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- Let's talk about how to execute sql statements in oracle
- Oracle is a software based on a relational database management system with the SQL language at its core. SQL is a standard language for working with relational databases. It can be used to query, insert, delete and update data. This article will introduce you to how Oracle executes SQL. 1. Open SQL*Plus. To execute SQL statements, you first need to open the SQL*Plus tool. SQL*Plus is an interactive command provided by Oracle that allows users to execute SQL statements.
- Oracle 3688 2023-03-31 17:31:46
- How to view table space in oracle
- How to check the table space in Oracle: 1. Check the name and size of the table space through the "SELECT t.tablespace_name, round(SUM(bytes / (1024 * 1024)), 0) ts_size..." command; 2. Check the name and size of the table space through the "SELECT tablespace_name, file_id, file_name, round(...)..." command to view the name and size of the physical file in the table space.
- Oracle 37482 2023-01-04 15:36:53
- How to deduplicate data in Oracle
- Deduplication method: 1. Use distinct keyword to deduplicate, syntax "SELECT DISTINCT field name FROM table name;"; 2. Use window function row_number () over() to deduplicate; 3. Use "group by" clause to deduplicate , the syntax is "select field name from table name group by field name;"; 4. Use rowid to deduplicate pseudo columns.
- Oracle 13462 2023-01-04 14:42:25
- Analysis and solutions to the reasons why Oracle scheduled task timing is invalid
- This article brings you relevant knowledge about Oracle. I found that the system data has not been updated. I checked the Oracle scheduled task and it is estimated that it has not been executed. The following introduces the analysis and solutions to the reasons why the Oracle scheduled task timing is invalid. I hope it will be helpful to everyone. .
- Oracle 3510 2022-09-14 17:54:49
- A brief introduction to Oracle table space management and user management
- This article brings you relevant knowledge about Oracle. It mainly talks about the introduction of Oracle table space management and user management. Table space is an important component of the logical deconstruction of Oracle database. Table space can store various application objects, such as tables , index, etc. If you are interested, please come and take a look. I hope it will be helpful to everyone.
- Oracle 2665 2022-09-08 17:49:31
- Summarize and organize knowledge points on creating users and table spaces in Oracle
- This article brings you relevant knowledge about Oracle. The Oracle database is commonly used in JAVAEE projects. As a background program developer, mastering how to create users and table spaces in Oracle is a necessary skill. The following This article introduces the relevant information about creating users and table spaces in Oracle. I hope it will be helpful to everyone.
- Oracle 1937 2022-09-07 14:13:29
- One article analyzing ORACLE tree structure query
- This article brings you relevant knowledge about Oracle. It mainly introduces the article about parsing ORACLE tree structure queries. The article expands on the topic in detail. Let’s take a look at it together. I hope it will be helpful to everyone.
- Oracle 2496 2022-09-05 17:48:24
- Summary of some common situations of Oracle query based on time
- This article brings you relevant knowledge about Oracle. Querying based on time is a function that we often encounter in daily development. The following introduces some common situations about Oracle querying based on time. The article introduces it through example code. For details, friends in need can refer to it.
- Oracle 2507 2022-09-02 20:55:27
- What is the difference between oracle database and sql
- The difference between Oracle database and SQL: 1. "SQL Server" can only run on Windows, while Oracle can run on all mainstream platforms; 2. "SQL Server" parallel implementation and coexistence model is not mature and has limited scalability. Oracle provides high availability and high scalability cluster solutions; 3. "SQL Server" is simple to operate and only has a graphical interface, while Oracle is more complex and provides both GUI and command line.
- Oracle 9506 2022-08-30 16:48:00
- Summarize and organize commonly used functions in Oracle
- This article brings you relevant knowledge about Oracle. It explains in detail the commonly used functions in Oracle and introduces them through sample codes. I hope it will be of certain reference value for everyone's study or work. I hope it will be helpful to everyone.
- Oracle 2493 2022-08-30 14:00:18
- Summarize and organize common methods for removing duplicate data from Oracle database
- This article brings you relevant knowledge about Oracle. It mainly introduces the duplicate data in the table that is often removed during data cleaning. So how to deal with it in Oracle? Let’s take a look at it together, I hope it will be helpful to everyone.
- Oracle 3259 2022-08-22 17:59:30
- Detailed graphic and text explanation of Oracle lock table solutions
- This article brings you relevant knowledge about Oracle. When developing Oracle database, we often encounter Oracle data tables that are frequently operated, and Oracle lock tables will appear. Here we introduce to you the relevant solutions to Oracle lock tables. Information, I hope it will be helpful to everyone.
- Oracle 3127 2022-08-17 20:27:48
- Detailed explanation of nvl() and nvl2() function examples in Oracle
- This article brings you relevant knowledge about Oracle. The function of the NVL function is to convert null values. It returns the response column name or expression based on whether the value of the first expression is null. Here is the article This article mainly introduces you to the relevant information about the nvl() and nvl2() functions in Oracle. I hope it will be helpful to you.
- Oracle 2521 2022-08-15 20:18:53
- How to modify pga in oracle
- In Oracle, you can use the "alter system set pga_aggregate_target=numeric value..." command to modify the size of pga; pga is the abbreviation of "Program Global Area", which is a program cache area and a memory area that contains service process data and control information. .
- Oracle 3300 2022-08-02 16:23:37
- How to use case in oracle
- In Oracle, the case statement is used to compare the expression result with several provided foreseeable results. If the comparison is successful, the corresponding statement sequence is executed. The syntax is "CASE expression WHEN expression result 1 THEN execution item [WHEN Expression result 2 THEN executable item]...".
- Oracle 7103 2022-08-02 16:15:56
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