Initializes a System.Data.IDbCommand object to query for the count of Leadtools.Medical.ExternalStore.DataAccessLayer.DataTypes.ExternalStoreInstance that need to be cleared from the 'Local Store'
command
Type: System.Data.IDbCommand The database command that will be initialized to execute the query.
expirationDays
Number of days the dataset remains in the 'Local Store' before it expires.