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rs.open sql,conn Óëconn.execute(sql)µÄÇø±ð
            rs.open sql,conn Óëconn.execute(sql)µÄÇø±ð
            rs.open
            sql,conn£ºÈç¹ûsqlÊÇdelete,update,insertÔò»á·µ»ØÒ»¸ö¹Ø±ÕµÄ¼Ç¼¼¯£¬ÔÚʹÓùý³ÌÖв»ÒªÀ´¸örs.closeÔÚÎļþ×îºóÔÙдrs.closeÖмä¿ÉÒÔÀ´¶à¸ö¼Ç¼¼¯rs1.open
            sql1,conn£¬×îºóÒ»¿é¹Ø±Õ¼Ç¼¼¯:rs.close rs1.close
            
            conn.execute(sql)£ºÈç¹ûsqlÊÇdelete,update,insertÔò»á·µ»ØÒ»¸ö¹Ø±ÕµÄ¼Ç¼¼¯£¬ÔÚʹÓùý³ÌÖв»ÒªÀ´¸örs.closeÔÚÎļþ×îºóÔÙдrs.closeÖмä¿ÉÒÔÀ´¶à¸ö¼Ç¼¼¯rs1.open
            sql1,conn£¬×îºóÒ»¿é¹Ø±Õ¼Ç¼¼¯:rs.close rs1.close.
            Èç¹ûsqlÊÇupdate,insert,deleteÔòÓ¦¸ÃʹÓÃconn.execute(sql)Ò²¿ÉÒÔ²»ÒªÀ¨ºÅconn.execute
            sql 
             Èç¹ûsqlÊÇselectÓï¾äÔòÓ¦¸ÃʹÓÃset
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            1.conn.execute
            sql="select * from admin where username='xiaozhu'"
            set rs=conn.execute(sql)
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