CodeIgniter active record not equal - CodeIgniter active record not equal

problem ：

In CodeIgniter using active record, how do I perform a not equal to in $this->db->where() . Using active records CodeIgniter in , How to be in $this->db->where() Execution does not equal .For instance: for example ：

$this->db->where('emailsToCampaigns.campaignId', $campaignId);

Will do equal to, but I need not equal to. Can do equal , But I don't need to be equal to .I have tried: I tried ：

$this->db->where('emailsToCampaigns.campaignId <> ', $campaignId);$this->db->where('emailsToCampaigns.campaignId != ', $campaignId);$this->db->where('emailsToCampaigns.campaignId', ' != ' . $campaignId);$this->db->where('emailsToCampaigns.campaignId != ' . $campaignId);

All with no luck. No luck at all .Ideas? idea ？

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Solution ：

Reference resources ： https://stackoom.com/en/question/LvaX