTML) as HTML, sum (t5.JSP) as JSP, sum (t5. SQL) asSQL, sum (t5.Java) asJava, sum (t5. total) as total score, sum (t5. average score) as average score, sum

Today after configuring the Shared Server Mode found that the login process error ORA-12523, after troubleshooting found that static listening caused by the fault. There are two listeners on the local machine, one is static listening port 1521, and

683. Your production database it f unctional on the SHOST1 host. Y ou are backing up the production Database by using Recovery Manager (RMAN) with the recovery catalog. You want to replicate Production database to anther host, SHOST2, for testing

Optimize Oracle SQL using oracle EM Enterprise Manager (automatically generate indexes) # There are a large number of SQL statements in the Application Scenario project, especially when statistical reports are involved, there are many table

This section describes some precautions for online Oracle table space transfer. Examples are provided.Principle Analysis Use copy data file + import metadata to migrate data Table space can be transferred across platforms COLUMNPLATFORM_NAME FORMAT

I started my internship. I have been setting up the environment from Monday to Wednesday, and set up Redhat Linux 6.4 + Oracle 10 Gb under VMware. I am desperate to solve all kinds of problems... 1. The most common problem is the lack of Packages.

Why Does oracle not use indexes? Today is. Let's summarize the reasons why oracle does not use indexes. Take notes while learning. First, the number of rows varies. There is a num_rows field in the view user_tables. This field records the number of

Before installation, let me talk about the configuration of my computer: OS: Windows 7 32bit CPU: 3 GHz Memory: 2 GB Desk: 320 GB ========================================================== ========== Next, let's take installing oracle 10 Gb as an

Today, seven Chinese characters are inserted into the VACHAR2 (20) field of a table in ORACLE. The error message is displayed: The inserted value is too large. You can insert six Chinese characters. For a long time, a Chinese character occupies

In the previous chapter, we used the common method to configure the client. Is there a green version of the client? The official Oracle answer is: Instant Client. First, go to the homepage of this product and select the Windows 32-bit

SQL> show userUSER is "ZHONGWC"SQL>SQL> select * from v $ version;BANNER----------------------------------------------------------------Oracle Database 10g Enterprise Edition Release 10.2.0.5.0-64biPL/SQL Release 10.2.0.5.0-ProductionCORE 10.2.0.5.0

During full-text ORACLE search, the updated fields cannot be retrieved. Prerequisites: 1. This field is of the CLOB type. 2. the keyword used for retrieval is CONTAINS. The SQL statement is as follows: Select * from tableAwhereCONTAINS

Recently, we tried to upgrade our company's DataWit Business Intelligence System ETL tool to test the support capability for Oracle Database 12c. Therefore, we need to establish a test environment. I remotely install the Oracle DB 12c database to a

I. background There are two sid: Asid and Bsid. There are two users Auser1 and Auser2 under Asid, and there is a user Buser1 under Bsid. Among them, Auser2 and Buser1 establish dblink. You want to log on to Buser1 to access three tables table1,

Preface DECODE () function, which compares the input value with the parameter list in the function and returns a corresponding value based on the input value. The parameter list of a function is a sequence of several numbers and their corresponding

In 11g, oracle introduced a new feature: adaptive cursor sharing. This feature is mainly used to improve the execution plan of SQL statements with variable binding. It also causes SQL statements with variable binding to generate multiple cursors. In