SELECT rows FROM sysindexes WHERE id = OBJECT_ID('table_name

来源：学生作业帮编辑：作业帮分类：数学作业时间：2024/07/13 13:56:47

SELECT rows FROM sysindexes WHERE id = OBJECT_ID('table_name') AND indid < 2
求 id = OBJECT_ID('table_name') AND indid < 2 中 id 具体指什么是指那个表的字段?还有indid 为什么小于2 为什么我运行出错呢求详解

sysindexs 是对数据库里的数据表、索引的一个对应表.id 即是给它们定义的编号.
这句话的意思是查找’table_name‘这个表的数据总行数.
而indid是指它的指索引ID的类型： 0:堆 1:聚集索引 >1: 非聚集索引,一般情况下表的indid是0,所以加了一个 indid < 2

select id,name from student where id in ( select id from sco select ** from A where A.id in (select id from B where ****) $id="select id from account where name='".$_SESSION['login'] $query = mysql_query( select * from 表名 where id='$_GET[id]' sql 中 select * from A left join B on A.id=B.id where A.id=?如 sql="select * from "&data&" where id="&myid&"" 在数据库中没有data 这 SELECT COUNT(*) FROM Users WHERE Id={0} AND LoginPwd = '{1}' select distinct id from names where tid = 'AREACODE' And dsc select distinct A.* from A,B where A.id = B.g_id and A.fwzid 请教sql语句,像select …from wsdy_zb t where t.id =:id order by no sql如何取交集有这样两条sql语句select distinct id from a where id='123'se delete from A where a_id in (select id from B where b_id in