SQL计算表中的行数

Question

我需要向数据库发送一个SQL查询,告诉我表中有多少行.我可以使用SELECT获取表中的所有行,然后对它们进行计数,但我不喜欢这样做.是否有其他方法可以将表中的行数询问SQL服务器？

Answer 1

是, SELECT COUNT(*) FROM TableName

Answer 2

这是查询

select count(*) from tablename

或者

select count(rownum) from student

Answer 3

select sum([rows])
from sys.partitions
where object_id=object_id('tablename')
 and index_id in (0,1)

是非常快但很少不准确.

Answer 4

使用此查询：

Select
    S.name + '.' + T.name As TableName ,
    SUM( P.rows ) As RowCont 

From sys.tables As T
    Inner Join sys.partitions As P On ( P.OBJECT_ID = T.OBJECT_ID )
    Inner Join sys.schemas As S On ( T.schema_id = S.schema_id )
Where
    ( T.is_ms_shipped = 0 )
    AND 
    ( P.index_id IN (1,0) )
    And
    ( T.type = 'U' )

Group By S.name , T.name 

Order By SUM( P.rows ) Desc

Answer 5

为什么不右键单击表，然后单击属性-> 存储，它会告诉您行数。您可以在视图中使用下面的行数

SELECT SUM (row_count) 
FROM sys.dm_db_partition_stats 
WHERE object_id=OBJECT_ID('Transactions')    
AND (index_id=0 or index_id=1)`