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SQL/MySQL

MYSQL 기본

by SyuMay 2022. 9. 14.
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MYSQL

MySQL은 데이터베이스 소프트웨어입니다. 일반적으로 데이터를 추가나 검색, 추출하는 기능을 모두 포함해서 데이터베이스라고 합니다.

MySQL은 세계에서 가장 많이 쓰이는 오픈 소스의 관계형 데이터베이스 관리시스템(RDBMS)입니다. MySQL은 PHP 스크립트 언어와 상호 연동이 잘 되면서 오픈소스를 개발된 무료 프로그램입니다. 그래서 홈페이지나 쇼핑물(워드프로세스, cafe24, 제로보드, 그누보드)등 일반적으로 웹 개발에 널리 사용하고 있습니다.

MySQL 설치

MAMP란 웹사이트를 개발할 때 쓰이는 기술 스택인 maxOS, Apache, MySQL,PHP의 약어이자 솔루션 스택이다.
https://www.mamp.info/en/downloads/

MySQL 실행

윈도우 : cd MAMP/bin/mysql/bin
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.

MAC : cd Application/MAMP/bin/mysql/bin
로그인 : ./mysql -uroot -proot 

webstoryboyhwang@Webstoryboyui-MacBookPro 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 188
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;

mysql> CREATE DATABASE sample01;
Query OK, 1 row affected (0.00 sec)

데이터베이스 보기

SHOW DATABASEs;

mysql> SHOW DATABASEs ;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| performance_schema |
| sample01           |
| sys                |
+--------------------+
5 rows in set (0.00 sec)

데이터베이스 사용

USE 데이터베이스이름;

mysql> USE sample01;
Database changed

데이터베이스 삭제

DROP 데이터베이스이름;

mysql> DROP DATABASE sample02;
Query OK, 0 rows affected (0.00 sec)

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,
    regTime int(20) NOT NULL,
    PRIMARY KEY (myMemberID)
) charset=utf8;
Query OK, 0 rows affected (0.03 sec)

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;
Query OK, 0 rows affected (0.01 sec)

테이블 복사

CREATE TABLE IF NOT EXISTS 복사 테이블 LIKE 원본 테이블;

CREATE TABLE IF NOT EXISTS member2 LIKE member;
Query OK, 0 rows affected (0.02 sec)

SHOW TABLES;
+--------------------+
| Tables_in_sample01 |
+--------------------+
| member             |
| member2            |
+--------------------+
2 rows in set (0.00 sec)

테이블 데이터

데이터 입력하기

INSERT INTO 테이블이름(필드명) VALUE(데이터)

INSERT INTO member(youEmail, youName, youPass, youBirth, regTime) VALUES('webstoryboy@naver.com','황상연','1234','19990303','1234567');
                            
INSERT INTO member(youEmail, youName, youPass, youBirth, regTime) VALUES('***@naver.com', ''***',', '1234', '19970415', '1234567');
Query OK, 1 row affected (0.00 sec)
INSERT INTO member(youEmail, youName, youPass, youBirth, regTime) VALUES('***@naver.com', ''***',', '1234', '19970530', '1234567');
Query OK, 1 row affected (0.00 sec)
INSERT INTO member(youEmail, youName, youPass, youBirth, regTime) VALUES('***@naver.com', '김석'***',준', '1234', '19941009', '1234567');
Query OK, 1 row affected (0.00 sec)
INSERT INTO member(youEmail, youName, youPass, youBirth, regTime) VALUES('***@naver.com', ''***',', '1234', '19990303', '1234567');
Query OK, 1 row affected (0.00 sec)
INSERT INTO member(youEmail, youName, youPass, youBirth, regTime) VALUES('***@naver.com',''***',','1234','19970205','1234567');
Query OK, 1 row affected (0.00 sec)
INSERT INTO member(youEmail, youName, youPass, youBirth, regTime) VALUES('***@naver.com',''***',','1234','19990303','1234567');
Query OK, 1 row affected (0.00 sec)
INSERT INTO member(youEmail, youName, youPass, youBirth, regTime) VALUES('***@naver.com', ''***',', '1234', '19970809', '04');
Query OK, 1 row affected (0.00 sec)
INSERT INTO member(youEmail, youName, youPass, youBirth, regTime) VALUES('***@naver.com',''***',','1234','19990303','1234567');
Query OK, 1 row affected (0.00 sec)
INSERT INTO member(youEmail, youName, youPass, youBirth, regTime) VALUES('***@gmail.com', ''***',', '1234', '19990303', '1234567');
Query OK, 1 row affected (0.00 sec)
INSERT INTO member(youEmail, youName, youPass, youBirth, regTime) VALUES('***@gmail.com', ''***',', '1234', '19990303', '1234567');
Query OK, 1 row affected (0.00 sec)
INSERT INTO member(youEmail, youName, youPass, youBirth, regTime) VALUES('***@naver.com',''***',','1234','19960530','1234567');
Query OK, 1 row affected (0.00 sec)
INSERT INTO member(youEmail, youName, youPass, youBirth, regTime) VALUES('***@gmail.com',''***',','1234','19971007','1234567');
Query OK, 1 row affected (0.00 sec)
INSERT INTO member(youEmail, youName, youPass, youBirth, regTime) VALUES('***@gmail.com',''***',','1234','19960331','1234567');
Query OK, 1 row affected (0.00 sec)
INSERT INTO member(youEmail, youName, youPass, youBirth, regTime) VALUES('***@gmail.com',''***',','1234','19990303','1234567');
Query OK, 1 row affected (0.00 sec)
INSERT INTO member(youEmail, youName, youPass, youBirth, regTime) VALUES('***@gmail.com', ''***',', '1234', '19981010', '1234567');
Query OK, 1 row affected (0.00 sec)
INSERT INTO member(youEmail, youName, youPass, youBirth, regTime) VALUE('***@gmail.com', ''***',', '1234', '19700101', '1234567');
Query OK, 1 row affected (0.00 sec)
INSERT INTO member(youEmail, youName, youPass, youBirth, regTime) VALUES('***@gmail.com', ''***',', '1234', '19990303', '1234567');
Query OK, 1 row affected (0.00 sec)
INSERT INTO member(youEmail, youName, youPass, youBirth, regTime) VALUES('***@gmail.com',''***',','1234','19970731','1234567');
Query OK, 1 row affected (0.00 sec)

