{"id":164,"date":"2024-06-14T19:38:13","date_gmt":"2024-06-14T11:38:13","guid":{"rendered":"http:\/\/zhaoyanqi.cn\/?p=164"},"modified":"2024-06-19T22:15:40","modified_gmt":"2024-06-19T14:15:40","slug":"mysql%e4%b8%80%e4%ba%9b%e5%9f%ba%e6%9c%ac%e6%93%8d%e4%bd%9c2%ef%bc%88%e5%a2%9e%e5%88%a0%e6%94%b9%e6%9f%a5%ef%bc%89","status":"publish","type":"post","link":"https:\/\/zhaoyanqi.cn\/?p=164","title":{"rendered":"\u5b9e\u9a8c\uff1amysql\u4e00\u4e9b\u57fa\u672c\u64cd\u4f5c2\uff08\u589e\u5220\u6539\u67e5\uff09"},"content":{"rendered":"\n

\u5b9e\u9a8c\u4e00\uff1a\u521b\u5efa\u4e00\u4e2a\u5305\u542b\u7528\u6237\u540d\u3001\u8eab\u9ad8\u3001\u4f53\u91cd\u3001\u51fa\u751f\u65e5\u671f\u548c\u591a\u4e2a\u7231\u597d\u7684\u7528\u6237\u4fe1\u606f\u8868\uff0c\u5e76\u63d2\u516510\u4e2a\u7528\u6237\u4fe1\u606f\uff0c\u8981\u6c42id\u53f7\u662f\u81ea\u52a8\u9012\u589e\u7684\uff1a<\/h2>\n\n\n\n

1. \u521b\u5efa\u7528\u6237\u4fe1\u606f\u8868<\/h3>\n\n\n\n

\u4f7f\u7528 InnoDB \u5b58\u50a8\u5f15\u64ce\u6765\u521b\u5efa\u8fd9\u4e2a\u8868\uff0c\u786e\u4fdd ID \u81ea\u52a8\u9012\u589e\uff0c\u5e76\u4e14\u53ef\u4ee5\u5b58\u50a8\u591a\u4e2a\u7231\u597d\u3002<\/p>\n\n\n\n

CREATE TABLE user_info (\n    id INT AUTO_INCREMENT PRIMARY KEY,\n    username VARCHAR(255) NOT NULL,\n    height DECIMAL(5,2) NOT NULL,\n    weight DECIMAL(5,2) NOT NULL,\n    birthdate DATE NOT NULL,\n    hobbies TEXT\n) ENGINE=InnoDB;<\/code><\/pre>\n\n\n\n
2. \u63d2\u516510\u4e2a\u7528\u6237\u4fe1\u606f<\/h3>\n\n\n\n
\u4f7f\u7528 INSERT INTO<\/code> \u8bed\u53e5\u63d2\u516510\u4e2a\u7528\u6237\u4fe1\u606f\u3002\u6bcf\u4e2a\u7528\u6237\u7684\u4fe1\u606f\u5305\u62ec\u7528\u6237\u540d\u3001\u8eab\u9ad8\u3001\u4f53\u91cd\u3001\u51fa\u751f\u65e5\u671f\u548c\u591a\u4e2a\u7231\u597d\u3002<\/p>\n\n\n\n
INSERT INTO user_info (username, height, weight, birthdate, hobbies) VALUES\n('Alice', 160.5, 55.0, '1990-01-01', 'Reading, Traveling, Cooking'),\n('Bob', 175.0, 70.0, '1985-02-15', 'Sports, Music, Hiking'),\n('Charlie', 180.2, 85.3, '1992-03-10', 'Gaming, Fishing, Swimming'),\n('David', 165.5, 60.5, '1988-04-22', 'Photography, Reading, Running'),\n('Eve', 158.3, 52.8, '1995-05-30', 'Drawing, Dancing, Traveling'),\n('Frank', 172.0, 78.0, '1987-06-14', 'Cooking, Gaming, Traveling'),\n('Grace', 168.7, 60.0, '1991-07-19', 'Music, Reading, Hiking'),\n('Hank', 185.0, 90.5, '1983-08-25', 'Sports, Photography, Cooking'),\n('Ivy', 155.2, 50.3, '1994-09-30', 'Reading, Drawing, Dancing'),\n('Jack', 170.5, 68.2, '1989-10-10', 'Gaming, Hiking, Traveling');<\/code><\/pre>\n\n\n\n
