Qt 4.0: Q3SqlSelectCursor Class Reference

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# Q3SqlSelectCursor Class Reference
[Qt3Support module]

The Q3SqlSelectCursor class provides browsing of general SQL SELECT statements. More...

    #include <Q3SqlSelectCursor>

This class is part of the Qt 3 support library. It is provided to keep old source code working. We strongly advise against using it in new code. See Porting to Qt 4 for more information.

Note to Qt Desktop Light Edition users: This class is only available in the Qt Desktop Edition.

Inherits Q3SqlCursor.

- List of all members, including inherited members

### Public Functions

- Q3SqlSelectCursor ( const QString & query = QString(), QSqlDatabase db = QSqlDatabase() )
- Q3SqlSelectCursor ( const Q3SqlSelectCursor & other )
- ~Q3SqlSelectCursor ()

- 43 public functions inherited from Q3SqlCursor
- 28 public functions inherited from QSqlRecord
- 33 public functions inherited from QSqlQuery

### Additional Inherited Members

- 7 protected functions inherited from Q3SqlCursor

## Detailed Description

The Q3SqlSelectCursor class provides browsing of general SQL SELECT statements.

Q3SqlSelectCursor is a convenience class that makes it possible to display result sets from general SQL `SELECT` statements in data-aware Qt widgets. Q3SqlSelectCursor is read-only and does not support `INSERT`, `UPDATE` or `DELETE` operations.

Pass the query in at construction time, or use the Q3SqlSelectCursor::exec() function.

Example:

        ...
        Q3SqlSelectCursor* cur = new Q3SqlSelectCursor("SELECT id, firstname, lastname FROM author");
        Q3DataTable* table = new Q3DataTable(this);
        table->setSqlCursor(cur, true, true);
        table->refresh();
        ...
        cur->exec("SELECT * FROM books");
        table->refresh();
        ...

## Member Function Documentation

### Q3SqlSelectCursor::Q3SqlSelectCursor ( const QString & query = QString(), QSqlDatabase db = QSqlDatabase() )

Constructs a read only cursor on database db using the query query.

### Q3SqlSelectCursor::Q3SqlSelectCursor ( const Q3SqlSelectCursor & other )

Constructs a copy of other

### Q3SqlSelectCursor::~Q3SqlSelectCursor ()

Destroys the object and frees any allocated resources