Tsql read from file

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Stack Gives Back Featured on Meta. New post summary designs on greatest hits now, everywhere else eventually. Linked Reads files that are created by the Extended Events asynchronous file target.

One event, in XML format, is returned per row. SQL Server There is no default. Starting with SQL Server , this parameter can be given as null. However, it is maintained for backward compatibility for log files generated in previous versions of SQL Server. In many cases, flat files are stored compressed in Zip documents. Zipped documents can store different files, contain a directory structure, and require a password for access.

Enzo allows you to read from compressed documents and folders directly; the name of the file must end with a ZIP extension. One of the key features of reading from a Zip document is the ability to search content in multiple files, using a search file pattern. For example, the following query will return data from three CSV files in a single call, from a Zip document stored in Dropbox, by specifying the filePattern argument. If a password is necessary to open the file, it should be stored in the CSV Configuration Setting directly.

The above examples show you how to read flat files when connecting directly to Enzo Server. However, you may need to read flat files using Linked Server when accessing files from a trigger, or a database view. Due to some of the limitations imposed by Linked Server, either a Default File Path value is provided so that column names can be extracted, or the list of Columns must be specified as part of the configuration setting.

Whenever possible, specifying Columns is preferred for performance reasons and to enforce data types. You can quickly add Columns to a configuration setting by letting Enzo parse the file; data types are automatically inferred whenever possible; they can also be modified at any time. The sampling option tells Enzo to try a number of records to test the data types identified in the first record; if another data type is found, the column will be set to varchar max automatically.

In this example, Enzo is running locally and has been registered as a Linked Server called localhost, For more information about how to setup Linked Server with Enzo, see this help documentation. Options include the ability to query remote files dynamically, compressed documents, download files locally for performance, and query through Linked Server connections to Enzo.

To try Enzo at no charge, download the latest edition of Enzo Server on our website. Toggle navigation. Exploring without a CSV Configuration In some cases you may want to explore a raw file without knowing ahead of time the kind of data you may find.

Local Cache When working with larger files, or when access speed matters most, it may be best to download the remote CSV file locally first using Enzo, and then query the file locally.