如何将此SQL子查询包含在绝对数字的值中？

Question

我为Access DB编写了这个查询。

queryText = "SELECT Technicians.ID, firstName, lastName, Technicians.[Zone],
COUNT(technicianAssignedId) AS JobsDone, 
MAX(Faults.timeCompleted) AS LastJobTime,
MIN(Technicians.[Zone] - & faultZone &) AS Distance ' MIN has no use
FROM Technicians LEFT OUTER JOIN Faults ON
Technicians.ID = Faults.technicianAssignedID 
WHERE Specialization = '" & specialization & "'
`AND Availability = 'available' 
GROUP BY Technicians.ID, firstName, lastName, Availability,` Technicians.[Zone], Specialization 
ORDER BY 7 DESC"

我有这个获得绝对值

SELECT CASE
WHEN value < 0 THEN value * -1
ELSE number *1 END
AS VALUE
FROM DB;

现在使用Distance别名的列可能会以负数表结尾，我需要使用（* -1）作为正数，但我无法弄清楚如何将它们组合在一起。

感谢您的帮助

Answer 1

试

ABS(Technicians.[Zone] - & faultZone &) AS Distance 

请参阅ABS doc

Answer 2

为什么不能只使用绝对函数ABS？

Answer 3

ABS（）适用于所有SQL版本