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# Method name: limit(limit: number)

# Method package: wixData

# Method menu location: wixData --> WixDataAggregate --> limit

# Method Link: https://dev.wix.com/docs/velo/apis/wix-data/wix-data-aggregate/limit.md

# Method Description:

Limits the number of items or groups the aggregation returns.

The `limit()` function defines the number of results an aggregation returns in each
 page. Only one page of results is retreived at a time. The [`next()`](wix-data.WixDataQueryResult.html)
 function is used to navigate the pages of a query result.

 By default, `limit` is set to `50`.

 The maximum value that `limit()` can accept is `1000`.
 > **Note:** Aggregations can only be used on collections you have created. They cannot be
 used on [Wix App Collections](https://support.wix.com/en/article/cms-formerly-content-manager-working-with-wix-app-collections).



# Method Code Examples:

*** Note: do not assume any prop names or enum values other than the ones in the example.

## Add a limit to an aggregation

```javascript
let newAggregate = aggregate.limit(3);
```

## Create an aggregate, add a limit, and run it

```javascript
import wixData from 'wix-data';

// ...

wixData.aggregate("PopulationData")
  .group("state", "year")
  .max("population")
  .limit(3)
  .run()
  .then((results) => {
    if (results.items.length > 0) {
      let items = results.items;        // see below
      let numItems = results.length;    // 3
      let hasNext = results.hasNext();  // true
    } else {
      // handle case where no matching items found
    }
  })
  .catch((error) => {
    let errorMsg = error.message;
    let code = error.code;
  });

/* Given the sample data above, items is:
 * [
 *   {
 *     "_id": {"state": "NY", "year": 2000},
 *     "populationMax":8015000,
 *     "state": "NY",
 *     "year": 2000
 *   }, {
 *     "_id": {"state": "FL", "year": 2000},
 *     "populationMax":362000,
 *     "state": "FL",
 *     "year": 2000
 *   }, {
 *     "_id": {"state": "NY", "year": 2010},
 *     "populationMax":3703000,
 *     "state": "NY",
 *     "year": 2010
 *   }
 * ]
 */
```

## Create an aggregation with filtering and grouping and run it

```javascript
import wixData from 'wix-data';

// ...

const filter = wixData.filter().eq("year", 2010);
const having = wixData.filter().gt("maxPopulation", 1000000);

wixData.aggregate("PopulationData")
  .filter(filter)
  .group("state")
  .max("population", "maxPopulation")
  .having(having)
  .descending("maxPopulation")
  .skip(5)
  .limit(3)
  .run()
  .then((results) => {
    if (results.items.length > 0) {
      let items = results.items;
      let numItems = results.length;
      let hasNext = results.hasNext();
    } else {
      // handle case where no matching items found
    }
  })
  .catch((error) => {
    let errorMsg = error.message;
    let code = error.code;
  });
```

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