Hello
A table is like this :
| server_name | connected_number | datetime |
server_name
i s the primary key
A process regularly updates this table, several hundreds of servers once, by a insert .. on duplicate update ..
All the rows updated have the same datetime value, its represents the update time. This is used to remove previous rows with prior datetime values when they exist. How can i display this unique value just one time (as a legend?) in the panel representing the 2 colums server_name and connected_number ? this is a way to know that data are up to date.