Course 2857
Course Introduction:Course introduction: 1. Cross-domain processing, token management, route interception; 2. Real interface debugging, API layer encapsulation; 3. Secondary encapsulation of Echarts and paging components; 4. Vue packaging optimization and answers to common problems.
Course 1795
Course Introduction:Apipost is an API R&D collaboration platform that integrates API design, API debugging, API documentation, and automated testing. It supports grpc, http, websocket, socketio, and socketjs type interface debugging, and supports privatized deployment. Before formally learning ApiPost, you must understand some related concepts, development models, and professional terminology. Apipost official website: https://www.apipost.cn
Course 5521
Course Introduction:(Consult WeChat: phpcn01) The comprehensive practical course aims to consolidate the learning results of the first two stages, achieve flexible application of front-end and PHP core knowledge points, complete your own projects through practical training, and provide guidance on online implementation. Comprehensive practical key practical courses include: social e-commerce system backend development, product management, payment/order management, customer management, distribution/coupon system design, the entire WeChat/Alipay payment process, Alibaba Cloud/Pagoda operation and maintenance, and project online operation. .....
Course 5172
Course Introduction:(Consult WeChat: phpcn01) Starting from scratch, you can solve conventional business logic, operate MySQL with PHP to add, delete, modify, and query, display dynamic website data, master the MVC framework, master the basics of the ThinkPHP6 framework, and learn and flexibly master all knowledge involved in PHP development. point.
Course 8713
Course Introduction:(Consult WeChat: phpcn01) The learning objectives of the front-end development part of the 22nd issue of PHP Chinese website: 1. HTML5/CSS3; 2. JavaScript/ES6; 3. Node basics; 4. Vue3 basics and advanced; 5. Mobile mall/ Website background homepage layout; 6. Automatic calculation of tabs/carousels/shopping carts...
2023-11-02 19:47:58 0 2 286
Is using Alter here an incorrect choice compared to using Cast?
2023-09-13 17:14:57 0 1 290
How to optimize a SQL query with over 2 million rows
2023-09-01 18:09:31 0 2 212
Way to remove double quotes and convert data type to string in Google BigQuery
2023-08-15 11:25:31 0 1 237
Course Introduction:Oracle 中的 CAST 函数用于将一种数据类型转换为另一种数据类型,支持各种数据类型转换,包括数值、字符、日期和布尔类型,以及自定义类型。特定语法为:CAST(expression AS data_type),其中 expression 为要转换的表达式,data_type 为要转换到的数据类型。
2024-05-24 comment 195
Course Introduction:The CAST function is used to explicitly convert a value to another data type with the syntax CAST(expression AS data_type). Usage examples include: convert numeric value to string, string to date, and string to number. Conversion options include numeric, character, date, and boolean types.
2024-04-30 comment 942
Course Introduction:MySQLCAST can handle overflows that occur during the evaluation of numeric expressions. Suppose that if a numeric expression evaluation produces an overflow, MySQL will reflect an error message. Now to handle this overflow we can change the value to UNSIGNED with the help of CAST. For example, when adding 1 to the maximum value of BIGINT, MySQL generates an error due to overflow, as shown below -mysql>Select9223372036854775807+1;ERROR1690(22003):BIGINTvalueisoutofrangein'(9223372036854775807+1)&
2023-09-07 comment 0 596