SELECT t1.last_name FROM staff AS t1 JOIN complaints AS t2 ON t1.staff_id  =  t2.staff_id ORDER BY t2.date_complaint_raised LIMIT 1
SELECT t1.last_name FROM staff AS t1 JOIN complaints AS t2 ON t1.staff_id  =  t2.staff_id ORDER BY t2.date_complaint_raised LIMIT 1 <table_name> : Staff col : staff_id | gender | first_name | last_name | email_address | phone_number row 1 : 114 | 0 | Ward | Boehm | marcelle.ritchie@example.com | (379)551-0838x146 row 2 : 115 | 1 | Lucie | Lowe | ohintz@example.org | 142-311-6503x206 row 3 : 116 | 0 | Dagmar | Erdman | wrau@example.com | 345-656-5571 row 4 : 117 | 0 | Bradly | Hahn | brett99@example.net | 1-132-839-9409x288 row 5 : 118 | 0 | Austin | Zieme | reichel.armani@example.org | (383)553-1035x20399 row 6 : 119 | 0 | Dorian | Oberbrunner | richard.gutkowski@example.com | 155-811-6153 row 7 : 120 | 0 | Mikel | Lynch | glen.borer@example.com | 751-262-8424x575 <table_name> : Complaints col : complaint_id | product_id | customer_id | complaint_outcome_code | complaint_status_code | complaint_type_code | date_complaint_raised | date_complaint_closed | staff_id row 1 : 1 | 117 | 120 | OK | Closed | Product Failure | 2002-07-18 10:59:35 | 1976-04-19 11:03:06 | 114 row 2 : 2 | 118 | 113 | OK | New | Product Unusable | 1973-02-10 22:55:56 | 2013-09-14 02:59:10 | 120 row 3 : 3 | 119 | 114 | OK | New | Product Unusable | 2006-10-29 07:08:46 | 1995-09-11 14:48:46 | 115 row 4 : 4 | 120 | 114 | OK | Closed | Product Unusable | 1977-08-06 00:31:19 | 1970-10-14 00:57:25 | 114 row 5 : 5 | 117 | 118 | OK | Open | Product Failure | 2007-10-14 21:50:43 | 2000-08-17 17:02:48 | 116 row 6 : 6 | 118 | 114 | OK | Open | Product Unusable | 1987-07-11 14:40:30 | 1975-10-11 05:54:30 | 114 row 7 : 7 | 117 | 117 | OK | New | Product Unusable | 2002-07-18 10:59:35 | 1976-04-19 11:03:06 | 118 row 8 : 8 | 117 | 114 | OK | New | Product Unusable | 1973-02-10 22:55:56 | 2013-09-14 02:59:10 | 117 row 9 : 9 | 117 | 116 | OK | New | Product Unusable | 2006-10-29 07:08:46 | 1995-09-11 14:48:46 | 120 row 10 : 10 | 118 | 115 | OK | New | Product Unusable | 1977-08-06 00:31:19 | 1970-10-14 00:57:25 | 114 row 11 : 11 | 118 | 116 | OK | Open | Product Unusable | 2007-10-14 21:50:43 | 2000-08-17 17:02:48 | 115 row 12 : 12 | 117 | 116 | OK | Open | Product Unusable | 1987-07-11 14:40:30 | 1975-10-11 05:54:30 | 114
col : last_name row 1 : Lynch