exam-day2
commit
87aa0e8893
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target/
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!.mvn/wrapper/maven-wrapper.jar
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!**/src/main/**/target/
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!**/src/test/**/target/
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### IntelliJ IDEA ###
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.idea/modules.xml
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.idea/jarRepositories.xml
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.idea/compiler.xml
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.idea/libraries/
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*.iws
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*.iml
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*.ipr
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### Eclipse ###
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.apt_generated
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.classpath
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.factorypath
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.project
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.settings
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.springBeans
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.sts4-cache
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### NetBeans ###
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/nbproject/private/
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/nbbuild/
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/dist/
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/nbdist/
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/.nb-gradle/
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build/
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!**/src/main/**/build/
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!**/src/test/**/build/
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### VS Code ###
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.vscode/
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### Mac OS ###
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.DS_Store
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# 默认忽略的文件
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/shelf/
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/workspace.xml
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# 基于编辑器的 HTTP 客户端请求
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/httpRequests/
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# Datasource local storage ignored files
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/dataSources/
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/dataSources.local.xml
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<?xml version="1.0" encoding="UTF-8"?>
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<project version="4">
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<component name="Encoding" defaultCharsetForPropertiesFiles="UTF-8">
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<file url="file://$PROJECT_DIR$/src/main/java" charset="UTF-8" />
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<file url="file://$PROJECT_DIR$/src/main/resources" charset="UTF-8" />
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<file url="PROJECT" charset="UTF-8" />
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</component>
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</project>
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@ -0,0 +1,19 @@
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<?xml version="1.0" encoding="UTF-8"?>
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<project version="4">
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<component name="ExternalStorageConfigurationManager" enabled="true" />
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<component name="MavenProjectsManager">
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<option name="originalFiles">
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<list>
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<option value="$PROJECT_DIR$/pom.xml" />
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</list>
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</option>
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</component>
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<component name="MavenRunner">
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<option name="jreName" value="1.8" />
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<option name="skipTests" value="true" />
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<option name="vmOptions" value="-DarchetypeCatalog=internal" />
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</component>
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<component name="ProjectRootManager" version="2" languageLevel="JDK_17" default="true" project-jdk-name="17" project-jdk-type="JavaSDK">
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<output url="file://$PROJECT_DIR$/out" />
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</component>
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</project>
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@ -0,0 +1,17 @@
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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<groupId>com.yuan</groupId>
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<artifactId>exam-day2</artifactId>
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<version>1.0-SNAPSHOT</version>
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<properties>
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<maven.compiler.source>17</maven.compiler.source>
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<maven.compiler.target>17</maven.compiler.target>
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<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
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</properties>
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</project>
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SELECT * FROM `t_stu`
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-- 添加至少5条数据
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INSERT INTO `day1`.`t_stu`
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(`EID`, `ENAME`, `SEX`, `TEL`, `CLASSID`, `AGE`, `SAL`)
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VALUES
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(10001, '张依依', '男', '1234567891', 10, 20, 1000.00),
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(10011, '刘小红', '女', '1234567891', 20, 20, 1556.00),
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(10002, '李四', '男', '1234567891', 30, 23, 4567.00),
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(10003, '李强', '男', '1234567891', 20, 20, 5666.00),
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(10004, '王艳', '女', '1234567891', 20, 24, 6800.00),
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(10005, '王强', '男', '1234567891', 30, 20, 10000.00),
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(10006, '王凯', '女', '1234567891', 30, 20, 1200.00)
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-- 查询所有学生信息，并根据年龄进行降序排序。
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SELECT * FROM t_stu ORDER BY AGE desc
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-- 显示姓王的学生的详细信息。
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SELECT * FROM t_stu WHERE instr(ENAME,'王')
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-- 查询工资大于5000的所有男同学的信息。
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SELECT * FROM t_stu WHERE SAL > 5000 and SEX = '男'
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-- 查询班级编号为20的男同学的电话号码。
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SELECT TEL FROM t_stu WHERE CLASSID = 20 and SEX = '男'
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-- 查询最低工资。
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SELECT MIN(SAL) FROM t_stu
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-- 查询班级为30的学生的最小年龄。
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SELECT MIN(AGE) FROM t_stu WHERE CLASSID = 30
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-- 查询女生的最低工资。
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SELECT MIN(SAL) FROM t_stu WHERE SEX = '女'
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-- 查询女学生中薪资最低的人的全部信息。
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SELECT * FROM t_stu WHERE EID =
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(SELECT EID FROM t_stu WHERE SEX = '女' AND SAL =
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(SELECT MIN( SAL ) FROM t_stu WHERE SEX = '女' ))
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@ -0,0 +1,46 @@
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/*
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Navicat Premium Data Transfer
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Source Server : Tencent
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Source Server Type : MySQL
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Source Server Version : 80300
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Source Host : 111.229.195.89:3306
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Source Schema : day1
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Target Server Type : MySQL
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Target Server Version : 80300
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File Encoding : 65001
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Date: 18/07/2024 09:11:20
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*/
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SET NAMES utf8mb4;
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SET FOREIGN_KEY_CHECKS = 0;
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-- ----------------------------
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-- Table structure for t_stu
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-- ----------------------------
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DROP TABLE IF EXISTS `t_stu`;
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CREATE TABLE `t_stu` (
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`EID` int NOT NULL AUTO_INCREMENT,
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`ENAME` varchar(50) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NOT NULL,
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`SEX` varchar(50) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NOT NULL,
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`TEL` varchar(11) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NOT NULL,
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`CLASSID` int NOT NULL,
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`AGE` int NOT NULL,
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`SAL` decimal(10, 2) NOT NULL,
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PRIMARY KEY (`EID`) USING BTREE
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) ENGINE = InnoDB AUTO_INCREMENT = 10012 CHARACTER SET = utf8mb4 COLLATE = utf8mb4_0900_ai_ci ROW_FORMAT = Dynamic;
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-- ----------------------------
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-- Records of t_stu
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-- ----------------------------
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INSERT INTO `t_stu` VALUES (10001, '张依依', '男', '1234567891', 10, 20, 1000.00);
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INSERT INTO `t_stu` VALUES (10002, '李四', '男', '1234567891', 30, 23, 4567.00);
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INSERT INTO `t_stu` VALUES (10003, '李强', '男', '1234567891', 20, 20, 5666.00);
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INSERT INTO `t_stu` VALUES (10004, '王艳', '女', '1234567891', 20, 24, 6800.00);
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INSERT INTO `t_stu` VALUES (10005, '王强', '男', '1234567891', 30, 20, 10000.00);
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INSERT INTO `t_stu` VALUES (10006, '王凯', '女', '1234567891', 30, 20, 1200.00);
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INSERT INTO `t_stu` VALUES (10011, '刘小红', '女', '1234567891', 20, 20, 1556.00);
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SET FOREIGN_KEY_CHECKS = 1;
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||||||
Loading…
Reference in New Issue