scalar() public method (available since version 2.1.2)
Returns the query result as a scalar value.
The value returned will be the first column in the first row of the query results. Column _id will be automatically excluded from select fields, if select() is not empty and _id is not selected explicitly.
| public string|null|false scalar ( $db = null ) | ||
|---|---|---|
| $db | yii\mongodb\Connection |
The MongoDB connection used to generate the query. If this parameter is not given, the |
| return | string|null|false |
The value of the first column in the first row of the query result. |
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