Count distinct in Access with a subquery in the FROM clause, because Access SQL does not accept COUNT(DISTINCT). Includes NULL and multi-column cases.
SQL SERVER – Identity Column is Difficult to Remove
The IDENTITY property is difficult to remove through a column alteration because SQL Server doesn’t support that operation. Existing values need protection.
Index Scans – Good or Bad? – SQL in Sixty Seconds #174
Index Scans – Good or Bad? Lots of people ask about this question and I have built a blog post on the topic – SQL SERVER – Index Scans are Not Always Bad.
SQL SERVER – Index Scans are Not Always Bad
Are Index Scans Bad? The answer No. Index Scans are Not Always Bad. This was in-depth discussed with my client during the Health Check.
Optimize for Ad Hoc Workloads – SQL in Sixty Seconds #173
Today we are going to discuss if we should keep Optimize for Ad Hoc Workloads true or false. Let us see a detailed video about it.
Avoid Join Hints – SQL in Sixty Seconds #172
Question: If they can change the join hints to improve the performance of the query. Well, the reality is that I always Avoid Join Hints.
One Query Many Plans – SQL in Sixty Seconds #171
After the blog post, lots of people asked me it will be more helpful if I can create a video on the same topic of one query many plans.