If I use something like
开发者_C百科[ntext2] <> '1,032.5',
I get this error:
The data types ntext and varchar are incompatible in the not equal to operator.
The best possible solution would be if comparison is implemented in the same way for any column type. (<> operator is applicable for both NVARCHAR and INT).
The ntext
data type is deprecated in favour of the nvarchar(max)
data type. If you can change the data type in the table, that would be the best solution. Then there is no problem comparing it to a varchar
literal.
Otherwise you would have to cast the value before comparing it:
cast([ntext2] as nvarchar(max)) <> '1,032.5'
You might also consider using a nvarchar literal, which solves some similar data type problems:
cast([ntext2] as nvarchar(max)) <> N'1,032.5'
If you would prefer not to cast, you can get by in some scenarios using LIKE
or PATINDEX
, as demonstrated on this MSDN thread: http://social.msdn.microsoft.com/Forums/en-US/transactsql/thread/6bd4c661-ea0b-435f-af78-097e61549d41
The LIKE expression, without wildcards, would be (in this case) roughly equivalent to a test for equality.
In this case, the expression would be:
[ntext2] NOT LIKE '1,032.5'
精彩评论