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document metric column prefix for mysql and mssql

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Sven Klemm
2018-07-27 17:14:27 +02:00
parent 7905c29875
commit bc9b6ddefe
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docs/sources/features/datasources/mysql.md
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@@ -103,7 +103,7 @@ The resulting table panel:
If you set `Format as` to `Time series`, for use in Graph panel for example, then the query must return a column named `time` that returns either a sql datetime or any numeric datatype representing unix epoch.
Any column except `time` and `metric` is treated as a value column.
You may return a column named `metric` that is used as metric name for the value column.
You may return a column named `metric` that is used as metric name for the value column. If you return multiple value columns and a column named `metric` then this column is used as prefix for the series name.
**Example with `metric` column:**