QSqlQuerylast

QSqlQuery::last

QSqlQuery::last is a method provided by the QSqlQuery class in the Qt framework, which is used for database operations. The method returns the QSqlQuery object that was last executed by the query engine. The last query that was executed can be useful in certain situations, such as when keeping track of the last executed query in an application.

The QSqlQuery::last method is a read-only method, meaning that it does not allow the modification of the last query executed. If the query engine has not executed any queries, the method returns the QSqlQuery object in its default state.

QSqlQuery::last is typically used in conjunction with QSqlQuery::exec or QSqlQuery::executek to execute a SQL query. After executing the query, the QSqlQuery object returned by the last method can be used to retrieve the query results.

The code snippet below demonstrates the usage of QSqlQuery::last:

```c

QSqlQuery query;

query.prepare("SELECT * FROM table_name");

query.executek();

if (query.last().executedQuery().isValid()) {

// query executed successfully

}

```

This code prepares a SQL query, executes it using executek, and then checks if the last query executed was valid.

In summary, QSqlQuery::last provides a way to keep track of the last query executed by the query engine, allowing for convenient management of database operations in Qt applications.

Note that QSqlQuery also provides other methods for working with queries, such as setForwardOnly and primaryBindValue, which may be relevant in certain situations. However, QSqlQuery::last is primarily used to access the last executed query.