When Sys.parttition,sys.indexes gets Updated

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When Sys.parttition,sys.indexes gets Updated

Author

Topic

pradeep_iete
Yak Posting Veteran

84 Posts

Posted - 2010-01-15 : 07:14:10

Hi All,

Guys Can u all tell me when difference between following queries exist then how to update it in system.catalogues

Query1)

SELECT count(*) FROM <table>
Query2)

SELECT rowcnt FROM sys.indexes WHERE Object_ID=OBJECT_ID(<TABLE>)
OR
SELECT * FROM sys.partitions WHERE Object_ID=OBJECT_ID(<TABLE>)

I have found difference between the two queries all the time ?WHY it is SO?
How we can update the deficit therefore ?

AndrewMurphy
Master Smack Fu Yak Hacker

2916 Posts

Posted - 2010-01-15 : 08:07:57

count * counts every record (subject to the where clause)
count somecol only counts records with somecol notnull (ditto)

GilaMonster
Master Smack Fu Yak Hacker

4507 Posts

Posted - 2010-01-15 : 10:15:13

DBCC UpdateUsage

Shouldn't be needed on SQL 2005, but if this DB was upgraded from SQL 2000, there could still be discrepancies.

--
Gail Shaw
SQL Server MVP

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