\u6700\u7ec8\u5b8c\u6574\u7684 SQL \u4ee3\u7801<\/h3>\n\n\n\n
CREATE TABLE user_info (\n    id INT AUTO_INCREMENT PRIMARY KEY,\n    username VARCHAR(255) NOT NULL,\n    height DECIMAL(5,2) NOT NULL,\n    weight DECIMAL(5,2) NOT NULL,\n    birthdate DATE NOT NULL,\n    hobbies TEXT\n) ENGINE=InnoDB;\n\nINSERT INTO user_info (username, height, weight, birthdate, hobbies) VALUES\n('Alice', 160.5, 55.0, '1990-01-01', 'Reading, Traveling, Cooking'),\n('Bob', 175.0, 70.0, '1985-02-15', 'Sports, Music, Hiking'),\n('Charlie', 180.2, 85.3, '1992-03-10', 'Gaming, Fishing, Swimming'),\n('David', 165.5, 60.5, '1988-04-22', 'Photography, Reading, Running'),\n('Eve', 158.3, 52.8, '1995-05-30', 'Drawing, Dancing, Traveling'),\n('Frank', 172.0, 78.0, '1987-06-14', 'Cooking, Gaming, Traveling'),\n('Grace', 168.7, 60.0, '1991-07-19', 'Music, Reading, Hiking'),\n('Hank', 185.0, 90.5, '1983-08-25', 'Sports, Photography, Cooking'),\n('Ivy', 155.2, 50.3, '1994-09-30', 'Reading, Drawing, Dancing'),\n('Jack', 170.5, 68.2, '1989-10-10', 'Gaming, Hiking, Traveling');<\/code><\/pre>\n\n\n\n
\u9a8c\u8bc1\u6570\u636e\u63d2\u5165<\/h3>\n\n\n\n
\u8fd0\u884c\u4ee5\u4e0b\u67e5\u8be2\u4ee5\u9a8c\u8bc1\u63d2\u5165\u7684\u6570\u636e\uff1a<\/p>\n\n\n\n
SELECT * FROM user_info;<\/code><\/pre>\n\n\n\n
\"\"<\/div><\/figure>\n\n\n\n
\u63d2\u5165 Tom \u7684\u8bb0\u5f55\uff08\u5982\u679c\u6570\u636e\u5e93\u4e2d\u6ca1\u6709\uff09<\/h3>\n\n\n\n
INSERT INTO user_info (username, height, weight, birthdate, hobbies) VALUES\n('Tom', 175.5, 70.0, '1995-08-20', 'Reading, Traveling');<\/code><\/pre>\n\n\n\n
\u7ec4\u5408\u67e5\u8be2<\/h3>\n\n\n\n
\u67e5\u51fa\u7528\u6237\u540d\u4e3a Tom \u7684\u8bb0\u5f55<\/h3>\n\n\n\n
\u4e3a\u4e86\u67e5\u51fa\u7528\u6237\u540d\u4e3a Tom \u7684\u8bb0\u5f55\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b SQL \u67e5\u8be2\uff1a<\/p>\n\n\n\n
SELECT * FROM user_info WHERE username = 'Tom';<\/code><\/pre>\n\n\n\n
\"\"<\/div><\/figure>\n\n\n\n
\u67e5\u51fa\u5e74\u9f84\u5728 18 \u4e0e 30 \u4e4b\u95f4\u7684\u7528\u6237\u4fe1\u606f<\/h3>\n\n\n\n
