Oracle

Today on the machine installed Oracle 10g, after the installation is complete error prompt "ORA-00988: Password missing or invalid", then can not enter the console for corresponding operations and management, I have not encountered this error before

Step 1: Open the context. xml file in the Apache Tomcat 6.0.35 \ conf directory and configure it under the context node as follows: Name = "JDBC/connection pool name"Type = "javax. SQL. datasource"Driverclassname = "oracle. JDBC. Driver.

ArticleDirectory   New Features Database architecture On July 6, June 26, 2013, Oracle Database 12C was officially released. The first version was 12.1.0.1.0. The first download platforms were Linux and Solaris: Oracle

When writing SQL statements, fields in a column are often merged. For example, the monthly salary of a person is listed, but each person can only take one row. In such scenarios, you may also use row-column conversion. However, if the information

A very powerful function in Oracle is to convert functions written in Java into functions in the Oracle database. After the conversion, we can use it as a general function.Because oracle is developed in Java itself, it is naturally compatible with

We know that most of the popularProgramming LanguageAll are object-oriented. all objects in object orientation are objects. that is to say, each class. this idea is also used in Oracle Data. most of the time, when creating a table, we specify that

I was very happy to participate in the activity for the first time. I couldn't wait to read it twice after I got my book. Because I used MySQL, I learned Oracle again this time and asked me some questions. Thanks to csdn for holding this activity!

  I learned about Oracle's VPD technology a few weeks ago and did some tests on the EBS system. Summary: some content is taken from the network. There are many methods to solve the permission problem in the solution of database data security access.

  Import inventory item The main purpose of material import/export is to import/export data between different systems, and to obtain data in a certain data information format and a certain transmission mode. The most important problem that must be

  Alert is a mechanism in the Oracle system. It can monitor the system database and send a notification to the specified user as required. The notification can be in the form of email or other notifications, both the labeled System and the custom

Today, we found that the SELECT statement in Oracle can implement recursive queries using the start with... connect by prior clause. The connect by clause is used in structured queries. Its basic syntax is: Select... from tablename start with

Oracle temporary tablespace is mainly used to query and store some buffer data. Temporary tablespace consumption is mainly caused by sorting the intermediate query results. Restarting the database can release temporary tablespace. If the instance

During the ETL process, the last or most previous record of the result set is often encountered. For example, the current interest rate, account opening amount, and agreed interest rate of current demand deposits. If you do not need the lookup

To learn about Oracle, we 'd better first understand the Oracle framework. In this way, we have an overall understanding of Oracle, which has the role of creating a high-level architecture. 1. Physical Structure (Composed of control files, data

Document directory 1. Start with can be omitted 2. The start with and connect by prior locations are interchangeable. 3. nocycle keyword 4. Change the conditional order after connect by prior (???) 5. You can also add the where condition.

Document directory Example 2: In Oracle, a keyword is null, indicating that a value is unknown and uncertain. Since it is unknown, there are several possibilities. Therefore, null is not a definite value. Let's take a look at two

---- Create test table create table student_score (name varchar2 (20), subject varchar2 (20), score number (); ----- insert test data insert into student_score (name, subject, score) values ('zhang san', 'China', 78); insert into student_score (name,

1. Usage of select... connect by prior... start: Select... from Where -- filter condition, used to filter all returned records Start with -- conditions for starting the root node of the query result Connect by prior -- connection Condition   The

Database features that developers are concerned about As a developer rather than a DBA, we certainly have different focuses on databases. we do not need to know backup, configuration, optimization, and database maintenance. we are concerned about

When I encountered this problem when I was working on JSP to implement an online transaction platform, I think this problem must be representative, because the paging display technology is actually used in many places. In order to reduce the time