day02rk

2024-07-19 09:10:38 +08:00 · 2024-07-19 09:10:38 +08:00 · 40fab62c27
commit 40fab62c27
10 changed files with 260 additions and 0 deletions
--- a/.gitignore
+++ b/.gitignore
@ -0,0 +1,38 @@
+target/
+!.mvn/wrapper/maven-wrapper.jar
+!**/src/main/**/target/
+!**/src/test/**/target/
+
+### IntelliJ IDEA ###
+.idea/modules.xml
+.idea/jarRepositories.xml
+.idea/compiler.xml
+.idea/libraries/
+*.iws
+*.iml
+*.ipr
+
+### Eclipse ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+build/
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### VS Code ###
+.vscode/
+
+### Mac OS ###
+.DS_Store
--- a/.idea/$PROJECT_FILE$
+++ b/.idea/$PROJECT_FILE$
@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="AnalysisProjectProfileManager">
+    <option name="PROJECT_PROFILE" />
+    <option name="USE_PROJECT_LEVEL_SETTINGS" value="false" />
+    <list size="0" />
+  </component>
+  <component name="SuppressionsComponent">
+    <option name="suppComments" value="[]" />
+  </component>
+</project>
--- a/.idea/.gitignore
+++ b/.idea/.gitignore
@ -0,0 +1,8 @@
+# Default ignored files
+/shelf/
+/workspace.xml
+# Editor-based HTTP Client requests
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml
--- a/.idea/encodings.xml
+++ b/.idea/encodings.xml
@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="Encoding" defaultCharsetForPropertiesFiles="UTF-8">
+    <file url="file://$PROJECT_DIR$/src/main/java" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/src/main/resources" charset="UTF-8" />
+    <file url="PROJECT" charset="UTF-8" />
+  </component>
+</project>
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ExternalStorageConfigurationManager" enabled="true" />
+  <component name="MarkdownSettingsMigration">
+    <option name="stateVersion" value="1" />
+  </component>
+  <component name="MavenProjectsManager">
+    <option name="originalFiles">
+      <list>
+        <option value="$PROJECT_DIR$/pom.xml" />
+      </list>
+    </option>
+  </component>
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" default="true" project-jdk-name="1.8 (2)" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/out" />
+  </component>
+  <component name="SuppressionsComponent">
+    <option name="suppComments" value="[]" />
+  </component>
+</project>
--- a/.idea/qaplug_profiles.xml
+++ b/.idea/qaplug_profiles.xml
@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="AnalysisProjectProfileManager">
+    <option name="PROJECT_PROFILE" value="Project Default" />
+    <option name="USE_PROJECT_LEVEL_SETTINGS" value="false" />
+    <scopes />
+    <profiles>
+      <profile profile_name="Project Default" version="1.0" is_locked="false" />
+    </profiles>
+    <list size="0" />
+  </component>
+</project>
--- a/.idea/vcs.xml
+++ b/.idea/vcs.xml
@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$" vcs="Git" />
+  </component>
+</project>
--- a/day02rk.sql
+++ b/day02rk.sql
@ -0,0 +1,133 @@
+/*
+ Navicat Premium Data Transfer
+
+ Source Server         : 106.54.193.225
+ Source Server Type    : MySQL
+ Source Server Version : 50736
+ Source Host           : 106.54.193.225:3306
+ Source Schema         : day02rk
+
+ Target Server Type    : MySQL
+ Target Server Version : 50736
+ File Encoding         : 65001
+
+ Date: 19/07/2024 09:07:19
+*/
+
+SET NAMES utf8mb4;
+SET FOREIGN_KEY_CHECKS = 0;
+
+-- ----------------------------
+-- Table structure for t_course
+-- ----------------------------
+DROP TABLE IF EXISTS `t_course`;
+CREATE TABLE `t_course`  (
+  `course_id` int(11) NOT NULL AUTO_INCREMENT,
+  `course_name` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT NULL,
+  PRIMARY KEY (`course_id`) USING BTREE
