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。

youdao

Next check if the cursor contains records and if so loop through them. The record ID field is stored in the id variable. This will be used as a where parameter later.

下一步检查游标是否包含记录，如果包含记录，侧记录ID字段的值存储在ID变量中。

youdao

Next check if the cursor contains records and if so loop through them. The record ID field is stored in the id variable. This will be used as a where parameter later.

下一步检查游标是否包含记录，如果包含记录，侧记录ID字段的值存储在ID变量中。

youdao