查询android系统数据库 自定义sql语句 办法
Cursor draftCursor = mResolver.query(Uri.parse("content://sms"),
new String[] {"canonical_addresses.address " +
"from sms,threads,canonical_addresses " +
"where sms.thread_id=threads._id and threads.recipient_ids=canonical_addresses._id and sms._id ='" +
String.valueOf(target_message_id) + "' --"},
null, null, null);
有点耍滑头,是吧,用到了sql语句中注释符号“--”
这样我们就将这个语句转化为了:
select canonical_addresses.address from sms,threads,canonical_addresses where sms.thread_id=threads._id and threads.recipient_ids=canonical_addresses._id and sms._id = 'target_message_id' -- from sms
在sql语句解析的时候,--from sms是不予解析的,所以就成功执行了前面的联合查询操作而得到了我们想要的canonical_addresses表中的address数据。
引用原文:http://blog.csdn.net/zhangzh332/article/details/6396985