问题
Why do I get this error
Procedure expects parameter '@statement' of type 'ntext/nchar/nvarchar'.
when I try to use sp_executesql?
回答1:
Sounds like you're calling sp_executesql with a VARCHAR statement, when it needs to be NVARCHAR.
e.g. This will give the error because @SQL needs to be NVARCHAR
DECLARE @SQL VARCHAR(100)
SET @SQL = 'SELECT TOP 1 * FROM sys.tables'
EXECUTE sp_executesql @SQL
So:
DECLARE @SQL NVARCHAR(100)
SET @SQL = 'SELECT TOP 1 * FROM sys.tables'
EXECUTE sp_executesql @SQL
回答2:
The solution is to put an N in front of both the type and the SQL string to indicate it is a double-byte character string:
DECLARE @SQL NVARCHAR(100)
SET @SQL = N'SELECT TOP 1 * FROM sys.tables'
EXECUTE sp_executesql @SQL
来源：https://stackoverflow.com/questions/2743890/why-do-i-get-procedure-expects-parameter-statement-of-type-ntext-nchar-nvar