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Python Programming On Win32
book

Python Programming On Win32

by Andy Robinson, Mark Hammond
January 2000
Intermediate to advanced
672 pages
21h 46m
English
O'Reilly Media, Inc.
Content preview from Python Programming On Win32

Inserting Data into the Destination Database

Sooner or later you need to pump data into a destination database. We’ve already seen how DBAPI-compliant modules allow us to insert a list of tuples at one time, and how this provides optimal performance. In a case such as a data warehouse, the number of destination tables and fields will be quite small so it’s no trouble to build the SQL statements by hand for each table; and we already have the list of tuples ready to go:

mycursor.executemany(MyTableStatement, MyDataSet.data)

Where there are many destination tables, a shortcut can be taken if the field names are simple and match the underlying database well; you can write a routine that uses the field names in the DataSet and generates an SQL INSERT statement to match.

Often there are better ways to bulk-load data. The important thing is to know that you have correctly structured DataSets for the destination database; if that’s true, you can often save them to a tab- or comma-delimited file and use the database’s bulk-load facility with far greater speed.

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Publisher Resources

ISBN: 1565926218Errata Page