record set

To be able to read database data, the data must first be loaded into a recordset.

Take precautions against trying to fill a control from a recordset with a large number of records.

A recordset constructs a SQL statement by building up the pieces of a SQL statement into a CString.

The exception is a database join , in which one recordset represents columns from two or more tables .

A cursor is a mechanism used for keeping track of its position in a recordset.

An example of a recordset based on a table is "all customers, " which accesses a Customer table.

For a filtered recordset without parameters, the SELECT statement must be processed each time you Requery with a new filter value.

Faster Database Access: The REALbasic database API is now significantly faster when iterating through a recordset using the Field function.

After an ADO Database Connection has been created, as demonstrated in the previous chapter, it is possible to create an ADO Recordset.

This section describes the sequence of RFX events as a recordset object is opened and as you add, update, and delete records.

Note : When you close the original Recordset none of the copies will be closed . You will have to close the clones one by one .

One of the major differences is that you are not necessarily retrieving the equivalent of a recordset, but an entire schema structure.

Object. In a true join, records are taken from parent and child tables and put into a single, flat recordset.

It also exhibits cursor behavior depending on the recordset properties set by an application.

Sometimes you might want to put a list box or combo box control in your record view and fill it with values from a second recordset object.

Construct a new recordset object (or prepare to call Requery for an existing object).

Note: This property must be set on the parent Recordset before the child Recordset is retrieved .

The field data members of the recordset, which are to be bound to specific columns of the table.

Construct a new recordset object (or prepare to call Requery for an existing one).

The Update method is used to save all changes made to a single record in a Recordset.

You can execute your query and work with a recordset in a grid that lets you scroll through and edit records in the database.

If you add a new record, the recordset operates as an edit buffer to build up the contents of the new record.

Beyond that, you might want to use other record sets as well, as discussed in Record Views: Filling a List Box from a Second Recordset.

The name of the corresponding field data member or parameter data member in the recordset class.

If you want to base the recordset on a complex SQL statement, you need to use some combination of these customization techniques.

Or, you can specify a forward-only recordset, which allows only forward scrolling, one record at a time.

This recordset is then used to iterate through the search results to display a given subset.

Before you create your recordset class, determine what parameters you need, what their data types are, and how the recordset uses them.

As a precondition for calling Update, the recordset must not be empty and the current record must not have been deleted.

The mysql_fetch_field() function returns an object containing information of a field from a recordset.

The basic approach is to use the record view to display and perhaps update the records of a single recordset.

Define a Connection object and a Recordset object, and then execute the Open method on the Connection object.

Component for Sorting Processing Records - This project translates recordset information into useful hierarchy and node objects.

Bookmarks associated with one recordset object are valid on a second recordset.

If the string is a SQL SELECT statement or an ODBC CALL statement, the framework uses the string as the recordset's SQL statement.

The recordset contains all of the student records, sorted in descending order (Z to A) by last name, then by first name.

This establishes the recordset object as an edit buffer containing the columns of the first record.

Note: An error will occur if the Recordset object does not support bookmarks or backward cursor movement.

Call this member function to determine how a Rollback operation affects cursors on open recordset objects.

Document can store recordset and coordinate multiple views; does not support serialization or the New, Open, Save, and Save As commands.

The mysql_field_seek() function jumps to a specified field in a recordset.

Provide dialog data exchange (DDX) between the form controls and the associated recordset object.

The ADO Recordset object is used to hold a set of records from a database table.

As with adding records, editing records involves changing the values of the recordset's field data members.

The recordset objects are typically destroyed when they exit the scope of a function.

This includes explicit updates, as well as the UpdateBatch method on a Recordset.

Cannot retrieve parameter information for the selected recordset.

Specifies database document support and multiple recordset views, but no serialization.

For information about recordset data members, see Recordset: Architecture (ODBC).

As a result, you use a considerably simpler class interface to manipulate records through a recordset object.

For more information about overriding the default SQL, see SQL: Customizing Your Recordset's SQL Statement (ODBC).

However, if you execute a Requery on the original Recordset, the clones will no longer be synchronized to the original.

A primary key must be defined on the updatable recordset returned by the SELECT statement.

This method is much more efficient than creating, opening, and closing a new Recordset equal to the original.

Identifies the operations through which bookmarks persist on recordset objects.

Within the context of OLE DB for SQL Server Compact Edition, this means that the recordset will not be valid, and must be closed.

When the framework appends it to the recordset's SQL statement, the WHERE clause constrains the selection.

In a multiuser environment, other users can open record sets that contain some of the same records you have selected in your recordset.

Declare a recordset object as a local variable in a function.

The recordset object's field data members, taken together, constitute an edit buffer that holds the selected columns of one record.

Form-based applications usually store a pointer to a recordset object in the view.

Support for adding the complete recordset, recordset rows, and individual field values is provided.

