SqlServer Conversion failed when converting the nvarchar value ‘.‘ to data type int.
2024-06-05 18:25:57
一.报错信息：
Conversion failed when converting the nvarchar value ‘.’ to data type int.
翻译：转换nvarchar值“”时转换失败到数据类型int。
二.报错原因：
1.字段取数确实有问题，无法进行强制转换。
2.数据库算力不足，直接报错。
（我们下面细说2的解决方案）
三.解决方案：
解决方案一：
小部分数据（我碰到的是30w数据，字段截取后得到数字进行计算），算力不足：
添加自定义字段，Row_Number() Over(Order by 字段) FROWID：
案例如下：
select
ROW_NUMBER() Over( Order by c1.FNUMBER) FRowID,
c1.FNUMBER
,(case when c.F_add_Text222 ='' then 1 else (convert(int,(substring(c.F_add_Text,0,CHARINDEX('*',c.F_add_Text))))*convert(int,( substring(c.F_add_Text,CHARINDEX('*',c.F_add_Text)+1,len(c.F_add_Text ))))*0.000001)/( convert(int,(substring(c.F_add_Text222,0,CHARINDEX('*',c.F_add_Text222))))*convert(int,( substring(c.F_add_Text222,CHARINDEX('*',c.F_add_Text222)+1,len(c.F_add_Text222 ))))*0.000001) end) * FREALQTY FREALQTY
from T_PRD_INSTOCK a
left join T_PRD_INSTOCKENTRY b on a.FID = b.FID
left join T_BD_MATERIAL c on b.FMATERIALID = c.FMATERIALID
left join T_ENG_BOM d on c.FMATERIALID = d.FMATERIALID
left join T_ENG_BOMCHILD e on d.FID = e.FID
left join T_BD_MATERIAL c1 on e.FMATERIALID = c1.FMATERIALID
where a.FDOCUMENTSTATUS = 'C' and d.FDOCUMENTSTATUS = 'C'
and a.FDATE >= dateadd(month,-6,Convert(varchar(7),'2023-03-23',120)+ '-01')
and a.FDATE < Convert(varchar(7),'2023-03-23',120)+ '-01'
最终结果：成功得到数据。
解决方案二：
大部分数据计算或者算数公式过于复杂，算力不足：
添加中间临时表，分担计算压力：
案例如下：
1.临时表存在则删除
if exists (select 1 from sys.objects where name = 'theNowTable') begin drop table theNowTable end
2.创建临时表数据
select * into theNowTable from (select
ROW_NUMBER() Over( Order by c1.FNUMBER) RowID,c1.FNUMBER
,(case when c.F_add_Text222 ='' then 1 else (convert(int,(substring(c.F_add_Text,0,CHARINDEX('*',c.F_add_Text))))*convert(int,( substring(c.F_add_Text,CHARINDEX('*',c.F_add_Text)+1,len(c.F_add_Text ))))*0.000001)/( convert(int,(substring(c.F_add_Text222,0,CHARINDEX('*',c.F_add_Text222))))*convert(int,( substring(c.F_add_Text222,CHARINDEX('*',c.F_add_Text222)+1,len(c.F_add_Text222 ))))*0.000001) end) * FREALQTY FREALQTY
from T_PRD_INSTOCK a
left join T_PRD_INSTOCKENTRY b on a.FID = b.FID
left join T_BD_MATERIAL c on b.FMATERIALID = c.FMATERIALID
left join T_ENG_BOM d on c.FMATERIALID = d.FMATERIALID
left join T_ENG_BOMCHILD e on d.FID = e.FID
left join T_BD_MATERIAL c1 on e.FMATERIALID = c1.FMATERIALID
where a.FDOCUMENTSTATUS = 'C' and d.FDOCUMENTSTATUS = 'C' and c1.FForbidStatus = 'A' and c.FForbidStatus = 'A'
and a.FDATE >= dateadd(month,-6,Convert(varchar(7),'2023-03-23',120)+ '-01')
and a.FDATE < Convert(varchar(7),'2023-03-23',120)+ '-01'
union all
select --简单生产入库单
ROW_NUMBER() Over( Order by c1.FNUMBER) RowID,c1.FNUMBER
,(case when c.F_add_Text222 ='' then 1 else (convert(int,(substring(c.F_add_Text,0,CHARINDEX('*',c.F_add_Text))))*convert(int,( substring(c.F_add_Text,CHARINDEX('*',c.F_add_Text)+1,len(c.F_add_Text ))))*0.000001)/( convert(int,(substring(c.F_add_Text222,0,CHARINDEX('*',c.F_add_Text222))))*convert(int,( substring(c.F_add_Text222,CHARINDEX('*',c.F_add_Text222)+1,len(c.F_add_Text222 ))))*0.000001) end) * FREALQTY FREALQTY
