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#### 汇总 count ~~~ $count = Be::getTable('oms_order') ->where('create_time', '>', '2017-12-01') ->count(); ~~~ 等效SQL: ~~~ SELECT COUNT(*) FROM oms_order WHERE create_time > '2017-12-01' ~~~ #### 对指定字段汇总 ~~~ $count = Be::getTable('oms_order') ->where('create_time', '>', '2017-12-01') ->count('user_id'); ~~~ 等效SQL: ~~~ SELECT COUNT(user_id) FROM oms_order WHERE create_time > '2017-12-01' ~~~