如果数据文件中的最后一列为空，则我的bcp应用程序出错。这会导致错误：
XX,YY,42,0,2,201501,652,,
这不是：
XX,YY,42,0,2,201501,652,,0
不幸的是我不能指定零而不是null。目标表允许每列都为null。数据类型是float（实际上最后三列是浮点数）。这是格式文件：
8.0
9
1 SQLCHAR 0 10 "," 1 NOT SQL_Latin1_General_CP1_CI_AS
2 SQLCHAR 0 10 "," 2 VIOLATING SQL_Latin1_General_CP1_CI_AS
3 SQLCHAR 0 10 "," 3 COMPANY SQL_Latin1_General_CP1_CI_AS
4 SQLCHAR 0 2 "," 4 POLICY SQL_Latin1_General_CP1_CI_AS
5 SQLCHAR 0 2 "," 5 ON SQL_Latin1_General_CP1_CI_AS
6 SQLCHAR 0 6 "," 6 INFORMATION SQL_Latin1_General_CP1_CI_AS
7 SQLCHAR 0 25 "," 7 SECURITY ""
8 SQLCHAR 0 25 "," 8 QTY2 ""
9 SQLCHAR 0 25 "\n" 9 QTY1 ""
错误：
Row 1, Column 9: Invalid character value for cast specification