@@ -92,10 +92,12 @@ create timeseries root.turbine.d1.s1(temprature) with datatype=FLOAT, encoding=R
The `temprature` in the brackets is an alias for the sensor `s1`. So we can use `temprature` to replace `s1` anywhere.
> Notice that the size of the extra tag and attribute information shouldn't exceed the `tag_attribute_total_size`.
> IoTDB also supports [using AS function](../Operation%20Manual/DML%20Data%20Manipulation%20Language.md) to set alias. The difference between the two is: the alias set by the AS function is used to replace the whole time series name, temporary and not bound with the time series; while the alias mentioned above is only used as the alias of the sensor, which is bound with it and can be used equivalent to the original sensor name.
The only difference between tag and attribute is that we will maintain an inverted index on the tag, so we can use tag property in the show timeseries where clause which you can see in the following `Show Timeseries` section.
> Notice that the size of the extra tag and attribute information shouldn't exceed the `tag_attribute_total_size`.
## UPDATE TAG OPERATION
We can update the tag information after creating it as following: