SQL Commands and Functions

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Visual FoxPro supports Structured Query Language (SQL) commands and functions. Visual FoxPro's SQL commands make use of Rushmore Query Optimization technology to optimize performance, and a single SQL command can be used to replace multiple Visual FoxPro commands.

Visual FoxPro supports the following:

ALTER TABLE - SQL Command


Modifies an existing table. You can modify the name, type, precision, scale, null value support, and referential integrity rules for each field in the table.
ASQLHANDLES( ) Function


Stores numeric references to all active SQL connection statement handles in an array.
CREATE CURSOR - SQL Command


Creates a temporary table. Each field in the temporary table is defined with a name, type, precision, scale, null value support, and referential integrity rules. These definitions can be obtained from the command itself or from an array.
CREATE SQL VIEW Command


Displays the View Designer, allowing you to create an SQL view.
CREATE TABLE - SQL Command


Creates a table. Each new table field is defined with a name, type, precision, scale, null value support, and referential integrity rules. These definitions can be obtained from the command itself or from an array.
DELETE - SQL Command


Marks records in a table for deletion using SQL syntax.
INSERT - SQL Command


Appends a new record to the end of an existing table. The new record contains data listed in the INSERT command or from an array.
SELECT - SQL Command


Specifies the criteria on which a query is based and issues the query. Visual FoxPro interprets the query and retrieves the specified data from the table(s). The SELECT command is built into Visual FoxPro like any other Visual FoxPro command. You can create a SELECT command query in these areas:
  • In the Command window.

  • In a Visual FoxPro program (like any other Visual FoxPro command).

  • In the Query Designer.

SQL Pass Through Foundation Class


Makes it possible for you to execute stored procedures on a host database such as Microsoft SQL Server.
SQLCANCEL( ) Function


Requests cancellation of an executing SQL statement
SQLCOLUMNS( ) Function


Stores a list of column names and information about each column for the specified data source table to a Visual FoxPro cursor.
SQLCOMMIT( ) Function


Commits a transaction.
SQLCONNECT( ) Function


Establishes a connection to a data source.
SQLDISCONNECT( ) Function


Terminates a connection to a data source.
SQLEXEC( ) Function


Sends an SQL statement to the data source, where the statement is processed.
SQLGETPROP( ) Function


Returns current or default settings for an active connection.
SQLIDLEDISCONNECT( ) Function


Allows a SQL pass-through connection to be temporarily disconnected.
SQLMORERESULTS( ) Function


Copies another result set to a Visual FoxPro cursor if more result sets are available.
SQLPREPARE( ) Function


Prepares an SQL statement for remote execution by SQLEXEC(В ).
SQLROLLBACK( ) Function


Cancels any changes made during the current transaction.
SQLSETPROP( ) Function


Specifies settings for an active connection.
SQLSTRINGCONNECT( ) Function


Establishes a connection to a data source through a connection string.
SQLTABLES( ) Function


Stores the names of tables in a data source to a Visual FoxPro cursor.
UPDATE - SQL Command


Updates records in a table. The records can be updated based on the results of a SELECT - SQL statement.

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