Instead of viewing query results in Result Set grids, you can export the result of one or more queries to a file. For very large results, this may be the preferred choice due to memory constraints.

To export a query result, create a script with

1. an @export on command,
2. an @export set command,
3. one or more queries,
4. an @export off command.

Here is a basic example:

@export on;
@export set filename="c:\Backups\Orders.csv";
select * from Orders;
@export off;

The @export set command takes a parameter name followed by an equal sign and a value. You can use the following parameters, where only filename is required and all names are case-insensitive:

Here are a few examples using some of these settings.

Automatic table name to file mapping

This example shows how to make the filename the same as the table name in the select statement. The example also shows several select statements. Each will be exported in the SQL format. Since the filename is defined to be automatically set, this means that there will be one file per result set and each file is named by the name of its table.

@export on;
@export set filename="c:\Backups\${dbvis-object}$" format="sql";
select * from Orders;
select * from Products;
select * from Transactions;
@export off;

Multiple results to a single file

This example shows how all result sets can be exported to a single file. The AppendFile parameter supports the following values.

• true
     The following result sets will all be exported to a single file
• false
     Turn off the append processing
• clear
     Same as the true value but this will in addition clear the file before the first result set is exported

@export on;
@export set filename="c:\Backups\alltables.sql" appendfile="clear" format="sql";
select * from Orders;
select * from Products;
select * from Transactions;
@export off;

Using predefined settings

If you save settings when exporting a table or a schema, you can use the Settings parameter to reference the settings file.

@export on;
@export set settings="c:\tmp\htmlsettings.xml" filename="c:\Backups\${dbvis-object}$";
select * from Orders;
select * from Products;
select * from Transactions;
@export off;

Limit the number of exported rows

You can use the @set maxrows command in combination with the @export command to override the Max Rows field value in the SQL Commander tab toolbar.

@set maxrows 10;
@export on;
@export set filename="c:\Backups\alltables.sql" format="sql";
select * from Orders;
select * from Products;
select * from Transactions;
@export off;

If Max Rows is set to a positive number, you can use the @set maxrows command to set it to -1 to export all rows.