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docs: Select - fixed typo 

Fixed typo in Select documentation around _WDURATION.
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Sean Ely 2022-08-22 14:18:01 -07:00 committed by GitHub
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docs/en/12-taos-sql/06-select.md
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@ -171,8 +171,8 @@ The \_QSTART and \_QEND pseudocolumns contain the beginning and end of the time
The \_QSTART and \_QEND pseudocolumns cannot be used in a WHERE clause. The \_QSTART and \_QEND pseudocolumns cannot be used in a WHERE clause.
**\_WSTART, \_WEND, and \_DURATION** **\_WSTART, \_WEND, and \_WDURATION**
\_WSTART, \_WEND, and \_WDURATION pseudocolumns
The \_WSTART, \_WEND, and \_WDURATION pseudocolumns indicate the beginning, end, and duration of a window. The \_WSTART, \_WEND, and \_WDURATION pseudocolumns indicate the beginning, end, and duration of a window.
These pseudocolumns can be used only in time window-based aggregations and must occur after the aggregation clause. These pseudocolumns can be used only in time window-based aggregations and must occur after the aggregation clause.