Article Introduction：Overview of data preparation skills for PHP and Oracle database: Data preparation is a very important link when developing using PHP and Oracle database. This article will introduce some common data preparation techniques, including connecting to the database, creating tables, inserting data, querying data, etc. At the same time, to facilitate understanding, relevant code examples will be provided in the article. Connecting to the database: In PHP, you can use the OCI extension to connect to the Oracle database. First, make sure the extension is enabled. Then, use OCI extension

2023-07-11 comment 0  1022

Article Introduction：Data processing methods include data collection, data conversion, data grouping, data organization, data calculation, data storage, data retrieval, and data sorting. The process of data processing is roughly divided into three stages: data preparation, processing and output.

2019-12-25 comment 0  38903

Article Introduction：This article mainly shares with you examples of mysql database preparation work, including how to start/stop the mysql database service, log in/out of the mysql system, database backup and recovery, etc. I hope it can help you.

2018-03-15 comment 0  1295

Article Introduction：Here are the 5 most common issues you're likely to encounter when using Python for data preparation, including confusion around missing and boolean values.

2024-10-29 comment 0  622

Article Introduction：The database system consists of 4 parts: 1. Database refers to a collection of organized and shareable data stored in the computer for a long time; 2. Hardware refers to the various physical devices that make up the computer system, including storage requirements. external devices; 3. Software, including operating systems, database management systems and applications; 4. Personnel, including system analysts and database designers, application programmers (responsible for writing applications that use the database), end users (using interfaces or query language to access the database), database administrator (responsible for the overall information control of the database).

2022-07-15 comment 0  33431

Article Introduction：Data security includes data backup and recovery, access control, encryption, firewalls, security policies and specifications, security auditing and monitoring, vulnerability management and remediation, employee training and education, physical security measures, disaster recovery and business continuity plans, etc. Detailed introduction: 1. Data backup and recovery. Data backup refers to copying important data to other storage media or locations to prevent data loss or damage. Backup data can be restored when data is lost or damaged to ensure data availability and Integrity; 2. Access control, through identity authentication, authorization, rights management, etc.

2023-09-12 comment 0  7124

Article Introduction：The basic functions of the data warehouse include: 1. ETL design, including data extraction and synchronization, data cleaning, and data conversion; 2. Data layering, which is generally divided into ODS layer, CM layer, and ML layer; 3. Preliminary data modeling.

2022-01-07 comment 0  7938

Article Introduction：The database design process does not include algorithm design. The database design process mainly includes requirements analysis, conceptual structure design, logical structure analysis, database physical design, database implementation, database operation and maintenance stages.

2019-06-20 comment 0  8509

Article Introduction：Data structure includes: 1. The logical structure of data, reflecting the logical relationship between data elements; 2. The physical structure of data, the representation of the data structure in the computer; 3. The data storage structure refers to the logical structure of the data stored in the computer. Regarding storage forms in space, commonly used storage structures include sequential storage, chain storage, index storage, hash storage, etc.

2020-12-28 comment 0  62788

Article Introduction：The data manipulation functions of SQL mainly include data insertion, deletion, modification and query. SQL data manipulation functions mainly include data insertion, deletion and modification of basic tables and views, especially strong data query functions; while data control functions mainly control user access rights to ensure system security.

2021-01-28 comment 0  12577

Article Introduction：The data types of excel include numeric data, character data, logical data, and date data. Various types of data can be entered into cells in Excel, such as text, numerical values, dates, times, etc.

2019-07-10 comment 0  65150

Article Introduction：Data storage structures include sequential storage and chain storage, which are the two most basic storage structures of data. The storage structure of data refers to the representation of the logical structure of data in the computer.

2019-07-24 comment 0  15873

Article Introduction：The database design process does not include algorithm design. The database design process mainly includes requirements analysis, conceptual structure design, logical structure analysis, database physical design, database implementation, database operation and maintenance stages.

2021-04-23 comment 0  8636

Article Introduction：Inserting Multiple Rows with PDO Prepared StatementsInsertion of multiple data rows into a database using a single prepared statement is possible....

2024-11-06 comment 0  797

Article Introduction：Database security includes two aspects: system operation security and system information security. Protection technologies for database security include: database encryption (core data storage encryption), database firewall (anti-vulnerability, anti-attack), data desensitization (anonymization of sensitive data), etc.

2020-04-27 comment 0  9243

Article Introduction：:thinkPHP uses pclzip packaging to back up mysql database: This article describes the example of thinkPHP using pclzip packaging to back up mysql database. Share it with everyone for your reference, the details are as follows: PclZip introduces the PclZip library which can compress and decompress compressed files in Zip format (WinZip, PKZIP); and can process such files, including generating compressed files and listing compressed files. Database backup of content, decompressed files, etc. is a very important thing. There are many ways to back up. Some are directly backed up through vps, and some are backed up through phpmyadmin.

2016-07-29 comment 0  1112

Article Introduction：PDO Prepared Statements: A Comprehensive Guide for PHP DevelopersPrepared statements are essential for secure and efficient database interactions...

2024-12-16 comment 0  956

Article Introduction：Database objects include: users (people who have permission to access the database), views (display the data items required by the user), indexes (providing users with a way to quickly access data), triggers (a collection of user-defined SQL transaction commands), and sequences. (providing a sequence table of unique values), chart (a schematic diagram of the relationship between database tables).

2020-07-07 comment 0  37132

Article Introduction：JavaScript is a widely used programming language that can be used to develop web applications, mobile applications, etc. In JavaScript, there are many basic data types, including numbers, strings, Boolean, null and undefined, etc. However, JavaScript’s basic data types do not include some common data types found in other programming languages. In this article, we will introduce these data types. 1. Primitive data types The basic data types in JavaScript are primitive data types. this

2023-04-21 comment 0  1129

Article Introduction：Database integrity includes three types: 1. Entity integrity, multiple records in the same data table cannot have the same identification; 2. Domain integrity, the data in restricted fields must conform to the default data type; 3. Reference integrity property, if two data tables are related, the records in the parent data table must exist before the records in the child data table exist.

2020-05-28 comment 0  38978