操作数数据类型 varchar(max) 对于除法运算符无效

Question

下面是我尝试运行使用 Microsoft SQL Server Management Studio 的查询：

update [SG report] 
set [percentage_paid] = ([Savings This Season (All)] / [Savings Goal Amount]) * 100

Answer 1

update [SG report] 
set [percentage_paid] =  ([Savings This Season (All)] / [Savings Goal Amount]) * 100
where isnumeric([Savings This Season (All)])=1 and isnumeric([Savings Goal Amount])=1

Answer 2

您的一个或两个值都是字符串。使用 try_convert() 将它们转换为适当的类型。具体类型不清楚，大概是这样的：

update [SG report] 
    set [percentage_paid] =  (try_convert(float, [Savings This Season (All)])  * 100 /
                              try_convert(float, [Savings Goal Amount])
                             );

操作数数据类型 varchar(max) 对于除法运算符无效

Operand data type varchar(max) is invalid for divide operator

sql

sql-server

ssms