In the previous article, we learned the basic data CURD method, but in more cases, due to the difference in business logic, CURD operations are often not that simple, especially under complicated business logic, this is also a shortcoming of the
In the previous article we have mastered the basic data curd method, but in more cases, due to the differences in business logic, curd operations are often not so simple, especially complex business logic below, this is the ActiveRecord mode of
thinkphp query Language with coherent operation can be very good to solve the complex business logic requirements, this article we first to in-depth understanding of the framework of the query language.
1. Query Language Introduction
thinkphp
Lambda expressions are also an anonymous function, which is more concise than anonymous functions. It can contain expressions and statements and is suitable for creating delegates and events.
Query expression: it is an expression expressed by the
Original works of Lin Bingwen Evankaka. For more information, see http: blogcsdnnetevankaka. Data Query refers to obtaining the required data from the database. Data query is the most common and important operation in database operations. You can
This article introduces four database query methods by combining text and text: Basic query, connection query, subquery, and regular expression query, for more information, see query data to obtain the required data from the database. Data query is
1. Simple Query A simple Transact-SQL query only includes the select list, from clause, and where clause. They indicate the queried columns, the queried tables or views, and the search conditions. For example, the following statement queries the
Essays-66 Articles-0 comments-MySQL slow query (ii)-Pt-query-digest detailed slow query log one, Introduction Pt-query-digest is a tool for analyzing MySQL slow query, it can analyze Binlog, Gene RAL Log, Slowlog, can also be analyzed via
Query data refers to obtaining the required data from the database. Query data is the most commonly used and most important operation in database operations. Users can use different query methods according to their needs for the data. Different data
A complete URL string, from the "?" (not included?) To "#" (If there is #) or to the end of the URL string (if no #) is called the query string.You can use the parse method in the query string module to convert the string to an object, using the
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.