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Update 14-stream.md

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@ -147,10 +147,7 @@ In both of these methods, configuring the watermark is essential for obtaining a
## Supported functions ## Supported functions
All [scalar functions](../function/#scalar-functions) are available in stream processing. All [scalar functions](../function/#scalar-functions) are available in stream processing. All [System Information Functions](../function/#system-information-functions) are <b>not</b> allowed in stream processing. All [Aggregate functions](function/#aggregate-functions) and [Selection functions](../function/#selection-functions) are available in stream processing, except the followings:
All System Information Functions are <b>not</b> available for stream processing.
All [aggregate and selection functions](../function/#system-information-functions) are available in stream processing, except following functions
- [leastsquares](../function/#leastsquares) - [leastsquares](../function/#leastsquares)
- [percentile](../function/#percentile) - [percentile](../function/#percentile)
- [top](../function/#leastsquares) - [top](../function/#leastsquares)