# Collection.or()

#### Syntax

```javascript
collection.or(indexOrPrimaryKey)
```

#### Parameters

| indexOrPrimaryKey: String | Name of an index or primary key registered in Version.stores() |
| ------------------------- | -------------------------------------------------------------- |

#### Return Value

WhereClause

#### Sample

```javascript
db.friends.where("name")
  .equalsIgnoreCase("david")
  .or("shoeSize")
  .above(40)
  .sortBy("shoeSize")
```

#### Limitations

The sort order of the resulting collection will be undefined since the collection works on multiple indexes. To canonicalize the sort order, use the Collection.sortBy() method.

#### Implementation Details

This is implemented using parallel query execution and duplicate removals. For details, read [this article](http://www.codeproject.com/Articles/744986/How-to-do-some-magic-with-indexedDB)