一、使用if条件限制查询条件 

$query = Db::table('wip_operation_plan')->alias('d')->join(['wip_jobs_all' => 'a'], 'a.wip_entity_name = d.wip_entity_name')->join(['sf_item_no' => 'c'], 'a.primary_item=c.item_no')->field('d.*,c.item_no as item_no,c.item_name as item_name,c.units as uom,d.creation_date creation_date,a.creation_date as wip_creation_date')->where(['d.wip_entity_name'  =>  ['like', '%' . $like_info . '%']])->where('d.begin_quantity > d.output_quantity+d.bad_quantity');//添加条件if (!empty($search_itemno)) {$query->where(['c.item_no'  =>  ['like', '%' . $search_itemno . '%']]);}if (!empty($search_itemname)) {$query->where(['c.item_name'  =>  ['like', '%' . $search_itemname . '%']]);}if (!empty($search_wip)) {$query->where(['d.wip_entity_name'  =>  ['like', '%' . $search_wip . '%']]);}if (!empty($search_opnum)) {$query->where(['d.operation_seq_num'  =>  ['like', '%' . $search_opnum . '%']]);}$query->limit($start, $pageSize)->order('a.wip_entity_name asc, d.operation_seq_num asc');$data['info'] = $query->select();

二、直接在数据库查询中写入三目运算

$data['total'] = Db::table('wip_operation_plan')->alias('d')->join(['wip_jobs_all' => 'a'], 'a.wip_entity_name = d.wip_entity_name')->join(['sf_item_no' => 'c'], 'a.primary_item=c.item_no')->where(['d.wip_entity_name'  =>  ['like', '%' . $like_info . '%']])->where('d.begin_quantity > d.output_quantity+d.bad_quantity')->where(!empty($search_itemno) ? ['c.item_no' => ['like', '%' . $search_itemno . '%']] : [])->where(!empty($search_itemname) ? ['b.item_name' => ['like', '%' . $search_itemname . '%']] : [])->where(!empty($search_wip) ? ['d.wip_entity_name' => ['like', '%' . $search_wip . '%']] : [])->where(!empty($search_opnum) ? ['d.operation_seq_num' => ['like', '%' . $search_opnum . '%']] : [])->count();