exam-day2

.gitignore

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+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

.idea/.gitignore

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+# 默认忽略的文件
+/shelf/
+/workspace.xml
+# 基于编辑器的 HTTP 客户端请求
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml

.idea/encodings.xml

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+<?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>

.idea/misc.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ExternalStorageConfigurationManager" enabled="true" />
+  <component name="MavenProjectsManager">
+    <option name="originalFiles">
+      <list>
+        <option value="$PROJECT_DIR$/pom.xml" />
+      </list>
+    </option>
+  </component>
+  <component name="MavenRunner">
+    <option name="jreName" value="1.8" />
+    <option name="skipTests" value="true" />
+    <option name="vmOptions" value="-DarchetypeCatalog=internal" />
+  </component>
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_17" default="true" project-jdk-name="17" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/out" />
+  </component>
+</project>

pom.xml

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+<?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.yuan</groupId>
+    <artifactId>exam-day2</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>

src/main/java/sql/day1.sql

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+SELECT * FROM `t_stu`
+
+-- 添加至少5条数据
+INSERT INTO `day1`.`t_stu` 
+(`EID`, `ENAME`, `SEX`, `TEL`, `CLASSID`, `AGE`, `SAL`) 
+VALUES 
+(10001, '张依依', '男', '1234567891', 10, 20, 1000.00),
+(10011, '刘小红', '女', '1234567891', 20, 20, 1556.00),
+(10002, '李四', '男', '1234567891', 30, 23, 4567.00),
+(10003, '李强', '男', '1234567891', 20, 20, 5666.00),
+(10004, '王艳', '女', '1234567891', 20, 24, 6800.00),
+(10005, '王强', '男', '1234567891', 30, 20, 10000.00),
+(10006, '王凯', '女', '1234567891', 30, 20, 1200.00)
+
+-- 查询所有学生信息，并根据年龄进行降序排序。
+SELECT * FROM t_stu ORDER BY AGE desc
+-- 显示姓王的学生的详细信息。
+SELECT * FROM t_stu WHERE instr(ENAME,'王') 
+-- 查询工资大于5000的所有男同学的信息。
+SELECT * FROM t_stu WHERE SAL > 5000 and SEX = '男'
+-- 查询班级编号为20的男同学的电话号码。
+SELECT TEL FROM t_stu WHERE CLASSID = 20 and SEX = '男'
+-- 查询最低工资。
+SELECT MIN(SAL) FROM t_stu 
+-- 查询班级为30的学生的最小年龄。
+SELECT MIN(AGE) FROM t_stu WHERE CLASSID = 30
+-- 查询女生的最低工资。
+SELECT MIN(SAL) FROM t_stu WHERE SEX = '女'
+-- 查询女学生中薪资最低的人的全部信息。
+SELECT * FROM t_stu WHERE EID = 
+(SELECT EID FROM t_stu WHERE SEX = '女' AND SAL = 
+(SELECT MIN( SAL ) FROM t_stu WHERE SEX = '女' ))
+
+
+
+
+

src/main/java/sql/t_stu.sql

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+/*
+ Navicat Premium Data Transfer
+
+ Source Server         : Tencent
+ Source Server Type    : MySQL
+ Source Server Version : 80300
+ Source Host           : 111.229.195.89:3306
+ Source Schema         : day1
+
+ Target Server Type    : MySQL
+ Target Server Version : 80300
+ File Encoding         : 65001
+
+ Date: 18/07/2024 09:11:20
+*/
+
+SET NAMES utf8mb4;
+SET FOREIGN_KEY_CHECKS = 0;
+
+-- ----------------------------
+-- Table structure for t_stu
+-- ----------------------------
+DROP TABLE IF EXISTS `t_stu`;
+CREATE TABLE `t_stu`  (
+  `EID` int NOT NULL AUTO_INCREMENT,
+  `ENAME` varchar(50) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NOT NULL,
+  `SEX` varchar(50) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NOT NULL,
+  `TEL` varchar(11) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NOT NULL,
+  `CLASSID` int NOT NULL,
+  `AGE` int NOT NULL,
+  `SAL` decimal(10, 2) NOT NULL,
+  PRIMARY KEY (`EID`) USING BTREE
+) ENGINE = InnoDB AUTO_INCREMENT = 10012 CHARACTER SET = utf8mb4 COLLATE = utf8mb4_0900_ai_ci ROW_FORMAT = Dynamic;
+
+-- ----------------------------
+-- Records of t_stu
+-- ----------------------------
+INSERT INTO `t_stu` VALUES (10001, '张依依', '男', '1234567891', 10, 20, 1000.00);
+INSERT INTO `t_stu` VALUES (10002, '李四', '男', '1234567891', 30, 23, 4567.00);
+INSERT INTO `t_stu` VALUES (10003, '李强', '男', '1234567891', 20, 20, 5666.00);
+INSERT INTO `t_stu` VALUES (10004, '王艳', '女', '1234567891', 20, 24, 6800.00);
+INSERT INTO `t_stu` VALUES (10005, '王强', '男', '1234567891', 30, 20, 10000.00);
+INSERT INTO `t_stu` VALUES (10006, '王凯', '女', '1234567891', 30, 20, 1200.00);
+INSERT INTO `t_stu` VALUES (10011, '刘小红', '女', '1234567891', 20, 20, 1556.00);
+
+SET FOREIGN_KEY_CHECKS = 1;