我在调试我的 SQL 代码时遇到问题，以找出为什么我会产生“遇到除以零错误”。我相信在尝试除以空值并使用 NULLIF 时会发生此错误，据我所知是一种防止这种情况的方法。我的尝试一直不成功，并且可以在我的代码上使用一些额外的眼睛。SQL Server 数据库
SET NOCOUNT ON;
SELECT CAST(yr AS INT) AS yr ,
CAST(rs.RTRIM(D.bus_name) AS VARCHAR(100)) AS bus_name ,
CAST(rs.RTRIM(D.bus_code) AS VARCHAR(20)) AS bus_code ,
SUM(CAST(D.salary AS NUMERIC(18, 2))) AS bus_salary ,
SUM(D.total_assign) AS total_assignment
FROM (
--begin: table:D
SELECT C.bus_code ,
C.bus_name ,
C.sales_issue_id ,
SUM(CAST(C.salary AS NUMERIC(18, 2))) AS salary ,
MAX(total_fte) AS total_fte ,
SUM(C.assigned_fte) AS total_assign ,
MAX(total_salary) AS total_salary ,
C.yr
FROM (
--begin: table C:
SELECT B.sales_issue_id ,
B.last_name ,
B.firs.t_name ,
B.bus_code ,
B.bus_name ,
B.total_salary ,
B.assigned_fte ,
( B.total_salary * B.assigned_fte )
/ total_fte AS salary ,
B.total_fte ,
B.yr
FROM --table B:
(
--begin B:
SELECT tb_total_fte_salary.sales_issue_id ,
rs.bus_name ,
tb_total_fte_salary.total_fte ,
rs.region_code
+ rs.county_code
+ rs.bus_code AS bus_code ,
rs.last_name ,
rs.first_name ,
tb_total_fte_salary.total_salary ,
assigned_fte = CASE rs.assign_fte
WHEN '' THEN 0
ELSE CAST(rs.assign_fte AS NUMERIC(18,
2))
END ,
rs.yr
FROM dbo.raw_sales AS rs,
(
SELECT sales_issue_id ,
yr ,
MAX(last_name) AS last_name ,
MAX(first_name) AS first_name ,
SUM(CAST(assign_fte AS NUMERIC(18,
2))) AS total_fte ,
MAX(CAST(NULLIF(total_salary,
0) AS NUMERIC(18,
2))) AS total_salary
FROM raw_sales
GROUP BY sales_issue_id ,
yr
--end
) tb_total_fte_salary
WHERE rs.sales_issue_id = tb_total_fte_salary.sales_issue_id
AND rs.yr = tb_total_fte_salary.yr
--end B:
) B
--end C:
) C
GROUP BY C.sales_issue_id ,
C.last_name ,
first_name ,
C.bus_name ,
C.bus_code ,
C.yr
--end D:
) D
GROUP BY bus_code ,
bus_name ,
yr
ORDER BY yr ,
bus_code ,
bus_name