Question

这是我的简单查询。我需要通过field1和field2对结果进行排序，但总结一下。所以如果结果如此 FIELD1 = 5 FIELD2 = 2 和 FIELD1 = 6 FIELD2 = 4

它应该将它们（5 + 2）和（6 + 4），（7）和（10）相加，然后按顺序递减。前10然后7

    SELECT 
        COUNT(table1.ID) AS field1,  
        COUNT(table2.ID) AS field2,
    FROM table3
    LEFT JOIN table1 ON (table3.ID=table1.IDv) 
    LEFT JOIN table2 ON (table3.ID=table2.IDv)  
    GROUP BY table3.ID
    ORDER BY field1+field2 DESC

Answer 1

您是否介意再添加一列，例如

SELECT 
    COUNT(table1.ID) AS field1,  
    COUNT(table2.ID) AS field2,
    COUNT(table1.ID) + COUNT(table2.ID) AS field3
FROM table3
LEFT JOIN table1 ON (table3.ID=table1.IDv) 
LEFT JOIN table2 ON (table3.ID=table2.IDv)  
GROUP BY table3.ID
ORDER BY field3 DESC

计数字段的总和

1 个答案: