Query by example (CONSTRUCT) The CONSTRUCT instruction implements database query criteria input in an application form. Understanding the CONSTRUCT instruction The CONSTRUCT instruction provides database query, by entering search filters directly in form fields. Syntax of CONSTRUCT instruction The CONSTRUCT instruction provides database query by example, producing a WHERE condition for SELECT. CONSTRUCT programming steps Follow this procedure to use the CONSTRUCT dialog instruction. Using query by example Dialog coding concepts, configuration, and code structure. Examples CONSTRUCT dialog usage examples.