将nvarchar转换为int时转换失败

您还需要在WHERE子句中执行检查和转换:

SELECT 
       id, 
       CASE WHEN isnumeric([other08]) = 1 THEN CAST([other08] AS INT) ELSE 0 END
FROM   CER 
WHERE  sourcecode LIKE 'ANE%' 
AND CASE WHEN isnumeric([other08]) = 1 THEN CAST([other08] AS INT) ELSE 0 END > 720

select id, case(isnumeric([other08])) when 1 then [other08] else 0 end
from CER 
where sourcecode like 'ANE%' and ISNUMERIC(other08) = 1 and other08 > 720

正如@abs指出的那样,上述方法不起作用。但是,我们可以使用CTE计算要过滤的可靠字段:

WITH Data AS (
  select id
    , case WHEN isnumeric([other08]) THEN CAST([other08] AS int) else 0 end AS FilteredOther08
    , CER.* 
  from CER 
  where sourcecode like 'ANE%'
)
SELECT *
FROM Data
WHERE [FilteredOther08] > 720