OracleFaq (Oracle version)_PHP tutorial
If you need to reprint, please indicate the source, thank you! Taking 8.1.7.4.0 as an example: 8: Version number 1: New feature version number 7: Maintenance version number 4: Ordinary patch setting number 0: Special platform patch setting number. In addition, regarding the issue of Oracle being 32bit/64bit, The explanation is as follows: In Windows/Linux system, since the operating system is 32bit, Oracle must be 32bit; In tru64, Oracle must be 64bit; In hpux/aix/solaris, it depends on the specific situation. If it is 64bit, When sqlplus is started on the server, the words 64bit will be displayed. You can also view it by selecting * from v$version; or $ file $ORACLE_HOME/bin/oracle|more, such as:
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Hot Topics
How long will Oracle database logs be kept?
May 10, 2024 am 03:27 AM
The retention period of Oracle database logs depends on the log type and configuration, including: Redo logs: determined by the maximum size configured with the "LOG_ARCHIVE_DEST" parameter. Archived redo logs: Determined by the maximum size configured by the "DB_RECOVERY_FILE_DEST_SIZE" parameter. Online redo logs: not archived, lost when the database is restarted, and the retention period is consistent with the instance running time. Audit log: Configured by the "AUDIT_TRAIL" parameter, retained for 30 days by default.
The order of the oracle database startup steps is
May 10, 2024 am 01:48 AM
The Oracle database startup sequence is: 1. Check the preconditions; 2. Start the listener; 3. Start the database instance; 4. Wait for the database to open; 5. Connect to the database; 6. Verify the database status; 7. Enable the service (if necessary ); 8. Test the connection.
How to use interval in oracle
May 08, 2024 pm 07:54 PM
The INTERVAL data type in Oracle is used to represent time intervals. The syntax is INTERVAL <precision> <unit>. You can use addition, subtraction, multiplication and division operations to operate INTERVAL, which is suitable for scenarios such as storing time data and calculating date differences.
How to see the number of occurrences of a certain character in Oracle
May 09, 2024 pm 09:33 PM
To find the number of occurrences of a character in Oracle, perform the following steps: Get the total length of a string; Get the length of the substring in which a character occurs; Count the number of occurrences of a character by subtracting the substring length from the total length.
How much memory does oracle require?
May 10, 2024 am 04:12 AM
The amount of memory required by Oracle depends on database size, activity level, and required performance level: for storing data buffers, index buffers, executing SQL statements, and managing the data dictionary cache. The exact amount is affected by database size, activity level, and required performance level. Best practices include setting the appropriate SGA size, sizing SGA components, using AMM, and monitoring memory usage.
Oracle database server hardware configuration requirements
May 10, 2024 am 04:00 AM
Oracle database server hardware configuration requirements: Processor: multi-core, with a main frequency of at least 2.5 GHz. For large databases, 32 cores or more are recommended. Memory: At least 8GB for small databases, 16-64GB for medium sizes, up to 512GB or more for large databases or heavy workloads. Storage: SSD or NVMe disks, RAID arrays for redundancy and performance. Network: High-speed network (10GbE or higher), dedicated network card, low-latency network. Others: Stable power supply, redundant components, compatible operating system and software, heat dissipation and cooling system.
How to read dbf file in oracle
May 10, 2024 am 01:27 AM
Oracle can read dbf files through the following steps: create an external table and reference the dbf file; query the external table to retrieve data; import the data into the Oracle table.
How much memory is needed to use oracle database
May 10, 2024 am 03:42 AM
The amount of memory required for an Oracle database depends on the database size, workload type, and number of concurrent users. General recommendations: Small databases: 16-32 GB, Medium databases: 32-64 GB, Large databases: 64 GB or more. Other factors to consider include database version, memory optimization options, virtualization, and best practices (monitor memory usage, adjust allocations).
