# Query internet information server (IIS) logs stored in Amazon S3
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You can use Amazon Athena to query Microsoft Internet Information Services (IIS) web server logs stored in your Amazon S3 account. While IIS uses a [variety](https://docs.microsoft.com/en-us/previous-versions/iis/6.0-sdk/ms525807(v%3Dvs.90)) of log file formats, this topic shows you how to create table schemas to query W3C extended and IIS log file format logs from Athena.

Because the W3C extended and IIS log file formats use single character delimiters (spaces and commas, respectively) and do not have values enclosed in quotation marks, you can use the [LazySimpleSerDe](lazy-simple-serde.md) to create Athena tables for them.

**Topics**
+ [Query W3C extended log file format](querying-iis-logs-w3c-extended-log-file-format.md)
+ [Query IIS log file format](querying-iis-logs-iis-log-file-format.md)
+ [Query NCSA log file format](querying-iis-logs-ncsa-log-file-format.md)