Самый быстрый способ узнать количество записей в таблице

When using the standard dataset.recordcount in my client-server (win nt against sqlserver7 db, targettable has 500.000 records) i can go for lunch and stil be waiting (:-
For those of you who don't know why u should not use the standard dataset.recordcount when developing client server database applications.
This article is especialy for those cs db apps against a sqlserver 7 db.
since the standard dataset.recordcount iterates from begin of the table through the end of the table to result in the recordcount. This is a crime when developing cs db apps (against sqlserver7).
simply use another way of obtaining the number of records. I use a sql for obtaining the number of records in a sqlserver table.
drop a tquery on the form
provide this tquery with the follow SQL:

select distinct max(itbl.rows)

from sysindexes as itbl

inner join sysobjects as otbl on (itbl.id = otbl.id)

where (otbl.type = 'U') and (otbl.name = :parTableName)

notice the parameter: parTableName type string
use this tquery to find out how many rows in the table
TIP: try to make your own tYourSqlServerCountQuery and thus override the recordcount property.
ByTheWay: use this only for sqlserver
for other cs db apps simply use a count sql (coming upnext time...)
Взято с Delphi Knowledge Base: http://www.baltsoft.com/

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