INSTR , SUBSTR SELECT SUBSTR( 'EX_CONTENTS', 4) SUBSTR1 ,INSTR ('EX_CONTENTS', '_') INSTR1 ,SUBSTR( 'EX_CONTENTS', INSTR ('EX_CONTENTS', '_') ) SUBSTR2 ,SUBSTR( 'EX_CONTENTS', INSTR ('EX_CONTENTS', '_') + 1 ) SUBSTR3 FROM DUAL - write by 꼬마갱이 2009.12.11 - ORACLE·sql 2009.12.11