0
votes
1answer
32 views

Take query results and insert into new table

So I have the following query: DECLARE @tbl TABLE(value int) *--The same function but with the number of the random numbers ;WITH Nbrs (n) AS ( SELECT 1 UNION ALL SELECT 1 + n FROM ...
2
votes
1answer
27 views

Update only the oldest entry in a table with foreign key criteria

I'm working on a forum website. What I am trying to do is updating the thread Title and Content (first post), which resides in different tables - "Threads" and "Posts". "Threads" "Posts" I'm ...
11
votes
1answer
223 views

Why does subquery use parallelism and join doesn't?

Why does SQL server use parallelism when running this query which uses a subquery but it doesn't when using a join? The join version runs in serial and takes around 30 times longer to complete. Join ...
2
votes
1answer
1k views

SQL Server select with regex

Can we use regular expression to select the item from database? The table item is like below Table column|name| 10.01.02 | a | 100.2.03 | b | 1021.10.04 | c | Now my problem is that i ...
2
votes
2answers
409 views

Why do I need to use a sub query to filter down a grouped select?

If I do this -- SELECT dv.Name ,MAX(hb.[DateEntered]) as DE FROM [Devices] as dv INNER JOIN [Heartbeats] as hb ON hb.DeviceID = dv.ID WHERE DE < '2013-03-04' GROUP BY dv.Name ...
0
votes
0answers
41 views

Consolidate does not work with my subquery [duplicate]

Possible Duplicate: SQL Subquery , One to Multiple rows Following query I have written returns the result as expected, example 121350 rows. SELECT ...
-3
votes
2answers
493 views

Optimisation sub query SQL Server

I would like to optimise the query below because it's actually taking 40% of the time in the real one. I HAVE to get the first line in the table 2 for each line in the table 1. The relationship is 1 ...
0
votes
2answers
129 views

Are these two queries technically equal to each other?

Ran it in my query browser. I was am getting same results for both. But still need a confirmation. SELECT cs.RSCode , CustomerName , em.EmailId FROM Customer_STN cs JOIN ...
1
vote
1answer
162 views

Querying multiple tables

I am working on a query from our ticketing system, and I am having problems figuring out the best way to join these tables together. I have the following tables/fields: SR_service: stores ticket ...
7
votes
2answers
2k views

Subqueries' aliases same as main queries' aliases

I have an SQL query whose aliases are the same as some of its subquery's aliases. For example: select * from ROOM r where ... ( select * from ROAD r ...
1
vote
0answers
406 views

time interval period in sql [closed]

How to display the time period of the most widely in use in ms sql server I have purchase data, such as: hours the number of purchases 10:00 2 12:00 4 13:00 5 14:00 1 ...