Disallowed implicit conversion from data type to data type, table '', column ''. Use the CONVERT function to run this query.

If we will execute following sql query in sql server:

DECLARE @Today AS DATETIME = GETDATE()

DECLARE @Second  AS INTEGER

SET @Second = @Today

SET @Second = CAST(@Today AS INT)

We will get error message :

Disallowed implicit conversion from data type to data type, table '', column ''. Use the CONVERT function to run this query.

Cause: Implicit conversion of datetime data type to int, small int, bit etc. is not possible. We have to explicitly type cast in int.

Solution:

SET @Second = CAST(@Today AS INT)

Or

SET @Second = CONVERT(INT,@Today)