MySQL은 데이터베이스 소프트웨어입니다. 일반적으로 데이터를 추가하거나 검색, 추출하는 기능을 모두 포함해서 데이터베이스라 칭합니다.
MySQL은 세계에서 가장 많이 쓰이는 오픈 소스의 관계형 데이터베이스 관리시스템(RDBMS)입니다. MySQL은 PHP 스크립트 언어와 상호 연동이 잘 되면서 오픈소스를 개발된 무료 프로그램 입니다. 그래서 홈페이지나 쇼핑몰(워드프레스, cafe24, 제로보드, 그누보드)등 일반적으로 웹 개발에 널리 사용되고 있습니다.
터미널 실행 후 윈도우는 dir 맥은 ls를 치고 엔터를 누른 후 밑에 경로와 로그인을
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 4
Server version: 5.7.24 MySQL Community Server (GPL)
Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql: [Warning] Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 377
Server version: 5.7.34 MySQL Community Server (GPL)
Copyright (c) 2000, 2021, Oracle and/or its affiliates.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
create database sample01;
Query OK, 1 row affected (0.00 sec)
create database sample02;
Query OK, 1 row affected (0.00 sec)
//추가 전
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| sys |
+--------------------+
4 rows in set (0.03 sec)
//추가 후
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| sample01 |
| sample02 |
| sys |
+--------------------+
6 rows in set (0.01 sec)
mysql> use sample01;
Database changed
mysql> drop database sample02;
Query OK, 0 rows affected (0.02 sec)
mysql> create table member (
myMemberID int(10) unsigned auto_increment, //변수 설정과 비슷
youEmail varchar(40) NOT NULL,
youName varchar(20) NOT NULL,
youPass varchar(20) NOT NULL,
youBirth int(20) NOT NULL,
regTime int(20) NOT NULL,
PRIMARY KEY (myMemberID)
) charset=utf8; //한글은 깨지므로 언어 설정해주기
create table member (
myMemberID int(10) unsigned auto_increment,
youEmail varchar(40) NOT NULL,
youName varchar(20) NOT NULL,
youPass varchar(20) NOT NULL,
youBirth int(20) NOT NULL,
youAge int(5) NOT NULL,
regTime int(20) NOT NULL,
PRIMARY KEY (myMemberID)
) charset=utf8;
mysql> show tables;
+--------------------+
| Tables_in_sample01 |
+--------------------+
| member |
+--------------------+
1 row in set (0.00 sec)
mysql> desc member;
+------------+------------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+------------+------------------+------+-----+---------+----------------+
| myMemberID | int(10) unsigned | NO | PRI | NULL | auto_increment |
| youEmail | varchar(40) | NO | | NULL | |
| youName | varchar(20) | NO | | NULL | |
| youPass | varchar(20) | NO | | NULL | |
| youBirth | int(20) | NO | | NULL | |
| regTime | int(20) | NO | | NULL | |
+------------+------------------+------+-----+---------+----------------+
6 rows in set (0.01 sec)
mysql> drop table member;
Query OK, 0 rows affected (0.03 sec)
CREATE TABLE member3 SELECT * FROM member;
INSERT INTO member(youEmail, youName, youPass, youBirth, youAge, regTime) VALUES('webstoryboy@naver.com','황상연','1234','19990303', '45', '1234567');
INSERT INTO member(youEmail, youName, youPass, youBirth, youAge, regTime) VALUES('praise1109@gmail.com', '이하은', '1234', '19990303', '25', '1234567');
INSERT INTO member(youEmail, youName, youPass, youBirth, youAge, regTime) VALUES('thdtjdgml415@naver.com', '송성희', '1234', '19970415', '25', '1234567');
INSERT INTO member(youEmail, youName, youPass, youBirth, youAge, regTime) VALUES('mo0647@naver.com', '김민정', '1234', '19970530', '25', '1234567');
INSERT INTO member(youEmail, youName, youPass, youBirth, youAge, regTime) VALUES('tjrwnsrkdtj@naver.com', '김석준', '1234', '19941009', '25', '1234567');
