Course Intermediate  18773

Course Introduction：Python is a computer programming language and a dynamic, object-oriented scripting language. It was originally designed for writing automated scripts (shell). This course will lead you to manually develop a word query system from scratch using python3.6

Course Advanced  10220

Course Introduction：In this era of data explosion, how can we find what we want in the vast amount of data? How is this achieved? Next, you can learn PHP's fuzzy query technology together.

Course Advanced  21283

Course Introduction：In this era of data explosion, how can we find what we want in the vast amount of data? How is this achieved? Next, you can learn PHP's fuzzy query technology together.

Course Elementary  10551

Course Introduction："JavaScript Basic Grammar and Basic Statements Video Tutorial" This course was recorded by Beifeng.com. JavaScript is a literal scripting language. It is a dynamically typed, weakly typed, prototype-based language with built-in support for types. Its interpreter is called the JavaScript engine, which is part of the browser and is widely used in client-side scripting languages. It was first used on HTML (an application under Standard Universal Markup Language) web pages to add dynamic functions to HTML web pages. .

Course Intermediate  6934

Course Introduction：How to tune SQL according to execution plan under massive data? How does the mysql index system cope with massive data storage? How to design a mysql index with excellent performance under massive data Full analysis of clustered index and non-clustered index of mysql Must-ask nouns in mysql index interview: table return, index coverage, leftmost matching How to optimize indexes for specific SQL scenarios

Course Introduction：The php sql subquery statement is to first query a result through a statement, and then query again from the result through a query statement, such as "select max(goods_id),cat_id,goods_name from goods group by cat".

2020-08-07 comment 0  2306

Course Introduction：PHP is a very popular open source server-side scripting language commonly used for the development of web applications. In PHP programming, splicing query statements is a common requirement. This article will introduce how to use PHP to splice query statements. Composition of SQL query statement SQL query statement consists of SELECT, FROM, WHERE, GROUP BY, HAVING and ORDER BY statements. The following are some commonly used query statements: - Query all records: ```SELECT * FROM table

2023-05-07 comment 0  638

Course Introduction：There are nested query statements in mysql, and the syntax is "SELECT statement WHERE condition (SELECT statement)"; this statement is also called a subquery statement, and it can nest another layer of query statements after the where in the existing query statement. That is, the inner query results are used as the data referenced by the outer query.

2022-05-27 comment 0  2359

Course Introduction：MySQL is a common relational database, and paging query is one of the operations frequently used in database applications. Through paging query, a large amount of data can be displayed in pages, improving query efficiency and user experience. In this article, we will learn about paging query statements in MySQL. 1. LIMIT statement In MySQL, LIMIT is used to control the limit on the number of rows in the result set returned by the statement, and can easily implement paging queries. The syntax of LIMIT is as follows:```SELECT column FROM table LI

2023-05-12 comment 0  2002

Course Introduction：Laravel is a powerful PHP framework. When developing web applications, Laravel provides many convenient functions, among which the database query function is what developers must master. This article will introduce commonly used database query statements in Laravel, including basic queries, aggregate queries, conditional queries, and related queries, etc., to help developers better use the Laravel framework for database operations. 1. Basic query The most basic query statement in Laravel is the select statement, which is used to query data in the data table. under

2023-05-26 comment 0  840