Default, minimum, and maximum values for exp_row_size

Table 9-6 shows the minimum and maximum values for expected row size and the meaning of the special values 0 and 1.

**Table 9-6: Valid values for expected row size**
exp_row_size values	Minimum, maximum, and special values
Minimum	The greater of: 2 bytes The sum of all fixed-length columns
Maximum	Maximum data row length
0	Use server-wide default value
1	Fully pack all pages; do not reserve room for expanding rows

You cannot specify an expected row size for tables that have fixed-length columns only. Columns that accept null values are by definition variable-length, since they are zero-length when null.