Oracle 解决"易语言难题"
Oracle 10g以上的版本 Oracle select T.* from (select Rownum as A,2*Rownum B,3*Rownum C from dual connect by level999) Twhere T.A =123 AND T.C 999--借用PHP小三哥的正则表达式and not REGEXP_LIKE(TO_CHAR(A)||TO_CHAR(B)||TO_CHAR(C), '1.*?1|2.*?2|
Oracle 10g以上的版本Oracle
select T.* from (select Rownum as A,2*Rownum B,3*Rownum C from dual connect by level<999) T where T.A >=123 AND T.C < 999 --借用PHP小三哥的正则表达式 and not REGEXP_LIKE(TO_CHAR(A)||TO_CHAR(B)||TO_CHAR(C), '1.*?1|2.*?2|3.*?3|4.*?4|5.*?5|6.*?6|7.*?7|8.*?8|9.*?9|0', 'i')
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
AI Hentai Generator
Generate AI Hentai for free.
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
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.
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 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).
Oracle scheduled tasks execute the creation step once a day
May 10, 2024 am 03:03 AM
To create a scheduled task in Oracle that executes once a day, you need to perform the following three steps: Create a job. Add a subjob to the job and set its schedule expression to "INTERVAL 1 DAY". Enable the job.
How to start the listening program in oracle
May 10, 2024 am 03:12 AM
Oracle listeners are used to manage client connection requests. Startup steps include: Log in to the Oracle instance. Find the listener configuration. Use the lsnrctl start command to start the listener. Use the lsnrctl status command to verify startup.
The Mistral open source code model takes the throne! Codestral is crazy about training in over 80 languages, and domestic Tongyi developers are asking to participate!
Jun 08, 2024 pm 09:55 PM
Produced by 51CTO technology stack (WeChat ID: blog51cto) Mistral released its first code model Codestral-22B! What’s crazy about this model is not only that it’s trained on over 80 programming languages, including Swift, etc. that many code models ignore. Their speeds are not exactly the same. It is required to write a "publish/subscribe" system using Go language. The GPT-4o here is being output, and Codestral is handing in the paper so fast that it’s hard to see! Since the model has just been launched, it has not yet been publicly tested. But according to the person in charge of Mistral, Codestral is currently the best-performing open source code model. Friends who are interested in the picture can move to: - Hug the face: https
What are the stages of Oracle database startup?
May 10, 2024 am 03:15 AM
Oracle database startup is divided into 7 stages: 1. Initialization; 2. Instance recovery; 3. Archive log recovery; 4. Crash recovery; 5. Object opening; 6. Server preparation; 7. Server startup. The process involves loading library files, configuring parameters, restoring the database instance, applying archive logs, updating data files and objects, and finally starting the database service to accept queries.
