column() public method (available since version 2.1.2)
Executes the query and returns the first column of the result.
Column _id will be automatically excluded from select fields, if select() is not empty and _id is not selected explicitly.
| public array column ( $db = null ) | ||
|---|---|---|
| $db | yii\mongodb\Connection |
The MongoDB connection used to generate the query. If this parameter is not given, the |
| return | array |
The first column of the query result. An empty array is returned if the query results in nothing. |
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