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Update index.mdx

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wade zhang 2022-06-16 10:46:20 +08:00 committed by gccgdb1234
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docs/en/07-develop/02-model/index.mdx
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@ -37,7 +37,7 @@ USE power;
## Create STable ## Create STable
In a time-series application, there may be multiple kinds of data collection points. For example, in the electrical power system there are meters, transformers, bus bars, switches, etc. For easy and efficient aggregation of multiple tables, one STable needs to be created for each kind of data collection point. For example, for the meters in [table 1](/tdinternal/arch#model_table1), the SQL statement below can be used to create the super table. In a time-series application, there may be multiple kinds of data collection points. For example, in the electrical power system there are meters, transformers, bus bars, switches, etc. For easy and efficient aggregation of multiple tables, one STable needs to be created for each kind of data collection point. For example, for the meters in [table 1](/concept/#model_table1), the SQL statement below can be used to create the super table.
```sql ```sql
CREATE STable meters (ts timestamp, current float, voltage int, phase float) TAGS (location binary(64), groupId int); CREATE STable meters (ts timestamp, current float, voltage int, phase float) TAGS (location binary(64), groupId int);