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ADOCONNECTION1.connected:=false;
ADOCONNECTION1.connectionstring:=Provider=MSDASQL.1;Password=123456;Persist Security Info=True;User ID=root;Data Source=mysql_conn;Initial Catalog=mysql';
ADOCONNECTION1.LoginPrompt:=false;
ADOCONNECTION1.connected:=true;
ADOQuery1.close;
ADOQuery1.Connection:=ADOCONNECTION1;
ADOQuery1.sql.clear;
ADOQuery1.sql.add('select * from user');
ADOQuery1.open;