\u7531\u4e8e\u6570\u636e\u5e93\u4e2d\u6ca1\u6709\u76f4\u63a5\u5b58\u50a8\u7528\u6237\u5e74\u9f84\u7684\u4fe1\u606f\uff0c\u800c\u662f\u5b58\u50a8\u4e86\u51fa\u751f\u65e5\u671f\uff0c\u6211\u4eec\u9700\u8981\u6839\u636e\u5f53\u524d\u65e5\u671f\u8ba1\u7b97\u7528\u6237\u7684\u5e74\u9f84\u3002\u5047\u8bbe\u5f53\u524d\u65e5\u671f\u4e3a 2024-06-14\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u67e5\u8be2\u6765\u67e5\u627e\u5e74\u9f84\u5728 18 \u4e0e 30 \u4e4b\u95f4\u7684\u7528\u6237\u4fe1\u606f\uff1a<\/p>\n\n\n\n
SELECT *,\n       TIMESTAMPDIFF(YEAR, birthdate, CURDATE()) AS age\nFROM user_info\nHAVING age BETWEEN 18 AND 30;<\/code><\/pre>\n\n\n\n
\"\"<\/div><\/figure>\n\n\n\n
\u5b9e\u9a8c\u4e8c\u3001\u521b\u5efa\u4e00\u4e2a\u8bfe\u7a0b\u8868\u6765\u5b58\u50a8\u8bfe\u7a0b\u4fe1\u606f\uff0c\u5305\u62ec\u8bfe\u7a0b\u540d\u3001\u6388\u8bfe\u8001\u5e08\u540d\u3001\u6388\u8bfe\u8001\u5e08\u7ea7\u522b\u3001\u6388\u8bfe\u8001\u5e08\u5e74\u9f84\u548c\u6388\u8bfe\u8001\u5e08\u6027\u522b\uff0c\u5e76\u63d2\u51655\u6761\u8bfe\u7a0b\u4fe1\u606f\u3002<\/h2>\n\n\n\n
1. \u521b\u5efa\u8bfe\u7a0b\u8868<\/h3>\n\n\n\n
\u9996\u5148\uff0c\u521b\u5efa\u4e00\u4e2a\u540d\u4e3a course_info<\/code> \u7684\u8868\uff1a<\/p>\n\n\n\n
CREATE TABLE course_info (\n    course_id INT AUTO_INCREMENT PRIMARY KEY,\n    course_name VARCHAR(255) NOT NULL,\n    teacher_name VARCHAR(255) NOT NULL,\n    teacher_level VARCHAR(255) NOT NULL,\n    teacher_age INT NOT NULL,\n    teacher_gender ENUM('Male', 'Female') NOT NULL\n) ENGINE=InnoDB;<\/code><\/pre>\n\n\n\n
2. \u63d2\u51655\u6761\u8bfe\u7a0b\u4fe1\u606f<\/h3>\n\n\n\n
\u63a5\u4e0b\u6765\uff0c\u63d2\u51655\u6761\u8bfe\u7a0b\u4fe1\u606f\uff1a<\/p>\n\n\n\n
INSERT INTO course_info (course_name, teacher_name, teacher_level, teacher_age, teacher_gender) VALUES\n('Mathematics', 'John Doe', 'Senior', 45, 'Male'),\n('Physics', 'Jane Smith', 'Intermediate', 38, 'Female'),\n('Chemistry', 'Alice Johnson', 'Senior', 50, 'Female'),\n('Biology', 'Robert Brown', 'Junior', 30, 'Male'),\n('History', 'Emily Davis', 'Intermediate', 40, 'Female');<\/code><\/pre>\n\n\n\n
\u6700\u7ec8\u5b8c\u6574\u7684 SQL \u4ee3\u7801<\/h3>\n\n\n\n
\u4ee5\u4e0b\u662f\u521b\u5efa\u8868\u548c\u63d2\u5165\u6570\u636e\u7684\u5b8c\u6574 SQL \u4ee3\u7801\uff1a<\/p>\n\n\n\n
