Android SQLite：我可以将这四个SQLite查询合并为一个吗？

Question

他们都在查询同一个表，一个选择结果数量，另一组查询选择最小值。

可以这样conslidated到一个查询

 likeNewTotal = db.getSingleValue("SELECT COUNT(*) FROM Offers WHERE subCondition = 'likenew'"); 
    veryGoodTotal = db.getSingleValue("SELECT COUNT(*) FROM Offers WHERE subCondition = 'verygood'"); 
goodTotal = db.getSingleValue("SELECT COUNT(*) FROM Offers WHERE subCondition = 'good'"); 
    acceptableTotal = db.getSingleValue("SELECT COUNT(*) FROM Offers WHERE subCondition = 'acceptable'"); 

    likeNewLow = db.getSingleValue("SELECT MIN(price) FROM Offers WHERE subCondition = 'likenew'"); 
     veryGoodLow = db.getSingleValue("SELECT MIN(price) FROM Offers WHERE subCondition = 'verygood'"); 
    goodLow = db.getSingleValue("SELECT MIN(price) FROM Offers WHERE subCondition = 'good'"); 
    acceptableLow = db.getSingleValue("SELECT MIN(price) FROM Offers WHERE subCondition = 'acceptable'"); 

Answer 1

您可能正在寻找GROUP BY功能：

SELECT subCondition,COUNT(*),MIN(price) FROM Offers GROUP BY subCondition; 

这会给你的COUNT（*）和MIN（价格）针对subCondition中的所有不同值。