INSERT INTO member(youEmail, youName, youPass, youBirth, youAge, regTime) VALUES('jwor124@naver.com', '정은비', '1234', '19990303', '25', '1234567');
INSERT INTO member(youEmail, youName, youPass, youBirth, youAge, regTime) VALUES('leesh3432@naver.com','이영환','1234','19970205', '25', '1234567');
INSERT INTO member(youEmail, youName, youPass, youBirth, youAge, regTime) VALUES('sshin4882@naver.com','박현신','1234','19990303', '25', '1234567');
INSERT INTO member(youEmail, youName, youPass, youBirth, youAge, regTime) VALUES('to_before@naver.com', '김상준', '1234', '19970809', '25', '04');
INSERT INTO member(youEmail, youName, youPass, youBirth, youAge, regTime) VALUES('kkb7528@naver.com','권규비','1234','19990303','25', '1234567');
INSERT INTO member(youEmail, youName, youPass, youBirth, youAge, regTime) VALUES('piowm123@gmail.com', '문병내', '1234', '19990303', '25', '1234567');
INSERT INTO member(youEmail, youName, youPass, youBirth, youAge, regTime) VALUES('ghkddbwls96@gmail.com', '황유진', '1234', '19990303', '25', '1234567');
INSERT INTO member(youEmail, youName, youPass, youBirth, youAge, regTime) VALUES('eodnjs9605@naver.com','김대원','1234','19960530', '25', '1234567');
INSERT INTO member(youEmail, youName, youPass, youBirth, youAge, regTime) VALUES('wjsqhdus971007@gmail.com','전보연','1234','19971007', '25', '1234567');
INSERT INTO member(youEmail, youName, youPass, youBirth, youAge, regTime) VALUES('noeyheyh@gmail.com','권혜현','1234','19960331', '25', '1234567');
INSERT INTO member(youEmail, youName, youPass, youBirth, youAge, regTime) VALUES('hjkang306@gmail.com','강현지','1234','19990303', '25', '1234567');
INSERT INTO member(youEmail, youName, youPass, youBirth, youAge, regTime) VALUES('sunhey9810@gmail.com', '박선혜', '1234', '19981010', '25', '1234567');
INSERT INTO member(youEmail, youName, youPass, youBirth, youAge, regTime) VALUE('kde66034@gmail.com', '김동언', '1234', '19700101', '25', '1234567');
INSERT INTO member(youEmail, youName, youPass, youBirth, youAge, regTime) VALUES('kimlh3743@gmail.com', '김이형', '1234', '20011009', '25', '1234567');
mysql> SELECT * FROM member;
+------------+--------------------------+------------+---------+----------+---------+
| myMemberID | youEmail | youName | youPass | youBirth | regTime |
+------------+--------------------------+------------+---------+----------+---------+
| 1 | praise1109@gmail.com | 이하은 | 1234 | 19990303 | 1234567 |
| 2 | webstoryboy@naver.com | 황상연 | 1234 | 19990303 | 1234567 |
| 3 | thdtjdgml415@naver.com | 송성희 | 1234 | 19970415 | 1234567 |
| 4 | mo0647@naver.com | 김민정 | 1234 | 19970530 | 1234567 |
| 5 | tjrwnsrkdtj@naver.com | 김석준 | 1234 | 19941009 | 1234567 |
| 6 | jwor124@naver.com | 정은 비 | 1234 | 19990303 | 1234567 |
| 7 | leesh3432@naver.com | 이영환 | 1234 | 19970205 | 1234567 |
| 8 | kkk5993@naver.com | 김성현 | 1234 | 19960617 | 1234567 |
| 9 | sshin4882@naver.com | 박현신 | 1234 | 19990303 | 1234567 |
| 10 | to_before@naver.com | 김상준 | 1234 | 19970809 | 4 |
| 11 | kkb7528@naver.com | 권규비 | 1234 | 19990303 | 1234567 |
| 12 | piowm123@gmail.com | 문병내 | 1234 | 19990303 | 1234567 |
| 13 | ghkddbwls96@gmail.com | 황유진 | 1234 | 19990303 | 1234567 |
| 14 | eodnjs9605@naver.com | 김대원 | 1234 | 19960530 | 1234567 |
