ON å¥ ã¯ çµåããããã®æ¡ä»¶ã§ãXXX ã®å ´åã ã XXX ã¨ãã£ã¤ãã¦ãã¨ããæå³ã WHERE å¥ã¯ FROM å¥ã®çµåããã¹ã¦çµãã£ãå¾ã®ãæ½åºããæ¡ä»¶ã SQL SELECT e.emp_no, e.emp_name, d.dept_no, d.dept_name FROM emp e LEFT OUTER JOIN dept d ON e.dept_id = d.id AND d.dept_no = '20' ORDER BY e.emp_no çµæ EMP_NO EMP_NAME DEPT_NO DEPT_NAME 7369 SMITH 20 RESEARCH 7499 ALLEN null null 7521 WARD null null 7566 JONES 20 RESEARCH 7654 MARTIN null null 7698 BLAKE null null 7
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