添加两个具有负值的sum case语句

Question

我正在尝试添加两个带有onyl负值的select语句，这些是语句：

SUM(CASE WHEN LinkAcc = '8420000' THEN amount < 0 END) 
SUM(CASE WHEN LinkAcc = '8400000' THEN amount < 0 END) AS Payments

我试过了：

    SUM(CASE WHEN LinkAcc = '8400000,8420000' THEN amount < 0 END) AS Payments

Answer 1

THEN amount < 0没有多大意义。如果我理解正确，你想要的是：

SUM(CASE 
       WHEN LinkAcc IN ('8420000','8400000') AND amount < 0 
       THEN amount 
    END) As Payments