Usando rowspan

server/services/eventos.js

@@ -20,13 +20,16 @@ _out.println('<div style="display: flex; justify-content: center; margin-top: 80
             _out.println('</tr>')
             
             for (const dbRecord of dbRecords) {
-                    
+            
+                cont cat = dbRecords.filter(r => r.getString("categoria") == dbRecord.getString("categoria"))    
+        
                 _out.println('<tr style="height: 35px;">')
                     _out.println(`<td>${dbRecord.getString("titulo")}</td>`)
                     _out.println(`<td>${dbRecord.getString("data")}</td>`)
                     _out.println(`<td>${dbRecord.getInt("capacidade")}</td>`)
                     _out.println(`<td>${dbRecord.getDouble("preco")}</td>`)
-                    _out.println(`<td>${dbRecord.getString("categoria")}</td>`)
+                    cat.length > 1 && _out.println(`<td rowspan="${cat.length}">${dbRecord.getString("categoria")}</td>`)  
+                    cat.length === 1 && _out.println(`<td>${dbRecord.getString("categoria")}</td>`)
                 _out.println('</tr>')
             }