from T_SP_INSTOCK a
left join T_SP_INSTOCKENTRY b on a.FID = b.FID
left join T_BD_MATERIAL c on b.FMATERIALID = c.FMATERIALID
left join T_ENG_BOM d on c.FMATERIALID = d.FMATERIALID
left join T_ENG_BOMCHILD e on d.FID = e.FID
left join T_BD_MATERIAL c1 on e.FMATERIALID = c1.FMATERIALID
where a.FDOCUMENTSTATUS = 'C' and d.FDOCUMENTSTATUS = 'C' and c1.FForbidStatus = 'A' and c.FForbidStatus = 'A'
and a.FDATE >= dateadd(month,-6,Convert(varchar(7),'2023-03-23',120)+ '-01')
and a.FDATE < Convert(varchar(7),'2023-03-23',120)+ '-01'
union all
select --生产退库单
ROW_NUMBER() Over( Order by c1.FNUMBER) RowID,c1.FNUMBER
,(case when c.F_add_Text222 ='' then 1 else (convert(int,(substring(c.F_add_Text,0,CHARINDEX('*',c.F_add_Text))))*convert(int,( substring(c.F_add_Text,CHARINDEX('*',c.F_add_Text)+1,len(c.F_add_Text ))))*0.000001)/( convert(int,(substring(c.F_add_Text222,0,CHARINDEX('*',c.F_add_Text222))))*convert(int,( substring(c.F_add_Text222,CHARINDEX('*',c.F_add_Text222)+1,len(c.F_add_Text222 ))))*0.000001) end) * FREALQTY * -1 FREALQTY
from T_PRD_RESTOCK a
left join T_PRD_RESTOCKENTRY b on a.FID = b.FID
left join T_BD_MATERIAL c on b.FMATERIALID = c.FMATERIALID
left join T_ENG_BOM d on c.FMATERIALID = d.FMATERIALID
left join T_ENG_BOMCHILD e on d.FID = e.FID
left join T_BD_MATERIAL c1 on e.FMATERIALID = c1.FMATERIALID
where a.FDOCUMENTSTATUS = 'C' and d.FDOCUMENTSTATUS = 'C' and c1.FForbidStatus = 'A' and c.FForbidStatus = 'A'
and a.FDATE >= dateadd(month,-6,Convert(varchar(7),'2023-03-23',120)+ '-01')
and a.FDATE < Convert(varchar(7),'2023-03-23',120)+ '-01'
union all
select --简单生产退库单
ROW_NUMBER() Over( Order by c1.FNUMBER) RowID,c1.FNUMBER
,(case when c.F_add_Text222 ='' then 1 else (convert(int,(substring(c.F_add_Text,0,CHARINDEX('*',c.F_add_Text))))*convert(int,( substring(c.F_add_Text,CHARINDEX('*',c.F_add_Text)+1,len(c.F_add_Text ))))*0.000001)/( convert(int,(substring(c.F_add_Text222,0,CHARINDEX('*',c.F_add_Text222))))*convert(int,( substring(c.F_add_Text222,CHARINDEX('*',c.F_add_Text222)+1,len(c.F_add_Text222 ))))*0.000001) end) * FOUTQTY * -1 FOUTQTY
from T_SP_OUTSTOCK a
left join T_SP_OUTSTOCKENTRY b on a.FID = b.FID
left join T_BD_MATERIAL c on b.FMATERIALID = c.FMATERIALID
left join T_ENG_BOM d on c.FMATERIALID = d.FMATERIALID
left join T_ENG_BOMCHILD e on d.FID = e.FID
left join T_BD_MATERIAL c1 on e.FMATERIALID = c1.FMATERIALID
where a.FDOCUMENTSTATUS = 'C' and d.FDOCUMENTSTATUS = 'C' and c1.FForbidStatus = 'A' and c.FForbidStatus = 'A'
and a.FDATE >= dateadd(month,-6,Convert(varchar(7),'2023-03-23',120)+ '-01')
and a.FDATE < Convert(varchar(7),'2023-03-23',120)+ '-01') tab
3.用临时表计算获得最终数据：
select FNUMBER,sum(FREALQTY) FREALQTY from theNowTable group by FNUMBER
having sum(FREALQTY) >= 4200
最终结果：成功得到数据。
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