From 40fab62c2786634d5e16a2b80334828b42e48743 Mon Sep 17 00:00:00 2001 From: chentaisen <14615430+chentaisen@user.noreply.gitee.com> Date: Fri, 19 Jul 2024 09:10:38 +0800 Subject: [PATCH] day02rk --- .gitignore | 38 +++++++++ .idea/$PROJECT_FILE$ | 11 +++ .idea/.gitignore | 8 ++ .idea/encodings.xml | 8 ++ .idea/misc.xml | 20 +++++ .idea/qaplug_profiles.xml | 12 +++ .idea/vcs.xml | 6 ++ day02rk.sql | 133 +++++++++++++++++++++++++++++++ pom.xml | 17 ++++ src/main/java/com/bwie/Main.java | 7 ++ 10 files changed, 260 insertions(+) create mode 100644 .gitignore create mode 100644 .idea/$PROJECT_FILE$ create mode 100644 .idea/.gitignore create mode 100644 .idea/encodings.xml create mode 100644 .idea/misc.xml create mode 100644 .idea/qaplug_profiles.xml create mode 100644 .idea/vcs.xml create mode 100644 day02rk.sql create mode 100644 pom.xml create mode 100644 src/main/java/com/bwie/Main.java diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..5ff6309 --- /dev/null +++ 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 \ No newline at end of file diff --git a/.idea/$PROJECT_FILE$ b/.idea/$PROJECT_FILE$ new file mode 100644 index 0000000..58b7e3e --- /dev/null +++ b/.idea/$PROJECT_FILE$ @@ -0,0 +1,11 @@ + + + + + + + \ No newline at end of file diff --git a/.idea/.gitignore b/.idea/.gitignore new file mode 100644 index 0000000..13566b8 --- /dev/null +++ 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 diff --git a/.idea/encodings.xml b/.idea/encodings.xml new file mode 100644 index 0000000..63574ec --- /dev/null +++ b/.idea/encodings.xml @@ -0,0 +1,8 @@ + + + + + + + + \ No newline at end of file diff --git a/.idea/misc.xml b/.idea/misc.xml new file mode 100644 index 0000000..9e844e1 --- /dev/null +++ b/.idea/misc.xml @@ -0,0 +1,20 @@ + + + + + + + + + + + + + + \ No newline at end of file diff --git a/.idea/qaplug_profiles.xml b/.idea/qaplug_profiles.xml new file mode 100644 index 0000000..9a7566c --- /dev/null +++ b/.idea/qaplug_profiles.xml @@ -0,0 +1,12 @@ + + + + + \ No newline at end of file diff --git a/.idea/vcs.xml b/.idea/vcs.xml new file mode 100644 index 0000000..94a25f7 --- /dev/null +++ b/.idea/vcs.xml @@ -0,0 +1,6 @@ + + + + + + \ No newline at end of file diff --git a/day02rk.sql b/day02rk.sql new file mode 100644 index 0000000..54ad90d --- /dev/null +++ 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 + + + + + + + + + + + + + + + + + + + + + + diff --git a/pom.xml b/pom.xml new file mode 100644 index 0000000..aff3703 --- /dev/null +++ b/pom.xml @@ -0,0 +1,17 @@ + + + 4.0.0 + + com.bwie + day02rk + 1.0-SNAPSHOT + + + 8 + 8 + UTF-8 + + + diff --git a/src/main/java/com/bwie/Main.java b/src/main/java/com/bwie/Main.java new file mode 100644 index 0000000..1287888 --- /dev/null +++ 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!"); + } +} \ No newline at end of file