日考

.gitignore

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+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

chaxun.sql

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+
+
+
+
+
+
+
+
+#  2.查询所有学生信息，并根据年龄进行降序排序。（10分）
+SELECT * FROM student ORDER BY age DESC
+# 3.显示姓王的学生的详细信息。（10分）
+SELECT * FROM student where INSTR(student.ename,'王')
+ #4.查询工资大于5000的所有男同学的信息。（10分）
+
+SELECT * FROM student where student.sal>5000 and student.sex='男'
+
+# 5.查询班级编号为20的男同学的电话号码。（10分）
+SELECT student.tel FROM student WHERE student.classid=20
+
+# 6.查询最低工资。（10分）
+SELECT student.sal FROM student ORDER BY student.sal ASC LIMIT 1
+
+
+# 7.查询班级为30的学生的最小年龄。（10分）
+
+SELECT student.age FROM student WHERE student.classid=30  ORDER BY student.age ASC LIMIT 1
+
+
+# 8.查询女生的最低工资。（15分）
+SELECT student.sal FROM student WHERE student.sex='女' ORDER BY student.sal ASC LIMIT 1
+
+# 9.查询女学生中薪资最低的人的全部信息。（15分）
+SELECT * FROM student WHERE student.sex='女' ORDER BY student.sal ASC LIMIT 1
+
+
+

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.bwie</groupId>
+    <artifactId>rikao7_18</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>

rikao7_18.sql

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+/*
+ Navicat Premium Data Transfer
+
+ Source Server         : 127.0.0.1
+ Source Server Type    : MySQL
+ Source Server Version : 80037
+ Source Host           : 127.0.0.1:3306
+ Source Schema         : rikao7_18
+
+ Target Server Type    : MySQL
+ Target Server Version : 80037
+ File Encoding         : 65001
+
+ Date: 18/07/2024 08:55:50
+*/
+
+SET NAMES utf8mb4;
+SET FOREIGN_KEY_CHECKS = 0;
+
+-- ----------------------------
+-- Table structure for student
+-- ----------------------------
+DROP TABLE IF EXISTS `student`;
+CREATE TABLE `student`  (
+  `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,
+  `classid` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NULL DEFAULT NULL,
+  `age` int NULL DEFAULT NULL,
+  `sal` decimal(10, 2) NULL DEFAULT NULL,
+  PRIMARY KEY (`eid`) USING BTREE
+) ENGINE = InnoDB CHARACTER SET = utf8mb4 COLLATE = utf8mb4_0900_ai_ci ROW_FORMAT = Dynamic;
+
+-- ----------------------------
+-- Records of student
+-- ----------------------------
+INSERT INTO `student` VALUES (1, '张依依', '男', '123456789', '10', 20, 1000.00);
+INSERT INTO `student` VALUES (2, '刘小红', '女', '123456789', '20', 20, 1556.00);
+INSERT INTO `student` VALUES (3, '李四', '男', '123456782', '30', 23, 4567.00);
+INSERT INTO `student` VALUES (4, '刘强', '男', '123456784', '20', 20, 5600.00);
+INSERT INTO `student` VALUES (5, '王开', '女', '123456786', '30', 25, 1200.00);
+INSERT INTO `student` VALUES (6, '梅超风', '女', '123456787', '10', 20, 5623.00);
+
+SET FOREIGN_KEY_CHECKS = 1;