I created the procedure listed below:
CREATE procedure getdata
(
@ID int,
@frm varchar(250),
@to varchar(250)
)
AS
BEGIN
DECLARE @SQL nvarchar(500)
set @SQL = 'select'
set @SQL = @SQL + ' EmpName, Address, Salary from Emp_Tb where 1=1 '
IF (@ID <> '' and @ID is not null)
Begin
SET @sql=@sql+' AND Emp_Id_Pk=' +@ID
End
END
print @sql
--execute (@sql)
I try to execute it using:
**execute getdata 3,'','';**
But I'm getting the following error:
Conversion failed when converting the nvarchar value 'select EmpName, Address, Salary from Emp_Tb where 1=1 AND Emp_Id_Pk=' to data type int
Please help.
This question is related to
sql
You are trying to concatenate a string and an integer.
You need to cast @ID
as a string.
try:
SET @sql=@sql+' AND Emp_Id_Pk=' + CAST(@ID AS NVARCHAR(10))
Try Using
CONVERT(nvarchar(10),@ID)
This is similar to cast but is less expensive(in terms of time consumed)
don't use string concatenation to produce sql, you can use sp_executesql
system stored prcedure to execute sql statement with parameters
create procedure getdata @ID int, @frm varchar(250), @to varchar(250) as
begin
declare @sql nvarchar(max), @paramDefs nvarchar(max);
set nocount on;
set @sql = N'select EmpName, Address, Salary from Emp_Tb where @id is null or Emp_Id_Pk = @id';
set @paramDefs = N'@id int';
execute sp_executesql @sql, @paramDefs, @id = @ID;
end
see sp_executesql
I was using a KEY word for one of my columns and I solved it with brackets []
I got this error when I used a where clause which looked at a nvarchar field but didn't use single quotes.
My invalid SQL query looked like this:
SELECT * FROM RandomTable WHERE Id IN (SELECT Id FROM RandomTable WHERE [Number] = 13028533)
This didn't work since the Number column had the data type nvarchar. It wasn't an int as I first thought.
I changed it to:
SELECT * FROM RandomTable WHERE Id IN (SELECT Id FROM RandomTable WHERE [Number] = '13028533')
And it worked.
I use the latest version of SSMS or sql server management studio. I have a SQL script (in query editor) which has about 100 lines of code. This is error I got in the query:
Msg 245, Level 16, State 1, Line 2
Conversion failed when converting the nvarchar value 'abcd' to data type int.
Solution - I had seen this kind of error before when I forgot to enclose a number (in varchar column) in single quotes.
As an aside, the error message is misleading. The actual error on line number 70 in the query editor and not line 2 as the error says!
You got this Error because you tried to convert column DataType
from String
to int
which is
leagal if and only if
you dont have row in that table with string content inside that column
so just make sure your previously inserted Rows is compatible with the new changes
Source: Stackoverflow.com