Question

How do I compare datetime variable passed to the store procedure with datetime variable in the table.

e.g. In my where clause @paramDate value is 2/10/2012

 set sql = 'WHERE product.RegisteredDate >= ' + @paramDate

when I exec(@sql)

it fails, Error:

 Conversion failed when converting datetime from character string.

Thx

Answer 1

SET @sql = '... WHERE product.RegisteredDate >= ''' 
    + CONVERT(CHAR(8), @paramDate, 112) + ''';';

If @ParamDate is NULL you can probably do this:

SET @sql = 'SELECT ...';

SET @sql = @sql + COALESCE(' WHERE product.RegisteredDate >= '''
    + CONVERT(CHAR(8), @paramDate, 112) + ''';', '');

Or even:

SET @sql = 'SELECT ...';

IF @paramDate IS NOT NULL
BEGIN
    SET @sql = @sql + '... WHERE product.RegisteredDate >= ''' 
        + CONVERT(CHAR(8), @paramDate, 112) + ''';';
END