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                # Db模型更新 更新數據,可以where 多個條件也可以使用wheredata ```java WhereData where_data = new WhereData(); where_data.put("uid",1); where_data.put("record_id",1); where_data.put("product_id",1); where_data.put("status",1); FieldData field_data = new FieldData(); field_data.put("status",2); field_data.put("visit_num",2); int re = Db.model(Dtp.class).where(where_data).update(field_data); ``` 更新某個字段值+1 ```java field_data.put("visit_num",visit_num+1); 或 field_data.putInc("visit_num",1); 或 field_data.putInc("visit_num"); ``` 更新字段-1 ```java field_data.put("visit_num",visit_num-2); 或 field_data.putDec("visit_num",1); 或 field_data.putDec("visit_num"); ```
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