In this article, we are going to see how we can limit the SQL query result set to the Top-N rows only. Limiting the SQL result set is very important when the underlying query could end up fetching a very large number of records, which can have asignificant impact on application performa...
'Camera' AS product, 82 AS cost UNION ALL SELECT 3 AS id, 'Cup' AS product, 103 AS cost ) select 'id' as field, array(select distinct cast(id as string) from tbl limit 2) as values union all select 'product', array(select distinct cast(product as string) from tbl ...
SET NOCOUNT ON; DECLARE @SET_SIZE INT = 500000000; CREATE TABLE dbo.Test500Million (N INT PRIMARY KEY CLUSTERED NOT NULL); ;WITH T(N) AS (SELECT N FROM (VALUES (NULL),(NULL),(NULL),(NULL),(NULL),(NULL),(NULL),(NULL),(NULL),(NULL)) AS X(N)) ,NUMS(N) AS (SELE...
ToDateTime same in VB.NET? Argument 'Length' must be greater or equal to zero. Array of labels Arrays - Finding Highest and Lowest Values in an array asenumerable is not a member of system.data.datatable Asign an array to a Combobox.Items --VB.NET Assign 'Enter' key to a button?
I'm trying to port some old MySQL queries to PostgreSQL, but I'm having trouble with this one: DELETE FROM logtable ORDER BY timestamp LIMIT 10; PostgreSQL doesn't allow ordering or limits in its delete syntax, and the table doesn't have a primary key so I can't use...
How to: Configure Packet Size (SQL Server Management Studio) How to: Configure the query governor cost limit Option (SQL Server Management Studio) How to: Configure the query wait Option (SQL Server Management Studio) How to: Enable the Lock Pages in Memory Option (Windows) How to: Map TCP...
The solution for this requirement is to use aLogon Triggers. Using Logon trigger we will be able to limit the connections to SQL Server unless all databases are ONLINE, but what if this is a SQL Server cluster? Well, there is a solution for this also! However, t...
The only required argument is the number of rows to display. In our example,LIMIT 3produced a result set containing three rows. Unless you specify otherwise with theOFFSETargument, this function will always return the firstnrows that meet query requirements. ...
The data from each conflicting row is stored in aSyncConflictcollection. This collection could grow large enough to cause an out-of-memory error in the following situations: There are a large number of conflicting rows. Consider synchronizing a smaller number of rows in each session, or limit ...
To learn how to write an SQL query, let's use the following question: Who are the people with red hair in Massachusetts who were born in 2003? Using the SELECT command SELECT chooses the fields that you want displayed in your chart. This is the specific piece of information that you wan...