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Chapter 15 stored procedures and functions MySQL supports stored procedures and functions from version 5.0. Stored procedures and functions can encapsulate complex SQL logic. Applications do not need to pay attention to the complex SQL logic inside stored procedures and functions, but simply call stored procedures and functions. Overview of s ...

1, setup 1. It's vue3 0 is a new configuration item in, and the value is a function. 2. setup is the stage where all composition APIs are displayed. 3. There are two return values of the setup function: If an object is returned, the properties and methods in the object can be used directly in the template. (focus!) If you return a renderin ...

Problem description Because spring boot usually simplifies the configuration and feels a little handmade, I handwritten JDBC and Mybatis in Mybatis class today. At the same time, there were several problems, which are recorded here. 0x01 JDBC insert Chinese garbled code The code is as follows The characters are still normal when the con ...

constraint Constraint is to restrict the fields, so as to ensure the accuracy, effectiveness and integrity of the data. Multiple constraints are separated directly by spaces # Create a student table and set constraints for each field create table student( id int primary key auto_increment, name varchar(10) not null unique ...

introduction This article is reproduced in: (with code) real plug and play! Inventory 11 kinds of exquisite and common "small" plug-ins in CNN network design The so-called "plug-in" is to add to the icing on the cake and be easy to implant and land, that is, the real plug and play. The "plug-ins" reviewed in this ...

Character arraydefinitionAn array used to store character data. An element in a character array holds a character.General formchar c [10];Character arrays can also be two-dimensional or multi-dimensional arraysFor example: char c[5][10]; It is a two-dimensional character array.Character array initializationAssign each element in the array chara ...

catalogue The overall architecture of SpringThe basic implementation of container and the loading of XML file 1, The overall architecture of Spring Spring is a layered architecture, which mainly includes the following parts Core ContainerData AccessWebAopTest 1,Core Container Core container, including core, Beans, Context and Expression L ...

Purpose of interprocess communication Data transfer: one process needs to send its data to another process.Resource sharing: multiple processes share the same resources.Notification event: a process needs to send a message to another process or group of processes to notify it (them) of an event (such as notifying the parent process when th ...

Stack Stacks and queues can be considered restricted versions of arrays and linked lists. application parenthesis matching Problem Description: match the left and right parentheses of a string. Problem solving idea: enter the stack when you encounter the left parenthesis. In case of right parenthesis, it will be out of the stack. If th ...

java learning notes (7) Start learning java and form the habit of blogging. I hope I can stick to it. Small partners with similar interests can learn together java Foundation 22, Array Definition of array An array is an ordered collection of data of the same typeArray describes several data of the same type, which are arranged and combined ...