CREATE TABLE course_info (\n    course_id INT AUTO_INCREMENT PRIMARY KEY,\n    course_name VARCHAR(255) NOT NULL,\n    teacher_name VARCHAR(255) NOT NULL,\n    teacher_level VARCHAR(255) NOT NULL,\n    teacher_age INT NOT NULL,\n    teacher_gender ENUM('Male', 'Female') NOT NULL\n) ENGINE=InnoDB;\n\nINSERT INTO course_info (course_name, teacher_name, teacher_level, teacher_age, teacher_gender) VALUES\n('Mathematics', 'John Doe', 'Senior', 45, 'Male'),\n('Physics', 'Jane Smith', 'Intermediate', 38, 'Female'),\n('Chemistry', 'Alice Johnson', 'Senior', 50, 'Female'),\n('Biology', 'Robert Brown', 'Junior', 30, 'Male'),\n('History', 'Emily Davis', 'Intermediate', 40, 'Female');<\/code><\/pre>\n\n\n\n
3. \u9a8c\u8bc1\u6570\u636e\u63d2\u5165<\/h3>\n\n\n\n
\u8fd0\u884c\u4ee5\u4e0b\u67e5\u8be2\u4ee5\u9a8c\u8bc1\u63d2\u5165\u7684\u6570\u636e\uff1a<\/p>\n\n\n\n
SELECT * FROM course_info;<\/code><\/pre>\n\n\n\n
\"\"<\/div><\/figure>\n\n\n\n
\u5b9e\u9a8c\u4e8c\u4f18\u5316<\/h2>\n\n\n\n
\u53ef\u80fd\u5b58\u5728\u540c\u4e00\u4e2a\u8001\u5e08\u6559\u6388\u591a\u95e8\u8bfe\u7a0b\u7684\u60c5\u51b5\uff0c\u53ef\u4ee5\u901a\u8fc7\u5c06\u8001\u5e08\u7684\u4fe1\u606f\u5b58\u50a8\u5728\u5355\u72ec\u7684\u8868\u4e2d\uff0c\u7136\u540e\u5728\u8bfe\u7a0b\u8868\u4e2d\u5f15\u7528\u8001\u5e08\u7684ID\u6765\u8fdb\u884c\u4f18\u5316\u3002\u8fd9\u79cd\u65b9\u5f0f\u907f\u514d\u4e86\u5197\u4f59\u6570\u636e\uff0c\u63d0\u9ad8\u4e86\u6570\u636e\u7684\u4e00\u81f4\u6027\u548c\u7ba1\u7406\u7684\u4fbf\u6377\u6027\u3002<\/p>\n\n\n\n
\u4f18\u5316\u540e\u7684\u8868\u7ed3\u6784<\/h3>\n\n\n\n
\u5148\u628a\u8001\u7684course_info\u8868\u5220\u9664\uff0c\u7136\u540e\u521b\u5efa\u4e24\u4e2a\u8868\uff1a\u4e00\u4e2a\u7528\u4e8e\u5b58\u50a8\u8001\u5e08\u4fe1\u606f (teacher_info<\/code>)\uff0c\u53e6\u4e00\u4e2a\u7528\u4e8e\u5b58\u50a8\u8bfe\u7a0b\u4fe1\u606f (course_info<\/code>)\u3002<\/p>\n\n\n\n
1. \u521b\u5efa\u8001\u5e08\u4fe1\u606f\u8868<\/h3>\n\n\n\n
CREATE TABLE teacher_info (\n    teacher_id INT AUTO_INCREMENT PRIMARY KEY,\n    teacher_name VARCHAR(255) NOT NULL,\n    teacher_level VARCHAR(255) NOT NULL,\n    teacher_age INT NOT NULL,\n    teacher_gender ENUM('Male', 'Female') NOT NULL\n) ENGINE=InnoDB;<\/code><\/pre>\n\n\n\n
2. \u521b\u5efa\u8bfe\u7a0b\u4fe1\u606f\u8868<\/h3>\n\n\n\n
CREATE TABLE course_info (\n    course_id INT AUTO_INCREMENT PRIMARY KEY,\n    course_name VARCHAR(255) NOT NULL,\n    teacher_id INT,\n    FOREIGN KEY (teacher_id) REFERENCES teacher_info(teacher_id)\n) ENGINE=InnoDB;<\/code><\/pre>\n\n\n\n
3. \u63d2\u5165\u8001\u5e08\u4fe1\u606f<\/h3>\n\n\n\n
\u9996\u5148\u63d2\u5165\u8001\u5e08\u7684\u4fe1\u606f\uff1a<\/p>\n\n\n\n
