Select the total Price input field, press the Ctrl key, and click the Subtotal column header label.
选择totalPrice输入字段,按下ctrl键,然后单击subtotal列标题标签。
For each non-NULL variable-length field, the record header contains the length of the column in one or two bytes.
对于每个非空的变长字段,记录头使用一或两个字节包含了列的长度。
For each non-NULL variable-length field, the record header contains the length of the column in one or two bytes.
对于每个非空的变长字段,记录头使用一或两个字节包含了列的长度。
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