Adding new records the insert command only requires the current values since no original record exists and removing records the delete command only requires the original values in order to locate the record to delete 由于不存在初始记录,添加新记录( insert命令)只需要当前值;移除记录( delete命令)只需要使用初始值来定位要删除的记录。
In some situations , the select statement does not provide enough information for the adapter to generate the commands necessary to create the insert , update , and delete commands required for a successful save 某些情况下,对于成功保存所需要的insert 、 update和delete命令, select语句不会为适配器提供足够的信息以生成创建这些命令所必需的命令。
From there , it will ignore the tsqldataset component which is read - only and unidirectional , and will produce a sql update , insert , and or delete command which is sent directly to the db2 udb sample database through the tsqlconnection component 在那里,它将忽略tsqldataset组件(该组件是只读的、单向的) ,并产生一个sql更新、插入和/或删除命令,这些命令将通过tsqlconnection组件被直接发送给db2 udb sample数据库。