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MySQL
MySQL은 데이터베이스 소프트웨어입니다. 일반적으로 데이터를 추가하거나 검색, 추출하는 기능을 모두 포함해서 데이터베이스라고 부릅니다.
MySQL은 세계에서 가장 많이 쓰이는 오픈 소스의 관계형 데이터베이스 관리시스템(RDBMS)입니다. MySQL은 PHP 스크립트 언어와 상호 연동이 잘 되면서 오픈소스로 개발된 무료 프로그램입니다. 그래서 홈페이지나 쇼핑몰(워드프레스, cafe24, 제로보드, 그누보드)등 일반적으로 웹 개발에 널리 사용하고 있습니다.
MySQL 설치
MAMP란 웹사이트를 개발할 때 쓰이는 기술 스택인 macOS, Apache, MySQL, PHP 의 약어이자 솔루션 스택이다.
https://www.mamp.info/en/downloads/
MySQL 실행
윈도우 : cd MAMP/Bin/mysql/bin
로그인 : mysql -uroot -proot
로그인 : mysql -uroot -proot
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.
맥 : cd Application/mamp/Libary/bin
로그인 : sudo ./ -uroot -proot
로그인 : sudo ./ -uroot -proot
kim-yihyung@gim-ihyeong-ui-MacBookAir bin % ./mysql -uroot -proot
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 7
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.
데이터베이스
데이터베이스 만들기
create database 데이터베이스 이름;
create database sample01;
데이터베이스 보기
show databases;
show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| sample01 |
| sys |
+--------------------+
6 rows in set (0.00 sec)
데이터베이스 사용
use 데이터베이스 이름;
use sample01;
데이터베이스 삭제
drop database 데이터베이스 이름;
drop database sample02;
테이블
테이블 만들기
create table 테이블 이름;
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;
테이블 전체보기
show tables;
show tables;
+--------------------+
| Tables_in_sample01 |
+--------------------+
| member |
+--------------------+
1 row in set (0.00 sec)
테이블 보기
desc 테이블 이름;
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 (0.00 sec)
테이블 삭제
drop table 테이블 이름;
drop table member;
테이블 복사
테이블 데이터
데이터 입력하기
INSERT INTO 테이블이름(필드명) VALUE(데이터)
INSERT INTO member(youEmail, youName, youPass, youBirth, youAge, regTime) VALUES('webstoryboy@naver.com','황상연','1234','19990303','20', '1234567');
INSERT INTO member(youEmail, youName, youPass, youBirth, youAge, regTime) VALUES('thdtjdgml415@naver.com', '송성희', '1234', '19970415','20', '1234567');
INSERT INTO member(youEmail, youName, youPass, youBirth, youAge, regTime) VALUES('mo0647@naver.com', '김민정', '1234', '19970530','20', '1234567');
INSERT INTO member(youEmail, youName, youPass, youBirth, youAge, regTime) VALUES('tjrwnsrkdtj@naver.com', '김석준', '1234', '19941009','20', '1234567');
INSERT INTO member(youEmail, youName, youPass, youBirth, youAge, regTime) VALUES('jwor124@naver.com', '정은비', '1234', '19990303','20', '1234567');
INSERT INTO member(youEmail, youName, youPass, youBirth, youAge, regTime) VALUES('leesh3432@naver.com','이영환','1234','19970205','20','1234567');
INSERT INTO member(youEmail, youName, youPass, youBirth, youAge, regTime) VALUES('sshin4882@naver.com','박현신','1234','19990303','20','1234567');
INSERT INTO member(youEmail, youName, youPass, youBirth, youAge, regTime) VALUES('to_before@naver.com', '김상준', '1234', '19970809','20', '04');
INSERT INTO member(youEmail, youName, youPass, youBirth, youAge, regTime) VALUES('kkb7528@naver.com','권규비','1234','19990303','20','1234567');
INSERT INTO member(youEmail, youName, youPass, youBirth, youAge, regTime) VALUES('piowm123@gmail.com', '문병내', '1234', '19990303','20', '1234567');
INSERT INTO member(youEmail, youName, youPass, youBirth, youAge, regTime) VALUES('ghkddbwls96@gmail.com', '황유진', '1234', '19990303','20', '1234567');
INSERT INTO member(youEmail, youName, youPass, youBirth, youAge, regTime) VALUES('eodnjs9605@naver.com','김대원','1234','19960530','20','1234567');
INSERT INTO member(youEmail, youName, youPass, youBirth, youAge, regTime) VALUES('wjsqhdus971007@gmail.com','전보연','1234','19971007','20','1234567');
INSERT INTO member(youEmail, youName, youPass, youBirth, youAge, regTime) VALUES('noeyheyh@gmail.com','권혜현','1234','19960331','20','1234567');
