2017-11-28
1,136 reads
T-SQL
2017-11-23
980 reads
2017-11-10
1,192 reads
2017-11-07
1,051 reads
2017-10-23
1,128 reads
Simple SQL: Random Thoughts
How does one get a truly random sample of data of a certain size from a SQL Server database table. Well, there are simple non-portable tricks one can use, such as the NewID() function, but then refining those can be tricky. Take the Rand() function for a start. Can it really provide you with a truly random number? Why doesn't the TABLESAMPLE clause give you a set number of rows? Joe Celko scratches his head a bit, explains some of the issues and invites some suggestions and tricks from readers.
2017-10-19
3,623 reads
2017-10-06
1,111 reads
The Basics of Good T-SQL Coding Style – Part 4: Performance
There are several obvious problems with poor SQL Coding habits. It can make code difficult to maintain, or can confuse your team colleagues. It can make refactoring a chore or make testing difficult. The most serious problem is poor performance. You can write SQL that looks beautiful but performs sluggishly, or interferes with other threads. A busy database developer adopts good habits so as to avoid staring at execution plans. Rob Sheldon gives some examples.
2017-10-05
6,056 reads
2017-09-29
1,046 reads
2017-09-26
1,193 reads
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Forums
Unraveling the Mysteries of the Ephemeral Model: The Fabric Modern Data Platform
Comments posted to this topic are about the item Unraveling the Mysteries of the...
QUOTENAME Behavior
Comments posted to this topic are about the item QUOTENAME Behavior
Running script without having permission to Function
Good Morning. I have a T-SQL Script which has been developed to execute a...
Question of the Day
QUOTENAME Behavior
I use QUOTENAME() like this in code?
DECLARE @s VARCHAR(20) = 'Steve Jones' SELECT QUOTENAME(@s, '>')What is returned? See possible answers