Question

我有多个条件，我想检查数据库列，我可以这样做吗？

(SELECT COUNT(*) FROM PscData where SETTLEMENT_ID = T.SETTLEMENT_ID AND NO_OF_BUFFALO >= 1
            AND NO_OF_COW >= 1
            AND NO_OF_GOAT >= 1
            AND NO_OF_SHEEP >= 1
            ) as At_Least_1_Buffalo_Bullock_Cow_Goat_Sheep

它没有给我准确的答案。我想从我的数据中得到总计数，其中至少有1头牛，山羊，绵羊或水牛。

Answer 1

OR子句

中需要AND而不是WHERE

SELECT COUNT(*) FROM PscData where SETTLEMENT_ID  = T.SETTLEMENT_ID AND (
        NO_OF_BUFFALO >= 1
            OR NO_OF_COW >= 1
            OR NO_OF_GOAT >= 1
            OR NO_OF_SHEEP >= 1)

Answer 2

@Eralper有一种方法，但逻辑上我认为这描述了你想要的更好

(SELECT COUNT(*) FROM PscData where SETTLEMENT_ID = T.SETTLEMENT_ID AND  (NO_OF_BUFFALO >= 1
            OR NO_OF_COW >= 1
            OR NO_OF_GOAT >= 1
            OR NO_OF_SHEEP >= 1
            ) ) as At_Least_1_Buffalo_Bullock_Cow_Goat_Sheep

请注意，OR而不是AND用于单独的条件。

Answer 3

我认为你要找的是查询

SELECT COUNT(*) 
FROM PscData 
where 
SETTLEMENT_ID = T.SETTLEMENT_ID AND 
( NO_OF_BUFFALO + NO_OF_COW + NO_OF_GOAT + NO_OF_SHEEP) >= 1
--SUM( NO_OF_BUFFALO + NO_OF_COW + NO_OF_GOAT + NO_OF_SHEEP) >= 1

很抱歉打字错误，我们在这里不需要SUM（）函数，我对此进行了评论。

在where子句中使用多个AND运算符

3 个答案: