小编Oli*_*ini的帖子

I'm having a problem specifying a value within an OPTIMIZE FOR statement. I'd like to optimize the query with the value as a string, but I must be doing something wrong, because SQL gives the following error:

在 OPTIMIZE FOR 子句中为变量“@test”指定的值无法隐式转换为该变量的类型。

下面的示例有点人为，但问题与我在实际查询中遇到的问题相同。

declare @TEMP table(asWord nvarchar(max), asNumber int)

insert into @TEMP (asWord, asNumber) values (
    'one',
    1
), (
    'two',
    2
)

DECLARE @test nvarchar(max)
SET @test = 'one'

select * from @TEMP
where asWord = @test
OPTION (OPTIMIZE FOR(@test …