| 15 | wjsqhdus971007@gmail.com | 전보연 | 1234 | 19971007 | 1234567 |
| 16 | noeyheyh@gmail.com | 권혜현 | 1234 | 19960331 | 1234567 |
| 17 | hjkang306@gmail.com | 강현지 | 1234 | 19990303 | 1234567 |
| 18 | sunhey9810@gmail.com | 박선혜 | 1234 | 19981010 | 1234567 |
| 19 | kde66034@gmail.com | 김동언 | 1234 | 19700101 | 1234567 |
| 20 | oranssy@naver.com | 최진주 | 3950 | 20010415 | 1234567 |
| 21 | kimlh3743@gmail.com | 김이형 | 1234 | 20011009 | 1234567 |
+------------+--------------------------+------------+---------+----------+---------+
21 rows in set (0.00 sec)
SELECT * FROM 테이블명 WHERE 필드명 = 불러오려는 인덱스값;
mysql> SElECT * FROM member WHERE myMemberID = 6;
+------------+-------------------+------------+---------+----------+---------+
| myMemberID | youEmail | youName | youPass | youBirth | regTime |
+------------+-------------------+------------+---------+----------+---------+
| 6 | jwor124@naver.com | 정은 비 | 1234 | 19990303 | 1234567 |
+------------+-------------------+------------+---------+----------+---------+
1 row in set (0.01 sec)
SELECT * FROM member WHERE myMemberID <>6;
SELECT * FROM member WHERE myMemberID >=5 AND myMemberID <=10;
SELECT * FROM member WHERE myMemberID BETWEEN 5 AND 10;
SELECT * FROM member WHERE myMemberID NOT BETWEEN 5 AND 10;
SELECT * FROM member WHERE myMemberID IN(1, 4, 10, 14);
SElECT * FROM 테이블명 WHERE 필드명 LIKE '%조건%'; : %는 앞 뒤로 상관없이라는 의미
mysql> SElECT * FROM member WHERE youEmail LIKE '%naver%';
+------------+------------------------+------------+---------+----------+---------+
| myMemberID | youEmail | youName | youPass | youBirth | regTime |
+------------+------------------------+------------+---------+----------+---------+
| 2 | webstoryboy@naver.com | 황상연 | 1234 | 19990303 | 1234567 |
| 3 | thdtjdgml415@naver.com | 송성희 | 1234 | 19970415 | 1234567 |
| 4 | mo0647@naver.com | 김민정 | 1234 | 19970530 | 1234567 |
| 5 | tjrwnsrkdtj@naver.com | 김석준 | 1234 | 19941009 | 1234567 |
| 6 | jwor124@naver.com | 정은 비 | 1234 | 19990303 | 1234567 |
| 7 | leesh3432@naver.com | 이영환 | 1234 | 19970205 | 1234567 |
| 8 | kkk5993@naver.com | 김성현 | 1234 | 19960617 | 1234567 |
| 9 | sshin4882@naver.com | 박현신 | 1234 | 19990303 | 1234567 |
| 10 | to_before@naver.com | 김상준 | 1234 | 19970809 | 4 |
| 11 | kkb7528@naver.com | 권규비 | 1234 | 19990303 | 1234567 |
| 14 | eodnjs9605@naver.com | 김대원 | 1234 | 19960530 | 1234567 |
| 20 | oranssy@naver.com | 최진주 | 3950 | 20010415 | 1234567 |
+------------+------------------------+------------+---------+----------+---------+
12 rows in set (0.00 sec)
SELECT * FROM member WHERE youEmail LIKE 'web%';
SELECT * FROM member WHERE youEmail LIKE '%com';
SELECT * FROM member WHERE youName LIKE '김%';
SELECT * FROM member WHERE youName LIKE '김%' OR youName LIKE '황%';
SELECT * FROM member WHERE youName LIKE '_상_';
SELECT * FROM member WHERE youName LIKE '__연';
SELECT * FROM member WHERE youName IS NULL;
SELECT * FROM member WHERE youName IS NOT NULL;
SELECT * FROM member WHERE youAge >= 18 AND youName LIKE '김__';
SELECT * FROM member WHERE youAge >= 18 OR youName LIKE '김__';
SELECT * FROM member WHERE (myMemberID = 2 OR myMemberID = 10) AND youAge >=20;
SELECT * FROM member LIMIT 5;
SELECT * FROM member LIMIT 5, 5;
SELECT youEmail * FROM member LIMIT 5
UPDATE member SET youPhone = 01000000000;