전체 데이터 불러오기

SELECT * FROM 테이블 이름;

SELECT * FROM member;
+------------+--------------------------+-----------+---------+----------+---------+
| myMemberID | youEmail                 | youName   | youPass | youBirth | regTime |
+------------+--------------------------+-----------+---------+----------+---------+
|          1 | ***@naver.com            | ***       | 1234    | 19990303 | 1234567 |
|          2 | ***@naver.com            | ***       | 1234    | 19970415 | 1234567 |
|          3 | ***@naver.com            | ***       | 1234    | 19970530 | 1234567 |
|          4 | ***@naver.com            | ***       | 1234    | 19941009 | 1234567 |
|          5 | ***@naver.com            | ***       | 1234    | 19990303 | 1234567 |
|          6 | ***@naver.com            | ***       | 1234    | 19970205 | 1234567 |
|          7 | ***@naver.com            | ***       | 1234    | 19990303 | 1234567 |
|          8 | ***@naver.com            | ***       | 1234    | 19970809 |       4 |
|          9 | ***@naver.com            | ***       | 1234    | 19990303 | 1234567 |
|         10 | ***@gmail.com            | ***       | 1234    | 19990303 | 1234567 |
|         11 | ***@gmail.com            | ***       | 1234    | 19990303 | 1234567 |
|         12 | ***@naver.com            | ***       | 1234    | 19960530 | 1234567 |
|         13 | ***@gmail.com            | ***       | 1234    | 19971007 | 1234567 |
|         14 | ***@gmail.com            | ***       | 1234    | 19960331 | 1234567 |
|         15 | ***@gmail.com            | ***       | 1234    | 19990303 | 1234567 |
|         16 | ***@gmail.com            | ***       | 1234    | 19981010 | 1234567 |
|         17 | ***@gmail.com            | ***       | 1234    | 19700101 | 1234567 |
|         18 | ***@gmail.com            | ***       | 1234    | 19990303 | 1234567 |
|         19 | ***@gmail.com            | ***       | 1234    | 19970731 | 1234567 |
+------------+--------------------------+-----------+---------+----------+---------+
19 rows in set (0.00 sec)

ID가 6일경우

SELECT * FROM 테이블 이름 WHERE 조건;

SELECT * FROM member WHERE myMemberID = 6;
+------------+---------------------+-----------+---------+----------+---------+
| myMemberID | youEmail            | youName   | youPass | youBirth | regTime |
+------------+---------------------+-----------+---------+----------+---------+
|          6 | ***@naver.com       | ***       | 1234    | 19970205 | 1234567 |
+------------+---------------------+-----------+---------+----------+---------+
1 row in set (0.00 sec)

naver 메일을 사용하는 사람

SELECT * FROM 테이블 이름 WHERE 조건;

SELECT * FROM member WHERE youEmail LIKE "%naver%";
+------------+------------------------+-----------+---------+----------+---------+
| myMemberID | youEmail               | youName   | youPass | youBirth | regTime |
+------------+------------------------+-----------+---------+----------+---------+
|          1 | ***@naver.com          | ***       | 1234    | 19990303 | 1234567 |
|          2 | ***@naver.com          | ***       | 1234    | 19970415 | 1234567 |
|          3 | ***@naver.com          | ***       | 1234    | 19970530 | 1234567 |
|          4 | ***@naver.com          | ***       | 1234    | 19941009 | 1234567 |
|          5 | ***@naver.com          | ***       | 1234    | 19990303 | 1234567 |
|          6 | ***@naver.com          | ***       | 1234    | 19970205 | 1234567 |
|          7 | ***@naver.com          | ***       | 1234    | 19990303 | 1234567 |
|          8 | ***@naver.com          | ***       | 1234    | 19970809 |       4 |
|          9 | ***@naver.com          | ***       | 1234    | 19990303 | 1234567 |
|         12 | ***@naver.com          | ***       | 1234    | 19960530 | 1234567 |
+------------+------------------------+-----------+---------+----------+---------+
10 rows in set (0.00 sec)

데이터 수정하기

ARTER TABLE 테이블 이름;

데이터 삭제하기

DELETE TABLE 테이블 이름 WHERE 조건;
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