public static String getKeysWhereSQL(Class<?> clazz) 
			throws NoKeyColumnAnnotationException {
		List<Field> keyFields = DOInfoReader.getKeyColumns(clazz);
		String where = joinWhere(keyFields, "AND");
		return autoSetSoftDeleted("WHERE " + where, clazz);
	}
public static String getKeysWhereSQL ( Class < ? > clazz ) throws NoKeyColumnAnnotationException { List < Field > keyFields = DOInfoReader . getKeyColumns ( clazz ) ; String where = joinWhere ( keyFields , "AND" ) ; return autoSetSoftDeleted ( "WHERE " + where , clazz ) ; }
获得主键where子句，包含where关键字。会自动处理软删除条件

@param clazz
@throws NoKeyColumnAnnotationException