MySQL
FROMã§ã«ã³ãã§ä¸¦ã¹ãã ã SELECT * FROM A, B; ä¾ãã°ã²ã¼ã ã¿ãããªãã¤ã§ãusersãã¼ãã«ã¨ãlevelsãã¼ãã«ããã£ã¦ãusersã¨levelsã«ã¯ä½ã®é¢ä¿ããªããã©ãuserä¸äººä¸äººã«å ¨ã¬ãã«ãçµåãããã¿ãããªã¨ãã SELECT users.name, levels.level FROM usâ¦