1# Rdb_KeyInfo 2 3## Overview 4 5Defines a struct for the primary key or number of the row that changes. 6 7**Since**: 11 8 9**Related module**: [RDB](capi-rdb.md) 10 11**Header file**: [relational_store.h](capi-relational-store-h.md) 12 13## Summary 14 15### Member Variables 16 17| Name | Description | 18| -------------------------------------------- | ------------------------------------------------------------ | 19| int count | Number of the changed primary keys or row numbers. | 20| int type | Type of the primary key. For details, see [OH_ColumnType](capi-oh-data-value-h.md#oh_columntype). | 21| [Rdb_KeyData](capi-rdb-rdb-keydata.md)* data | Holds the changed data. | 22