SQLForeignKeys
Applies to: 
SQL Server
Azure SQL Database
Azure SQL Managed Instance
Azure Synapse Analytics
Analytics Platform System (PDW)
SQL Server supports cascading updates and deletes through the foreign key constraint mechanism. SQL Server returns SQL_CASCADE for UPDATE_RULE and/or DELETE_RULE columns if CASCADE option is specified on the ON UPDATE and/or ON DELETE clause of the FOREIGN KEY constraints. SQL Server returns SQL_NO_ACTION for UPDATE_RULE and/or DELETE_RULE columns if NO ACTION option is specified on the ON UPDATE and/or ON DELETE clause of the FOREIGN KEY constraints.
When invalid values are present in any SQLForeignKeys parameter, SQLForeignKeys returns SQL_SUCCESS on execution. SQLFetch returns SQL_NO_DATA when invalid values are used in these parameters.
SQLForeignKeys can be executed on a static server cursor. An attempt to execute SQLForeignKeys on an updatable (dynamic or keyset) cursor returns SQL_SUCCESS_WITH_INFO indicating that the cursor type has been changed.
The SQL Server Native Client ODBC driver supports reporting information for tables on linked servers by accepting a two-part name for the FKCatalogName and PKCatalogName parameters: Linked_Server_Name.Catalog_Name.