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						 | 
					
					
						
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						def replace_null_with_empty_string(conn): | 
					
					
						
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						    cursor = conn.cursor() | 
					
					
						
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						    query = """ | 
					
					
						
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						        UPDATE contacts | 
					
					
						
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						        SET  | 
					
					
						
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						            name = COALESCE(name, ''), | 
					
					
						
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						            phone = COALESCE(phone, ''), | 
					
					
						
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						            email = COALESCE(email, ''), | 
					
					
						
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						            vk_id = COALESCE(vk_id, ''), | 
					
					
						
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						            chat_id = COALESCE(chat_id, ''), | 
					
					
						
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						            ws_st = COALESCE(ws_st, ''), | 
					
					
						
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						            ws_stop = COALESCE(ws_stop, ''), | 
					
					
						
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						            web_st = COALESCE(web_st, ''), | 
					
					
						
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						            fin_prog = COALESCE(fin_prog, ''), | 
					
					
						
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						            b_city = COALESCE(b_city, ''), | 
					
					
						
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						            b_fin = COALESCE(b_fin, ''), | 
					
					
						
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						            b_ban = COALESCE(b_ban, ''), | 
					
					
						
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						            b_ign = COALESCE(b_ign, ''), | 
					
					
						
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						            b_baners = COALESCE(b_baners, ''), | 
					
					
						
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						            b_butt = COALESCE(b_butt, ''), | 
					
					
						
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						            b_mess = COALESCE(b_mess, ''), | 
					
					
						
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						            shop_st = COALESCE(shop_st, ''), | 
					
					
						
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						            curator = COALESCE(curator, ''), | 
					
					
						
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						            pr1 = COALESCE(pr1, ''), | 
					
					
						
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						            pr2 = COALESCE(pr2, ''), | 
					
					
						
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						            pr3 = COALESCE(pr3, ''), | 
					
					
						
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						            pr4 = COALESCE(pr4, ''), | 
					
					
						
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						            pr5 = COALESCE(pr5, ''), | 
					
					
						
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						            gc_url = COALESCE(gc_url, ''), | 
					
					
						
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						            key_pr = COALESCE(key_pr, ''), | 
					
					
						
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						            n_con = COALESCE(n_con, ''), | 
					
					
						
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						            canal = COALESCE(canal, ''), | 
					
					
						
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						            data_on = COALESCE(data_on, ''), | 
					
					
						
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						            data_t = COALESCE(data_t, ''), | 
					
					
						
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						            utm_source = COALESCE(utm_source, ''), | 
					
					
						
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						            utm_medium = COALESCE(utm_medium, ''), | 
					
					
						
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						            utm_campaign = COALESCE(utm_campaign, ''), | 
					
					
						
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						            utm_term = COALESCE(utm_term, ''), | 
					
					
						
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						            utm_content = COALESCE(utm_content, ''), | 
					
					
						
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						            gcpc = COALESCE(gcpc, '') | 
					
					
						
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						    """ | 
					
					
						
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						    cursor.execute(query) | 
					
					
						
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						    conn.commit() | 
					
					
						
						| 
							 | 
						
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