INSERT INTO teacher_info (teacher_name, teacher_level, teacher_age, teacher_gender) VALUES\n('John Doe', 'Senior', 45, 'Male'),\n('Jane Smith', 'Intermediate', 38, 'Female'),\n('Alice Johnson', 'Senior', 50, 'Female'),\n('Robert Brown', 'Junior', 30, 'Male'),\n('Emily Davis', 'Intermediate', 40, 'Female');<\/code><\/pre>\n\n\n\n
4. \u63d2\u5165\u8bfe\u7a0b\u4fe1\u606f<\/h3>\n\n\n\n
\u63a5\u4e0b\u6765\uff0c\u63d2\u5165\u8bfe\u7a0b\u4fe1\u606f\uff0c\u5e76\u5f15\u7528\u76f8\u5e94\u7684\u8001\u5e08ID\uff1a<\/p>\n\n\n\n
INSERT INTO course_info (course_name, teacher_id) VALUES\n('Mathematics', 1),\n('Advanced Mathematics', 1),\n('Physics', 2),\n('Chemistry', 3),\n('Biology', 4),\n('History', 5),\n('Modern History', 5);<\/code><\/pre>\n\n\n\n
\u6700\u7ec8\u5b8c\u6574\u7684 SQL \u4ee3\u7801<\/h3>\n\n\n\n
\u4ee5\u4e0b\u662f\u521b\u5efa\u8868\u548c\u63d2\u5165\u6570\u636e\u7684\u5b8c\u6574 SQL \u4ee3\u7801\uff1a<\/p>\n\n\n\n
-- \u521b\u5efa\u8001\u5e08\u4fe1\u606f\u8868\nCREATE TABLE teacher_info (\n    teacher_id INT AUTO_INCREMENT PRIMARY KEY,\n    teacher_name VARCHAR(255) NOT NULL,\n    teacher_level VARCHAR(255) NOT NULL,\n    teacher_age INT NOT NULL,\n    teacher_gender ENUM('Male', 'Female') NOT NULL\n) ENGINE=InnoDB;\n\n-- \u521b\u5efa\u8bfe\u7a0b\u4fe1\u606f\u8868\nCREATE TABLE course_info (\n    course_id INT AUTO_INCREMENT PRIMARY KEY,\n    course_name VARCHAR(255) NOT NULL,\n    teacher_id INT,\n    FOREIGN KEY (teacher_id) REFERENCES teacher_info(teacher_id)\n) ENGINE=InnoDB;\n\n-- \u63d2\u5165\u8001\u5e08\u4fe1\u606f\nINSERT INTO teacher_info (teacher_name, teacher_level, teacher_age, teacher_gender) VALUES\n('John Doe', 'Senior', 45, 'Male'),\n('Jane Smith', 'Intermediate', 38, 'Female'),\n('Alice Johnson', 'Senior', 50, 'Female'),\n('Robert Brown', 'Junior', 30, 'Male'),\n('Emily Davis', 'Intermediate', 40, 'Female');\n\n-- \u63d2\u5165\u8bfe\u7a0b\u4fe1\u606f\nINSERT INTO course_info (course_name, teacher_id) VALUES\n('Mathematics', 1),\n('Advanced Mathematics', 1),\n('Physics', 2),\n('Chemistry', 3),\n('Biology', 4),\n('History', 5),\n('Modern History', 5);<\/code><\/pre>\n\n\n\n
5. \u9a8c\u8bc1\u6570\u636e\u63d2\u5165<\/h3>\n\n\n\n
\u8fd0\u884c\u4ee5\u4e0b\u67e5\u8be2\u4ee5\u9a8c\u8bc1\u63d2\u5165\u7684\u6570\u636e\uff1a<\/p>\n\n\n\n
\u9a8c\u8bc1\u8001\u5e08\u4fe1\u606f<\/h4>\n\n\n\n
SELECT * FROM teacher_info;<\/code><\/pre>\n\n\n\n
\"\"<\/div><\/figure>\n\n\n\n
