by Markus Winand.

Returns, Refunds and Cancellations Policy


You are permitted to withdraw from this contract within fourteen (14) business days of the receipt of ordered goods. A withdrawal statement should be mailed to office@winand.at within the period - there is no need to specify the reason(s). In case of withdrawal, we only refund the amount charged (in full or in part) against return of the delivered goods. The cost of returning the goods is the responsibility of the customer. Goods must be returned in its original packaging and in an unused and re-sellable condition. We reserve the right to charge a reasonable fee if goods are returned in poor condition.

About the Author

Photo of Markus Winand

Markus Winand teaches efficient SQL—inhouse and online. He minimizes the development time using modern SQL and optimizes the runtime with smart indexing. His book entitled SQL Performance Explained has become standard reading.

Buy his Book on Amazon

Cover of “SQL Performance Explained”: Squirrel running on grass

The essence of SQL tuning in 200 pages

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(paperback only)

Paperback and PDF also available at Markus’ store.

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“Use The Index, Luke!” by Markus Winand is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 Unported License.
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