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- How to convert rows to columns in Oracle
- In Oracle database, row conversion is a common data processing requirement. It converts multiple values in a row into multiple values in a column for better presentation and analysis of data. For example, let's say we have the following table: | ID | Name | Score1 | Score2 | Score3 || --- | --- | --- | --- | --- || 1 | John | 80 | 70 | 90 || 2 | Lily | 90 | 8
- Oracle 22230 2023-04-18 09:44:26
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- How to install oracle command line
- Oracle is one of the most popular relational databases. It is widely used in enterprise-level applications and web applications. In this article, we will learn how to install Oracle database on command line interface. The files you need to download to download the Oracle database installation package are provided on the Oracle official website. You can directly download the corresponding version of the Oracle code installation package. It is recommended to choose to install the latest version. Each version has a corresponding download link. Here are some download links: Oracle 18c (Linux x86-64
- Oracle 723 2023-04-18 09:44:04
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- What to do if c oracle garbled code
- c The solution to the oracle garbled problem often involves the Oracle database when developing databases. However, when using Oracle database, we sometimes encounter some problems. For example, when we read data from the Oracle database, garbled characters may appear, which brings great trouble to our development work. In this article, we will discuss the problem of c oracle garbled characters and provide corresponding solutions so that we can better solve this problem. The reason for garbled characters is in c language, using OCI
- Oracle 822 2023-04-18 09:43:38
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- How to solve Chinese garbled characters in Linux oracle
- When Linux systems and Oracle databases are run in a Chinese environment, Chinese garbled characters sometimes appear. This situation is very troublesome, because Chinese garbled characters not only affect the viewing of data, but also affect the storage and operation of data. This article will introduce how to solve the problem of Chinese garbled characters in Linux systems and Oracle databases. 1. Handling Chinese garbled characters in Linux system The configuration of the Chinese environment of the Linux system is very important to solve the problem of Chinese garbled characters. First, you need to confirm whether the Chinese fonts are installed on the Linux system. Use the command `fc-lis
- Oracle 2627 2023-04-18 09:43:19
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- How to delete service in oracle
- Oracle database is a powerful relational database management system, but it sometimes needs to delete services. Services may be deleted because some services are no longer needed or to free up system resources. This article will introduce how to delete services in Oracle database. 1. Prerequisites for deleting the Oracle database service. Before deleting the Oracle database service, you must ensure that all processes related to the service have been closed. If there are still processes using the service, it will be difficult to delete the service. Therefore, the best way is to delete the server
- Oracle 1343 2023-04-18 09:42:15
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- How to delete data files in oracle
- Oracle Delete Data Files Oracle database is one of the first choices for enterprise-level applications. It provides high-speed data processing capabilities and data security, which makes it the database system of choice for many enterprises. But in some cases, the administrator may need to delete certain data files in the database. There are some things to note when deleting data files in an Oracle database, and you must operate with caution, otherwise data loss or damage may result. This article will take you step by step on how to most safely delete Oracle data files. 1. prepare
- Oracle 3411 2023-04-18 09:41:46
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- How to call oracle stored procedure
- An Oracle stored procedure is a precompiled block of PL/SQL code that contains a set of SQL statements to be executed. Stored procedures can be used to process or manipulate data in a database, or they can be used to implement business logic or application functions. In Oracle database, stored procedure calls can be implemented in the following ways. 1. Use SQL command line tools. Using SQL command line tools (such as SQL*Plus), you can call stored procedures through the CALL statement. The syntax format of the CALL statement is:```SQLC
- Oracle 6528 2023-04-18 09:41:52
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- How does Oracle determine whether it is a string?
- Oracle is a widely used relational database management system that can process and store various data types. In Oracle, it is very common and important to determine whether strings and other data types are consistent. This article will introduce how Oracle determines whether it is a string. 1. Use the IS STRING function Oracle provides an IS STRING function to determine whether a value is a string. This function returns 1 (TRUE) or 0 (FALSE). The syntax is as follows: SELECT IS_STRI
- Oracle 1515 2023-04-18 09:41:09
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- How to set the time for Oracle connection
- In today's digital age, businesses need more efficient data management and processing, which is why a database management system (DBMS) is so important. Oracle is one of the most used and reliable database management systems out there. However, just like any other software, you may encounter some problems and challenges when using it. One of the common problems is Oracle connection time. This article will explore how to set connection time in Oracle. The connection time is a preset time period used to control how long the connection is not used.
- Oracle 2407 2023-04-18 09:40:58
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- How to set up sga in oracle
- Oracle database is a relational database management system widely used in the industry, and its performance and reliability have been widely recognized. However, in order for the Oracle database to perform better, a series of configurations and optimizations are required, one of which is setting up the SGA (System Global Area). SGA is the memory area used by Oracle database. It contains a variety of different memory components, such as Buffer Cache, Shared Pool, Java Pool, etc.
- Oracle 1365 2023-04-18 09:40:09
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- How to optimize oracle
- Oracle database is currently the most widely used relational database management system in the world and occupies a very important position in enterprise-level applications. However, as the amount of applications and data continues to grow, the unsatisfactory performance of Oracle database has become a dilemma faced by many enterprises. To solve this problem, optimizing database performance becomes increasingly important. This article will introduce some common Oracle optimization techniques to help DBAs optimize database performance to meet business needs. 1. Reasonable physical design Physical design of Oracle database
- Oracle 1554 2023-04-18 09:39:40
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- How to query big data in oracle
- With the advent of the Internet era, the amount of data has increased exponentially. For enterprises, how to efficiently process and analyze these big data has become an important task. As one of the relational databases with the highest market share, Oracle database's ability to support big data queries has become one of the important reasons why many companies choose Oracle. So, how does Oracle database perform big data queries? This article will introduce in detail three aspects of Oracle partitioning, indexing and analysis functions. 1. When the amount of data in Oracle partition reaches
- Oracle 1679 2023-04-18 09:39:48
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- How to install oracle
- Oracle is one of the most popular relational database management systems in the world. Its wide application in data management and processing in enterprises and institutions gives Oracle an important position and role in the IT field. In this article, we will introduce the installation steps of Oracle database in detail to help you build a complete Oracle environment on your computer. Please note that in this tutorial we will be using Oracle version 12.2 and demonstrating on Windows 10 operating system. If you are using a different version or operation
- Oracle 8098 2023-04-18 09:38:52
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- How to query row data in oracle
- Oracle is a powerful relational database management system that is widely used in various fields. When using Oracle for data query, you often need to query one or more rows of data. This article will introduce how to use Oracle query statements to query row data. First, we need to understand the most basic query statement in Oracle, the SELECT statement. The SELECT statement can obtain data from one or more tables, and you can select the columns to query and which table to query the data from. The structure of a basic SELECT statement is as follows: SELE
- Oracle 1359 2023-04-18 09:38:27
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- How to set up oracle encoding
- Oracle is a widely used relational database management system, and its encoding settings have an important impact on the storage, processing, and transmission of data. This article will introduce and analyze Oracle coding settings to help readers better understand and apply Oracle database. 1. Character set and encoding Before introducing Oracle encoding settings, we need to first understand the concepts of character set and encoding. A character set is a collection of characters that describes all the characters used in a language system. Encoding is the mapping of each character in the character set into something that the computer can process
- Oracle 1888 2023-04-18 09:38:03
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