Query Execution in JPA get. Result. List, get. Single. Result. The Queryjavax. Query. JPA interface. Interface used to control query execution. See Java. Doc Reference Page. SELECT queries. Similarly, the Typed. Queryjavax. persistence. Typed. Query. JPA interface. Interface used to control the execution of typed queries. See Java. Doc Reference Page. In addition, the Query interface defines a method for running DELETE and UPDATE queries. PRAGMA functions. PRAGMAs that return results and that have no sideeffects can be accessed from ordinary SELECT statements as tablevalued functions. Release history. The tables below are in chronological order by release number, so the oldest stillsupported versions and most recently available versions are found. This page covers the following topics. Ordinary Query Execution with get. Result. List. The following query retrieves all the Country objects in the database. Because multiple result objects are expected, the query should be run using the get. Result. Listget. Result. ListTyped. Querys method. Execute a SELECT query and return the query results as a typed List. See Java. Doc Reference Page. Both Queryjavax. persistence. Query. JPA interface. Collabnet Subversion Installation On Linux. Interface used to control query execution. See Java. Doc Reference Page. Typed. Queryjavax. Typed. Query. JPA interface. Interface used to control the execution of typed queries. See Java. Doc Reference Page. Result. List method, but the version of Queryjavax. Query. JPA interface. Interface used to control query execution. See Java. Doc Reference Page. An attempt to cast the above results to a parameterized type Listlt Country will cause a compilation warning. If, however, the new Typed. Queryjavax. persistence. Typed. Query. JPA interface. Interface used to control the execution of typed queries. See Java. Doc Reference Page. Update Query In Sqlite Using Context' title='Update Query In Sqlite Using Context' />This year, Im building a UWP time tracking app. Last week, I covered some details about ModelViewViewModel, a pattern that helps simplify user interface code and. The query result collection functions as any other ordinary Java collection. A result collection of a parameterized type can be iterated easily using an enhanced for loop. SQLITE-LISTVIEW-2.png' alt='Update Query In Sqlite Using Context' title='Update Query In Sqlite Using Context' />Country c results. System. out. printlnc. Name. Note that for merely printing the country names, a query that uses projection and retrieves country names directly instead of fully built Country instances would be more efficient. Single Result Query Execution with get. Single. Result. The get. Result. Listget. Result. ListTyped. Querys method. Execute a SELECT query and return the query results as a typed List. See Java. Doc Reference Page. In this case, the result object has to be extracted from the result collection after query execution e. To eliminate this routine operation JPA provides an additional method, get. Single. Resultget. Single. ResultTyped. Querys method. Execute a SELECT query that returns a single result. See Java. Doc Reference Page., as a more convenient method when exactly one result object is expected. The following aggregate query always returns a single result object, which is a Long object reflecting the number of Country objects in the database. Notice that when a query returns a single object it might be tempting to prefer Queryjavax. Query. JPA interface. Interface used to control query execution. See Java. Doc Reference Page. Typed. Queryjavax. Typed. Query. JPA interface. Interface used to control the execution of typed queries. See Java. Doc Reference Page. An aggregate COUNT query always returns one result, by definition. In other cases our expectation for a single object result might fail, depending on the database content. For example, the following query is expected to return a single Country object. However, the correctness of this assumption depends on the content of the database. If the database contains multiple Country objects with the name Canada e. Non. Unique. Result. Exceptionjavax. persistence. Non. Unique. Result. Exception. JPA exception. Thrown by the persistence provider when Query. Single. Result or Typed. Query. get. Single. Result is executed on a query and there is more than one result from the query. See Java. Doc Reference Page. On the other hand, if there are no results at all a No. Result. Exceptionjavax. No. Result. Exception. JPA exception. Thrown by the persistence provider when Query. Single. Result or Typed. Query. get. Single. Resultis executed on a query and there is no result to return. See Java. Doc Reference Page. Therefore, using get. Single. Resultget. Single. ResultTyped. Querys method. Execute a SELECT query that returns a single result. See Java. Doc Reference Page. DELETE and UPDATE Query Execution with execute. Update. DELETE and UPDATE queries are executed using the execute. Updateexecute. UpdateQuerys method. Execute an update or delete statement. See Java. Doc Reference Page. For example, the following query deletes all the Country instances. Country instances to zero. A Transaction. Required. Exceptionjavax. persistence. Transaction. Required. Exception. JPA exception. Thrown by the persistence provider when a transaction is required but is not active. See Java. Doc Reference Page. On success the execute. Update method returns the number of objects that have been updated or deleted by the query. The Query Structure section explains DELETE and UPDATE queries in more detail.