+) ENGINE = InnoDB AUTO_INCREMENT = 4 CHARACTER SET = utf8mb4 COLLATE = utf8mb4_general_ci ROW_FORMAT = Dynamic;
+
+-- ----------------------------
+-- Records of t_course
+-- ----------------------------
+INSERT INTO `t_course` VALUES (1, '语文');
+INSERT INTO `t_course` VALUES (2, '数学');
+INSERT INTO `t_course` VALUES (3, '英语');
+
+-- ----------------------------
+-- Table structure for t_scope
+-- ----------------------------
+DROP TABLE IF EXISTS `t_scope`;
+CREATE TABLE `t_scope`  (
+  `scope_id` int(11) NOT NULL AUTO_INCREMENT,
+  `course_id` int(11) NULL DEFAULT NULL,
+  `student_id` int(11) NULL DEFAULT NULL,
+  PRIMARY KEY (`scope_id`) USING BTREE
+) ENGINE = InnoDB AUTO_INCREMENT = 11 CHARACTER SET = utf8mb4 COLLATE = utf8mb4_general_ci ROW_FORMAT = Dynamic;
+
+-- ----------------------------
+-- Records of t_scope
+-- ----------------------------
+INSERT INTO `t_scope` VALUES (1, 1, 1);
+INSERT INTO `t_scope` VALUES (2, 1, 2);
+INSERT INTO `t_scope` VALUES (3, 1, 3);
+INSERT INTO `t_scope` VALUES (4, 2, 3);
+INSERT INTO `t_scope` VALUES (5, 2, 4);
+INSERT INTO `t_scope` VALUES (6, 2, 5);
+INSERT INTO `t_scope` VALUES (7, 3, 6);
+INSERT INTO `t_scope` VALUES (8, 3, 7);
+INSERT INTO `t_scope` VALUES (9, 3, 8);
+INSERT INTO `t_scope` VALUES (10, 3, 9);
+
+-- ----------------------------
+-- Table structure for t_student
+-- ----------------------------
+DROP TABLE IF EXISTS `t_student`;
+CREATE TABLE `t_student`  (
+  `student_id` int(11) NOT NULL AUTO_INCREMENT,
+  `student_name` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT NULL,
+  `student_sex` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT NULL,
+  PRIMARY KEY (`student_id`) USING BTREE
+) ENGINE = InnoDB AUTO_INCREMENT = 99 CHARACTER SET = utf8mb4 COLLATE = utf8mb4_general_ci ROW_FORMAT = Dynamic;
+
+-- ----------------------------
+-- Records of t_student
+-- ----------------------------
+INSERT INTO `t_student` VALUES (1, '张三', '男');
+INSERT INTO `t_student` VALUES (2, 'CVBS', '女');
+INSERT INTO `t_student` VALUES (3, '理论', '女');
+INSERT INTO `t_student` VALUES (4, '解决', '男');
+INSERT INTO `t_student` VALUES (5, '慢慢', '男');
+INSERT INTO `t_student` VALUES (6, '利旧', '女');
+INSERT INTO `t_student` VALUES (7, '赵六', '男');
+INSERT INTO `t_student` VALUES (8, '田七', '男');
+INSERT INTO `t_student` VALUES (9, '李四', '女');
+INSERT INTO `t_student` VALUES (10, '王五', '男');
+
+SET FOREIGN_KEY_CHECKS = 1;
+
+
+
+
+SELECT count(student_sex),student_sex count FROM t_student GROUP BY student_sex
+
+
+
+-- 3.查询男生和女生各多少人。（15分）
+SELECT count(student_sex) count,student_sex  FROM t_student GROUP BY student_sex
+
+-- 4.	查询男生和女生分别占总人数的比例。（20分）
+SELECT count(student_id) count FROM t_student WHERE COUNT(student_sex) GROUP BY student_sex
+
+
+-- 5.查询每门课程下的学生总人数。（15分）
+
+SELECT
+    count(*),c.course_name
+FROM
+    t_scope s
+        LEFT JOIN t_course c ON s.course_id = c.course_id
+        LEFT JOIN t_student t ON t.student_id = s.student_id
+GROUP BY c.course_id
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
--- a/pom.xml
+++ b/pom.xml
@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>com.bwie</groupId>
+    <artifactId>day02rk</artifactId>
+    <version>1.0-SNAPSHOT</version>
+
+    <properties>
+        <maven.compiler.source>8</maven.compiler.source>
+        <maven.compiler.target>8</maven.compiler.target>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    </properties>
+
+</project>
--- a/src/main/java/com/bwie/Main.java
+++ b/src/main/java/com/bwie/Main.java
@ -0,0 +1,7 @@
+package com.bwie;
+
+public class Main {
+    public static void main(String[] args) {
+        System.out.println("Hello world!");
+    }
+}