bigint 带符号的范围是-9223372036854775808到9223372036854775807。无符号的范围是0到18446744073709551615。 int 普通大小的整数。带符号的范围是-2147483648到2147483647。无符号的范围是0到4294967295。就是值得范围的问题，如果需要大于int的范围，就用bigint.
是这样，我们对数字型字段的需求大约也就几万条吧。看来用int就够了。谢谢。
Name: 'INT' Description: INT[(M)] [UNSIGNED] [ZEROFILL]
A normal-size integer. The signed range is -2147483648 to 2147483647. The unsigned range is 0 to 4294967295. Name: 'BIGINT' Description: BIGINT[(M)] [UNSIGNED] [ZEROFILL]
A large integer. The signed range is -9223372036854775808 to 9223372036854775807. The unsigned range is 0 to 18446744073709551615.
int 普通大小的整数。带符号的范围是-2147483648到2147483647。无符号的范围是0到4294967295。就是值得范围的问题，如果需要大于int的范围，就用bigint.
Description:
INT[(M)] [UNSIGNED] [ZEROFILL]
A normal-size integer. The signed range is -2147483648 to 2147483647.
The unsigned range is 0 to 4294967295.
Name: 'BIGINT'
Description:
BIGINT[(M)] [UNSIGNED] [ZEROFILL]
A large integer. The signed range is -9223372036854775808 to
9223372036854775807. The unsigned range is 0 to 18446744073709551615.