UPDATE member SET youAge = 40 WHERE myMemberID IN (7,8,9);
UPDATE member SET 변경할 필드명 = 변경값 WHERE 선택할 필드명 = 선택한 필드의 값;
UPDATE member SET youPass = "0123" WHERE myMemberID = 3;
UPDATE member SET 변경할 필드명 = 변경값 WHERE 선택할 필드명 = 선택한 필드의 값;
UPDATE member SET youPass = "1234567" WHERE myMemberID BETWEEN 5 AND 10;
UPDATE member SET youPass = "1234567" ORDER BY youPass DESC LIMIT 10;
DELETE FROM 테이블명 조건
DELETE FROM member WHERE myMemberID = 5;
DELETE FROM member WHERE youPass = '1234';
DELETE FROM member ORDER BY youName LIMIT 5;
DELETE FROM member WHERE myMemberID IN(7,9,10);
ALTER TABLE member ADD youPhone int(20) NOT NULL AFTER youAge;
ALTER TABLE member ADD youGender enum('m', 'w', 'x') default 'x' comment "남자 m, 여자 w" AFTER youPhone;
ALTER TABLE member MODIFY youAge int(10);
ALTER TABLE member DROP youGender;
create table myMember (
myMemberID int(10) unsigned auto_increment,
youEmail varchar(40) NOT NULL,
youName varchar(20) NOT NULL,
youPass varchar(20) NOT NULL,
youBirth int(20) NOT NULL,
youAge int(5) NOT NULL,
youPhone varchar(20) NOT NULL,
regTime int(20) NOT NULL,
PRIMARY KEY (myMemberID)
) charset=utf8;
create table myReview (
myReviewID int(10) unsigned auto_increment,
myMemberID int(10) unsigned,
youText tinytext NOT NULL,
regTime int(20) NOT NULL,
PRIMARY KEY (myReviewID)
) charset=utf8;
INSERT INTO myMember(youEmail, youName, youPass, youBirth, youAge, youPhone, regTime) VALUES('webstoryboy@naver.com','황상연','1234','19990303','20','01000000000','1234567');
INSERT INTO myMember(youEmail, youName, youPass, youBirth, youAge, youPhone, regTime) VALUES('thdtjdgml415@naver.com', '송성희', '1234', '19970415','20','01000000000','1234567');
INSERT INTO myMember(youEmail, youName, youPass, youBirth, youAge, youPhone, regTime) VALUES('mo0647@naver.com', '김민정', '1234', '19970530', '20','01000000000','1234567');
INSERT INTO myMember(youEmail, youName, youPass, youBirth, youAge, youPhone, regTime) VALUES('tjrwnsrkdtj@naver.com', '김석준', '1234', '19941009', '20','01000000000','1234567');
INSERT INTO myMember(youEmail, youName, youPass, youBirth, youAge, youPhone, regTime) VALUES('jwor124@naver.com', '정은비', '1234', '19990303', '20','01000000000','1234567');
INSERT INTO myReview(myMemberID, youText, regTime) VALUES("1", "정말 감사합니다. 너무 좋네요!", "1234567");
INSERT INTO myReview(myMemberID, youText, regTime) VALUES("3", "이거 별루네요~~ 사지마 너무 좋네요!", "1234567");
INSERT INTO myReview(myMemberID, youText, regTime) VALUES("2", "안녕하세요. 너무 좋네요!", "1234567");
INSERT INTO myReview(myMemberID, youText, regTime) VALUES("3", "가성비 짱. 너무 좋네요!", "1234567");
INSERT INTO myReview(myMemberID, youText, regTime) VALUES("4", "올드합니다. 너무 좋네요!", "1234567");
INSERT INTO myReview(myMemberID, youText, regTime) VALUES("5", "에잉 비추비추.... 너무 좋네요!", "1234567");
INSERT INTO myReview(myMemberID, youText, regTime) VALUES("2", "오호라 강추강추. 너무 좋네요!", "1234567");
INSERT INTO myReview(myMemberID, youText, regTime) VALUES("3", "정말 감사합니다. 너무 좋네요!", "1234567");
INSERT INTO myReview(myMemberID, youText, regTime) VALUES("4", "훌륭합니다... 너무 좋네요!", "1234567");
INSERT INTO myReview(myMemberID, youText, regTime) VALUES("5", "대박대박. 너무 좋네요!", "1234567");
SELECT m.youName, m.youEmail, r.youText, r.regTime FROM myMember m JOIN myReview r ON (m.myMemberID = r.myMemberID) ORDER BY myReviewID DESC LIMIT 5;