2：数据库的基本操作-MySQL

(鐩綍)

2.1 鏁版嵁搴撶殑鏄剧ず璁茶В

• information_schema

  锛氫俊鎭浘寮忥紝瀛樺偍鏈嶅姟鍣ㄧ鐞嗘暟鎹簱鐨勪俊鎭?/li>

• mysql

  锛氬瓨鏀剧郴缁熶俊鎭紝鐢ㄦ埛鍚嶅瘑鐮佺瓑

• performance_schema

  锛氭€ц兘鍥惧紡

• sys

  锛氱郴缁熸枃浠?/li>

show databases;
           

2.2 鍒涘缓鏁版嵁搴?/h2>

1. 鍒涘缓鏁版嵁搴?/h3>

create database student;
           

2. 鍒涘缓甯︽湁鍏抽敭瀛楃殑鏁版嵁搴擄紙涓嶆帹鑽愶級

create databse

鏄叧閿瓧锛屼笉鐢ㄦ潵鍋氭暟鎹簱鍚嶏紝濡傛灉涓€瀹氳鐢ㄧ殑璇濓紝寰楀姞鍙嶅紩鍙?

create database `database`;
           

3.鍒ゆ柇骞跺垱寤轰竴涓笉鐭ラ亾鏄惁瀛樺湪鐨勬暟鎹簱

锛堜笅闈竴鏉¤鍙ユ洿鍔犺鑼冿級

create database if not exists student;
create database if not exists `student`;
           

鍦ㄥ垱寤哄瓨鍦ㄧ殑鏁版嵁搴撴椂锛屼笉浼氶€氳繃锛屾墍浠ヨ繖涓椂鍊欐垜浠渶瑕佷娇鐢ㄧ3鐨勮鍙?

2.3 鍒犻櫎鏁版嵁搴?/h2>

1. 鍒犻櫎鏁版嵁搴?/h3>

drop database student;
           

2. 濡傛灉瀛樺湪鍒欏垹闄ゆ暟鎹簱

drop database if exists student;
           

2.4 鏌ョ湅鍒涘缓鐨勬暟鎹簱鐨凷QL

鏌ョ湅鏁版嵁搴撶殑鍒涘缓鍐呭

show create database student;
           

2.5 鍒涘缓鏁版嵁搴撴寚瀹氬瓧绗︾紪鐮佷互鍙婃煡鐪嬪瓧绗︾紪鐮?/h2>

鍒涘缓鏁版嵁搴撴寚瀹氬瓧绗︾紪鐮佷互鍙婃煡鐪嬫暟鎹簱鐨勫瓧绗︾紪鐮?

create databse if not exists `students` charset=gbk;
           

2.6 淇敼鏁版嵁搴撳瓧绗︾紪鐮?/h2>

alter database student charset=gbk;
           

2.7 鏁版嵁搴撴搷浣滅殑缁撴潫璇?/h2>