Data Movement Utilities Guide and Reference

Export Overview

The export utility exports data from a database to an operating system file, which can be in one of several external file formats.

The following information is required when exporting data:

• An SQL SELECT statement specifying the data to be exported.

• The path and name of the operating system file that will store the exported data.

• The format of the data in the input file. This format can be IXF, WSF, or DEL. See Appendix C. Export/Import/Load Utility File Formats.

• A message file name.

• When exporting typed tables, you may need to provide the subtable traverse order within the hierarchy. If the IXF format is to be used, the default order is recommended. When specifying the order, recall that the subtables must be traversed in the PRE-ORDER fashion. When exporting typed tables, you cannot provide a SELECT statement directly. Instead, you must specify the target subtable name, and optionally a WHERE clause. The export utility uses this information, along with the traverse order, to generate and execute the required SELECT statement. For more information, see Moving Data Between Typed Tables.

You can also specify:

• New column names when exporting to IXF or WSF files. If you do not want to specify new column names, the column names in the existing table or view are used in the exported file.

• Additional options to customize the export operation (see File Type Modifiers (Export)).

If you want to use the export utility in a multiple database partition environment, you can use db2batch to complete the task at each database partition. The SELECT statement must be able to return only the data found locally. The selection condition is as follows:

   SELECT * FROM tablename WHERE NODENUMBER(column-name) = CURRENT NODE

For more information about db2batch, see the Command Reference or the Administration Guide.

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