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    12 <concept xml:lang="en" id="GUID-F40E34F4-5B8B-523E-82B6-7717D8FD26AB"><title>Executing SQL statements</title><prolog><metadata><keywords/></metadata></prolog><conbody><p>The <codeph>RDbDatabase</codeph> class provides a member function, <codeph>Execute()</codeph>, which directly executes <i>both</i> DDL and DML statements on the database.</p> <p>As most of these statements can take an extended time to complete, there are also interfaces to execute these statements incrementally. </p> <ul><li id="GUID-D73DC76D-6E12-542D-9E60-81A7CDDF221F"><p><codeph>RDbIncremental</codeph> provides a member function, <codeph>Execute()</codeph>, which executes a DDL statement incrementally.</p> </li> <li id="GUID-AA5D4133-B777-5F3E-8DD1-3398D5012B11"><p><codeph>RDbUpdate</codeph> provides the functionality for executing a DML statement incrementally.</p> </li> </ul> <p>DML statements need a different interface because it is not always possible to know how many steps a DML operation is going to need.</p> </conbody></concept>