INSERT INTO member(youEmail, youName, youPass, youBirth, youAge, regTime) VALUES('hjkang306@gmail.com','강현지','1234','19990303','20','1234567');
INSERT INTO member(youEmail, youName, youPass, youBirth, youAge, regTime) VALUES('sunhey9810@gmail.com', '박선혜', '1234', '19981010','20', '1234567');
INSERT INTO member(youEmail, youName, youPass, youBirth, youAge, regTime) VALUE('kde66034@gmail.com', '김동언', '1234', '19700101','20', '1234567');
INSERT INTO member(youEmail, youName, youPass, youBirth, youAge, regTime) VALUES('praise1109@gmail.com', '이하은', '1234', '19990303','20', '1234567');
데이터 불러오기
SELECT 필드명 FROM 테이블명 WHERE 조건
전체 데이터 불러오기
SELECT * FROM member;
+------------+--------------------------+---------+---------+----------+---------+
| myMemberID | youEmail | youName | youPass | youBirth | regTime |
+------------+--------------------------+---------+---------+----------+---------+
| 1 | kimlh3743@gmail.com | 김이형 | 1234 | 20011009 | 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 | 정은비 | 1234 | 19990303 | 1234567 |
| 7 | leesh3432@naver.com | 이영환 | 1234 | 19970205 | 1234567 |
| 8 | sshin4882@naver.com | 박현신 | 1234 | 19990303 | 1234567 |
| 9 | to_before@naver.com | 김상준 | 1234 | 19970809 | 1234567 |
| 10 | kkb7528@naver.com | 권규비 | 1234 | 19990303 | 1234567 |
| 11 | ghkddbwls96@gmail.com | 황유진 | 1234 | 19990303 | 1234567 |
| 12 | eodnjs9605@naver.com | 김대원 | 1234 | 19960530 | 1234567 |
| 13 | wjsqhdus971007@gmail.com | 전보연 | 1234 | 19971007 | 1234567 |
| 14 | noeyheyh@gmail.com | 권혜현 | 1234 | 19960331 | 1234567 |
| 15 | hjkang306@gmail.com | 강현지 | 1234 | 19990303 | 1234567 |
| 16 | sunhey9810@gmail.com | 박선혜 | 1234 | 19981010 | 1234567 |
| 17 | kde66034@gmail.com | 김동언 | 1234 | 19700101 | 1234567 |
| 18 | praise1109@gmail.com | 이하은 | 1234 | 19990303 | 1234567 |
| 19 | oranssy@naver.com | 최진주 | 3950 | 20010415 | 1234567 |
| 20 | kkk5993@naver.com | 김성현 | 1234 | 19960617 | 1234567 |
| 21 | happyham52@gmail.com | 이중호 | 1234 | 19970731 | 1234567 |
+------------+--------------------------+---------+---------+----------+---------+
21 rows in set (0.00 sec)
mymemberID가 6번인 경우
SELECT * FROM member WHERE myMemberID = 6;
mymemberID가 6번이 아닌 경우
SELECT * FROM member WHERE myMemberID <> 6;
mymemberID가 5~10인 경우
SELECT * FROM member WHERE myMemberID >=5 AND myMemberID <=10;
mymemberID가 5~10인 경우(범위 조건)
SELECT * FROM member WHERE myMemberID BETWEEN 5 AND 10;
mymemberID가 5~10이 아닌 경우(범위 조건)
SELECT * FROM member WHERE myMemberID NOT BETWEEN 5 AND 10;
mymemberID(해당 조건 불러오기)
SELECT * FROM member WHERE myMemberID IN(1,4,10,14);
email 중에 naver 텍스트를 포함하고 있는 경우
SELECT * FROM member WHERE youEmail LIKE "%naver%";
email 중에 web 텍스트로 시작하는 경우
SELECT * FROM member WHERE youEmail LIKE 'web%';
email 중에 com 텍스트로 끝나는 경우
SELECT * FROM member WHERE youEmail LIKE '%com';
데이터 수정하기
UPDATE 테이블명(필드명) SET 컬럼명 조건
휴대폰 번호 컬럼(youPhone) varchar(20)로 변경
ALTER TABLE member MODIFY youPhone varchar(20) NOT NULL;
모든 회원의 휴대폰 번호 변경
UPDATE member SET youPhone = "010-0000-0000";
데이터 삭제하기
테이블 수정
필드 추가하기
ALTER TABLE 테이블명 ADD 추가할 필드명 AFTER 필드 위치
member 테이블 나이 뒤에 핸드폰 번호 필드를 추가
ALTER TABLE member ADD youPhone int(20) NOT NULL AFTER youAge;
member 테이블 핸드폰 번호 뒤에 핸드폰 성별 필드를 추가
ALTER TABLE member ADD youGender enum('m','w','x') default 'x' comment "남자 m, 여자 w" AFTER youPhone;
필드 수정하기
ALTER TABLE 테이블명 MODIFY 수정할 필드명;
ALTER TABLE member MODIFY youAge int(10);
ALTER TABLE member MODIFY youGender enum('m', 'w');
필드 삭제하기
ALTER TABLE 테이블명 DROP 삭제할 필드명;
ALTER TABLE member DROP youGender;
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