Recordset filters are useful for joining tables and for using parameters based on information obtained or calculated at run time.

Tip: Use this method to refresh the entire contents of a Recordset.

Specify a string to replace the default SQL SELECT statement that the recordset constructs.

The join operation, a common data-access task, lets you work with data from more than one table using a single recordset object.

You must specify parameter values before you call Open (for a new recordset object) or Requery (for an existing one).

Use the recordset within the function and let it be destroyed automatically when the function exits.

The values of this record's fields are stored in the recordset object's field data members.

For a parameterized recordset, the database must process a SQL SELECT statement only once.

This option gives you a form-based application in which the record view is used to view and update records through its recordset.

Note: The Bookmark property is available only in Recordset objects that support bookmarks.

For more information, see Recordset: Dynamically Binding Data Columns (ODBC).

After this property is set, you can retrieve the number of pages (PageCount) that are available in the recordset.

In ADO the recordset can provide disconnected access, but ADO is designed primarily for connected access.

if you do not select this box, no columns are bound, and you must bind them manually in the recordset class.

Identifies the effect of committing a transaction on an open recordset object.

When the framework appends the ORDER BY clause to the recordset's SQL query, the clause controls the selection's ordering.

This topic explains how to filter a recordset so that it selects only a particular subset of the available records.

The record view and its recordset are destroyed when you close the document.

Identifies the effect of rolling back a transaction on an open recordset object.

Rather than accepting this default, you can substitute another recordset type.

A recordset object gives you access to all the selected records.

The framework loads the record into the field data members of the recordset.

The data can also be loaded into an in-memory recordset and accessed by other package elements.

Specifies support for storing database or recordset objects in documents and views.

By default, this is the name of the table you specified for the recordset in the wizard, but you can change what the function returns.

For an example, see Record Views: Filling a List Box from a Second Recordset.

The recordset selects only those records that meet the search condition you specified.

Test whether the recordset allows requerying and refresh the recordset's contents.

For more information, see SQL: Customizing Your Recordset's SQL Statement (ODBC).

Specify whether the recordset is a dynaset or snapshot.

Your role in recordset updating and what the framework does for you.

The parameter value is different each time you requery the recordset for a new student ID.

In a recordset, you can combine fields only from tables, views, and non-parameterized queries.

This is more efficient than opening a recordset and performing the updates or deletions one record at a time.

Specify parameter data members if you want a parameterized recordset.

The recordset as an edit buffer and the differences between dynasets and snapshots.

Construct the recordset objects either when you initialize the document or as needed.

The most important members of your recordset class are the field data members.

For more information about the edit buffer and how updates store the current record, see Recordset: How Recordsets Update Records (ODBC).

The SQL sent depends on how you design and open your recordset class.

The Collection is assigned to either a Command object, Connection object, Field object, or a Recordset object.

Specify whether the recordset is read-only or append-only.

Specifies whether the recordset is a dynaset (default) or a snapshot.

In some cases, the framework can use only the columns selected in your recordset to identify which record in your table to update.

View all methods and properties of the Recordset object.

ADO applications use the Delete method of the Recordset object.

Call the Open member function (or Requery, for an existing recordset).

Close, delete, and recreate the recordset as needed, or call its Requery member function to refresh the records.

The record's columns are loaded into the recordset's field data members.

For more information about record sets, see Recordset (ODBC).

A value indicating the effect of transactions on open recordset objects. For details, see Remarks.

Copying begins at the current row of the recordset.

How a recordset constructs its SQL statement and selects records.

Recordset parameters let you accomplish that goal.

Specify field data members for the recordset's columns.

A parameterized class lets you base a recordset query on information obtained or calculated at run time.

In this case, the recordset contains records for all senior students.

Note: Set this property before opening the Recordset.

For an example of when you might make special use of the parameters, see Recordset: Obtaining SUMs and Other Aggregate Results (ODBC).

The following topics explain the details of using recordset objects.

If you are using bulk row fetching, see Recordset: Fetching Records in Bulk (ODBC).

Then, when you call your recordset's Requery member function, the query selects only that student's record.

A recordset looks like a single table.

Alter the string that the wizard writes in your recordset's GetDefaultSQL member function.

A good place to start your reading is with Recordset (ODBC).

A Dynamic Recordset - This example program demonstrates how to use a dynamic recordset.

You can parameterize the recordset to qualify the recordset selection at run time.

Note: This method can be used on all Recordset objects.

The sort order for the recordset, if any, contained in the m_strSort data member.

Your call to the recordset's AddNew or Edit member function causes RFX to store the current edit buffer so it can be restored later.

To add new records to a recordset.

The recordset contains records for all class sections for MATH101.

Pass a custom SQL string in lpszSQL when you call Open for the recordset.

To delete records from a recordset.

Records added by other users after you open the recordset do not show up in your recordset unless you requery.

Object, no new recordset is created.

How to first create a database connection, then a recordset, and then display the data in HTML.

