Most major Database Management Systems (DBMSs) use the Structured Query Language (SQL) as their query language. So executing a database command usually means sending an SQL statement to the DBMS for execution. You can call the execute method of a connection object to execute a database command. Before calling the execute method the connection object must represent an open connection to a database. See connecting to ODBC databases and connecting to MySQL databases for more information about connecting to databases.
See the Irie Pascal Programmer's Reference Manual (in "progref.html") for more information.