日考1

.gitignore

@@ -0,0 +1,36 @@
+target/
+!.mvn/wrapper/maven-wrapper.jar
+!**/src/main/**/target/
+!**/src/test/**/target/
+
+### IntelliJ IDEA ###
+.idea
+
+*.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

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.muyu</groupId>
+    <artifactId>day01</artifactId>
+    <version>1.0-SNAPSHOT</version>
+
+    <properties>
+        <maven.compiler.source>17</maven.compiler.source>
+        <maven.compiler.target>17</maven.compiler.target>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    </properties>
+
+</project>

sql/rik01.sql

@@ -0,0 +1,45 @@
+/*
+ Navicat Premium Dump SQL
+
+ Source Server         : localhost_3307
+ Source Server Type    : MySQL
+ Source Server Version : 80031 (8.0.31)
+ Source Host           : localhost:3307
+ Source Schema         : rik01
+
+ Target Server Type    : MySQL
+ Target Server Version : 80031 (8.0.31)
+ File Encoding         : 65001
+
+ Date: 18/07/2024 08:51:18
+*/
+
+SET NAMES utf8mb4;
+SET FOREIGN_KEY_CHECKS = 0;
+
+-- ----------------------------
+-- Table structure for emp
+-- ----------------------------
+DROP TABLE IF EXISTS `emp`;
+CREATE TABLE `emp`  (
+  `eid` int NOT NULL AUTO_INCREMENT,
+  `ename` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NULL DEFAULT NULL,
+  `sex` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NULL DEFAULT NULL,
+  `tel` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NULL DEFAULT NULL,
+  `class_id` int NULL DEFAULT NULL,
+  `age` int NULL DEFAULT NULL,
+  `sal` decimal(10, 2) NULL DEFAULT NULL,
+  PRIMARY KEY (`eid`) USING BTREE
+) ENGINE = InnoDB AUTO_INCREMENT = 7 CHARACTER SET = utf8mb4 COLLATE = utf8mb4_0900_ai_ci ROW_FORMAT = Dynamic;
+
+-- ----------------------------
+-- Records of emp
+-- ----------------------------
+INSERT INTO `emp` VALUES (1, '大武', '男', '1', 20, 20, 10000.00);
+INSERT INTO `emp` VALUES (2, '二五', '女', '1', 30, 34, 1000.00);
+INSERT INTO `emp` VALUES (3, '刘老三', '男', '1', 20, 23, 40.00);
+INSERT INTO `emp` VALUES (4, '李四', '女', '1', 30, 56, 300.00);
+INSERT INTO `emp` VALUES (5, '王五', '男', '1', 30, 89, 2000.00);
+INSERT INTO `emp` VALUES (6, '牛六', '女', '1', 30, 56, 60000.00);
+
+SET FOREIGN_KEY_CHECKS = 1;

sql/sql操作.sql

@@ -0,0 +1,36 @@
+
+
+
+-- 1.依据上图（字段类型一致），创建数据库，添加至少5条数据。（10分）
+INSERT INTO `rik01`.`emp`
+ (`ename`, `sex`, `tel`, `class_id`, `age`, `sal`)
+ VALUES 
+ ('1', '1', '1', 1, 1, 1.00),
+ ('2', '1', '1', 1, 1, 1.00),
+ ('3', '1', '1', 1, 1, 1.00),
+ ('4', '1', '1', 1, 1, 1.00),
+ ('5', '1', '1', 1, 1, 1.00);
+ 
+-- 2.查询所有学生信息，并根据年龄进行降序排序。（10分）
+SELECT * FROM emp ORDER BY age desc;
+
+-- 3.显示姓王的学生的详细信息。（10分）
+SELECT * FROM emp WHERE ename LIKE CONCAT('%','王','%')
+
+-- 4.查询工资大于5000的所有男同学的信息。（10分）
+SELECT * FROM emp WHERE sal > 5000
+
+-- 5.查询班级编号为20的男同学的电话号码。（10分）
+SELECT * FROM emp where class_id = 20
+
+-- 6.查询最低工资。（10分）
+SELECT min(sal) FROM emp
+
+-- 7.查询班级为30的学生的最小年龄。（10分）
+SELECT MIN(age) from emp where class_id = 30
+
+-- 8.查询女生的最低工资。（15分）
+SELECT MIN(sal) FROM emp where sex = '女'
+
+-- 9.查询女学生中薪资最低的人的全部信息。（15分）
+SELECT * FROM emp where sex = '女' AND sal = (SELECT MIN(sal) FROM emp where sex = '女')