\u9a8c\u8bc1\u8bfe\u7a0b\u4fe1\u606f<\/h4>\n\n\n\n
SELECT c.course_id, c.course_name, t.teacher_name, t.teacher_level, t.teacher_age, t.teacher_gender\nFROM course_info c\nJOIN teacher_info t ON c.teacher_id = t.teacher_id;<\/code><\/pre>\n\n\n\n
\"\"<\/div><\/figure>\n\n\n\n
\u901a\u8fc7\u8fd9\u79cd\u4f18\u5316\u65b9\u5f0f\uff0c\u53ef\u4ee5\u51cf\u5c11\u6570\u636e\u5197\u4f59\uff0c\u5e76\u66f4\u6709\u6548\u5730\u7ba1\u7406\u8001\u5e08\u548c\u8bfe\u7a0b\u4e4b\u95f4\u7684\u5173\u7cfb\u3002\u5982\u679c\u9700\u8981\u66f4\u65b0\u67d0\u4e2a\u8001\u5e08\u7684\u4fe1\u606f\uff0c\u53ea\u9700\u5728 teacher_info<\/code> \u8868\u4e2d\u66f4\u65b0\u4e00\u6b21\uff0c\u800c\u65e0\u9700\u5728\u6bcf\u4e2a\u76f8\u5173\u8bfe\u7a0b\u8bb0\u5f55\u4e2d\u91cd\u590d\u66f4\u65b0\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5b9e\u9a8c\u4e00\uff1a\u521b\u5efa\u4e00\u4e2a\u5305\u542b\u7528\u6237\u540d\u3001\u8eab\u9ad8\u3001\u4f53\u91cd\u3001\u51fa\u751f\u65e5\u671f\u548c\u591a\u4e2a\u7231\u597d\u7684\u7528\u6237\u4fe1\u606f\u8868\uff0c\u5e76\u63d2\u516510\u4e2a\u7528\u6237\u4fe1\u606f\uff0c\u8981\u6c42id\u53f7\u662f\u81ea\u52a8 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16,8],"tags":[10],"class_list":["post-164","post","type-post","status-publish","format-standard","hentry","category-mysql_basic_management","category-mysql","tag-mysql_lab"],"_links":{"self":[{"href":"https:\/\/zhaoyanqi.cn\/index.php?rest_route=\/wp\/v2\/posts\/164","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/zhaoyanqi.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/zhaoyanqi.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/zhaoyanqi.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/zhaoyanqi.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=164"}],"version-history":[{"count":2,"href":"https:\/\/zhaoyanqi.cn\/index.php?rest_route=\/wp\/v2\/posts\/164\/revisions"}],"predecessor-version":[{"id":271,"href":"https:\/\/zhaoyanqi.cn\/index.php?rest_route=\/wp\/v2\/posts\/164\/revisions\/271"}],"wp:attachment":[{"href":"https:\/\/zhaoyanqi.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=164"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/zhaoyanqi.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=164"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/zhaoyanqi.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=164"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}