CollectionFind::having

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CollectionFind::having — Set condition for aggregate functions

说明

public mysql_xdevapi\CollectionFind::having ( string $sort_expr ) : mysql_xdevapi\CollectionFind

This function can be used after the 'field' operation in order to make a selection on the documents to extract.

参数

sort_expr: This must be a valid SQL expression, the use of aggreate functions is allowed

返回值

CollectionFind object that can be used for further processing

范例

Example #1 mysql_xdevapi\CollectionFind::having() example


<?php

//Assuming $coll is a valid Collection object

//Find all the documents for which the 'age' is greather than 40,
//Only the columns 'name' and 'age' are returned in the Result object
$res = $coll->find()->fields(['name','age'])->having('age > 40')->execute();

?>