Question

Sorry for any incorrect terms as I am not proficient in SQL…

I have a query that I need to run daily, however the table that I need to query includes todays date. Normally I run:

SELECT m.displayName, a.source, count(a.agentGuid)
FROM ntEventLog20120725 AS a
LEFT OUTER JOIN machNameTab AS m ON a.agentGuid = m.agentGuid
WHERE a.eventTime > DATEADD(hour, -1, CURRENT_TIMESTAMP)
GROUP BY a.agentGuid, m.displayName, a.source
HAVING COUNT(a.agentGuid) > 1000
ORDER BY m.displayName

However the table I want to query each day is different. Todays table is ntEventLog20120725, tomorrows will be ntEventLog20120726. I know how to get the date in that format:

SELECT CONVERT(varchar, getDate(), 112)

I just do not know how to combine the two together so that I can schedule this to run everyday.

Answer 1

you can do this using dynamic query. though using dynamic query is not a good practice. But I guess that is the only option here

declare @date_val char(8)
select @date_val=convert(varchar,getDate(),112)

exec('
SELECT m.displayName,a.source,count(a.agentGuid) from ntEventLog'+@date_val+' a LEFT OUTER JOIN machNameTab m ON a.agentGuid = m.agentGuid WHERE a.eventTime > DATEADD(hour, -1, CURRENT_TIMESTAMP)
GROUP BY a.agentGuid, m.displayName,a.source
HAVING COUNT(a.agentGuid) > 1000
ORDER BY m.displayName')

As triclosan mentioned in the comment, you should consider redesigning the table. Not a good practice to have tables for each day