When you finish using the recordset object, you close and destroy it.

For example, suppose you want to specify a filter string for your recordset using information obtained at run time.

How to add, update, delete data from a database using ADO recordset?

By default, a record view is associated with a single recordset object, whose fields are mapped to the record view's controls.

If a table changes, you must manually update the recordset for the table, then recompile your application.

How to declare parameter data members in your recordset class.

How to get data from a database using ADO recordset?

This topic explains how to sort your recordset.

Some objects use external resources during their lifetime; a database connection, for example, might update a recordset.

When you update (edit) a record, the edit buffer is used to set the field data members of the recordset to new values.

When and why you might want to parameterize a recordset.

How to lock records in your recordset during updates.

Deleting a record from a recordset involves scrolling to the record and calling the recordset's Delete member function.

With My SQL, we can query a database for specific information and have a recordset returned.

Opens a database element that gives you access to records in a table, the results of a query, or to a saved Recordset

Included are some functions that build dropdowns and forms based on values in a recordset.

When the recordset updates a record, RFX calls ODBC API functions to send a SQL UPDATE or INSERT statement to the driver.

To apply a sort order to the recordset.

For example, a variable may contain a recordset with many rows of private data such as telephone numbers.

A recordset can join two or more tables from the same data source, but not tables from different data sources.

RFX and DFX move data between the current record of the data source and the field data members of a recordset object.

Besides exchanging data between the data source and the recordset's field data members, RFX manages binding parameters.

The framework's record field exchange (RFX) mechanism exchanges data between the recordset and the data source .

In either case, the new recordset represents the current state of the data source.

To turn on this optimization, set the dwOptions parameter in the Open call for your recordset to the following

Clears the current Recordset object and returns the next Recordset object by looping through a series of commands

Sets or returns the name of the current index for a Recordset object

When you define a recordset class, you specify the data source to associate it with, the table to use, and the columns of the table.

Copies multiple records from a Recordset object into a two-dimensional array

The RFX global functions exchange data between columns on the data source and field data members in your recordset.

RFX additionally transfers data from your recordset to the data source.

Sets or returns the maximum number of records allowed on a single page of a Recordset object

In some cases, you might want to request or refresh the recordset to include changes that have occurred on the data source.

Saves all changes made to a single record in a Recordset object

The recordset executes the SQL statement and the data source selects the first record.

If the data source is read-only, the recordset will be read-only.

If the data source is not read-only, you can specify that your recordset be updatable, appendable, or read-only.

To create an HTML table with data from a recordset, we only need to use three of the parameters above (all parameters are optional)

Returns a value that describes if the Recordset object is open, closed, connecting, executing or retrieving data

Exchange data between a database and a recordset object

Transaction: Performing a Transaction in a Recordset (ODBC)

Sets or returns a value that specifies the ordinal position of the current record in the Recordset object

Recordset: Declaring a Class for a Predefined Query (ODBC)

Retrieves the rest of the records in the Recordset object

When you call a recordset object's Open member function, Open constructs a SQL statement using some or all of the following ingredients

An operation moved the record pointer within the Recordset

Declare a recordset class for a predefined query

Sets or returns the cursor type of a Recordset object

Recordset: Declaring a Class for a Table (ODBC)

Indicates the number of Field objects in the Recordset object

To pass parameter values to a recordset object at run time

Sets or returns a filter for the data in a Recordset object

Contains all the Property objects in the Recordset object

Bind data columns in a recordset dynamically at run time

Pass parameter values to a recordset at run time

' Open Recordset (and execute SQL statement above)

To specify a filter for a recordset object

The following RFX activities occur, in the order shown, when you call a recordset object's Open member function

Moves the record pointer in a Recordset object

Number of fields in a recordset

Declare a recordset class for a table

Sets or returns a value that specifies the page number in the Recordset object

Using ASP to Realize Pagination Display of Recordset

Perform a join with a recordset

Declare your recordset class with the Add Class wizard

Obtain SUMs and other aggregate results in a recordset

Triggered before the current position in the Recordset changes

Work with large data items in a recordset

It can also move updated data back to the recordset and then to the data source.

Triggered before a Recordset change

Besides supplying a filter, a sort order, or parameters, you can take the following actions to customize your recordset's selection

How a Recordset Constructs Its SQL Statement

Create a Recordset on the Confirmation Page

Choosing a Random Record from a Recordset

Lock records in a recordset

Extract Data from the Recordset

Run the recordset's query by calling Open

To specify a sort order for a recordset object

Research on Data Manipulation based on Recordset

Dim db as database dim tb as recordset

How and When You Can Affect a Recordset

Determining if a Recordset is Empty

Sets or returns a value that specifies the type of locking when editing a record in a Recordset

Call Requery to requery the recordset with the latest values on the data source

RFX and Bulk RFX simplify the transfer of data from the data source into your recordset;