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docs: improved en version of sql/dql/limit #2226

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Jul 27, 2022
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docs: improved en version of sql/dql/limit #2226

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a24d3a3
docs: improved en version of sql/dql/limit
michelle-qinqin Jul 22, 2022
5ca862d
docs: improved the table
michelle-qinqin Jul 22, 2022
66f1913
docs: added introduction of standalone version
michelle-qinqin Jul 22, 2022
fb40ec5
docs: fixed synatx error
michelle-qinqin Jul 24, 2022
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11 changes: 6 additions & 5 deletions docs/en/reference/sql/dql/LIMIT_CLAUSE.md
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# Limit Clause

The Limit clause is used to limit the number of results. OpenMLDB currently only supports Limit accepting one parameter, indicating the maximum number of rows of returned data;
The Limit clause is used to limit the number of results. OpenMLDB currently only supports one parameter to limit the maximum number of rows of returned data.

## Syntax

Expand All @@ -16,17 +16,18 @@ SELECT ... LIMIT ...
```

## Boundary Description
For the standalone version, `LIMIT` is supported in all conditions. For the cluster version, the execution modes, which support this clause, are shown below.

| `SELECT` Statement Elements | Offline Mode | Online Preview Mode | Online Request Mode | Note |
|:-----------------------------------------------------------|--------------|---------------------|---------------------|:--------------------------------------------------------------------------------------------------------------------------------------------------------------|
| LIMIT Clause | **``✓``** | **``✓``** | **``✓``** | The Limit clause is used to limit the number of results. OpenMLDB currently only supports one parameter to limit the maximum number of rows of returned data. |

| SELECT statement elements | state | direction |
| :------------- | -------------------- | :----------------------------------------------------------- |
| LIMIT Clause | Online Serving is not supported | The Limit clause is used to limit the number of results. OpenMLDB currently only supports Limit accepting one parameter, indicating the maximum number of rows of returned data； |

## Example

### SELECT with LIMIT

```SQL
-- desc: SELECT Limit
SELECT t1.COL1 c1 FROM t1 limit 10;
```