Refresh Fileld in DBGrid?

[salvarica]

Regards,

how to refresh dbgrid fild which is dynamically created from SQL queries, for example.
SQLQuery.Sql.Add ("select name, (select city from tab_city where ID = T1.id_city) as city from table1 T1");

After editing the query, the 'city' does not change is change in how its "id" in Sqlquery.

Thank you in advance!