sql - 将 varchar 值转换为数据类型 int 时转换失败

Question

我有一个 varchar(1000) 列，声明为包含所有数字的字段，如下所示。我想执行以下脚本。我需要这个才能工作

Declare @PostalCode varchar(1000)=0
    set @PostalCode ='7005036,7004168,7002314,7001188,6998955'

Select hl.* From CountryLocation cl
INNER JOIN refPostalCodes pc ON pc.PostalCode = hl.PostalCode
where pc.Postalcode in (@PostalCode) and pc.notDeleted = 1

Answer 1

您似乎想使用 sp_executesql :

Declare @PostalCode varchar(1000)=0
    set @PostalCode ='7005036,7004168,7002314,7001188,6998955'

declare @sql nvarchar(4000)  //didn't count the chars...

select @sql = N'Select hl.* From CountryLocation cl
INNER JOIN refPostalCodes pc ON pc.PostalCode = hl.PostalCode
where pc.Postalcode in (' + @PostalCode + ') and pc.notDeleted = 1'

exec sp_executesql @sql

以这种方式编码时，您需要非常小心注意 SQL 注入(inject)。