What is an Identity?
Identity (or AutoNumber) is a column that automatically generates numeric values. A start and increment value can be set, but...
2016-01-26
124 reads
TSQL Circle Live
What is Normalization in SQL Server?
In relational database design, the process of organizing data to minimize redundancy is called normalization. It usually involves dividing a...
2016-01-26
197 reads
What is an execution plan? When would you use it? How would you view the execution plan?
An execution plan is basically a road map that graphically or textually shows the data retrieval methods chosen by the...
2015-12-28
848 reads
How do we insert the results of the stored procedure in a table?
This question has two crinkle answers –· When the table is already created.
· When the table is to be created run...
2015-11-13
134 reads
How we can convert Comma Separated Value to Rows and Vice Versa?
How we can convert Comma Separated Value to Rows and Vice Versa?
Basic fundamental
While we are working on reporting some circumstances...
2015-10-08
443 reads
HOW WE CAN GET WHO IS CONNECTED TO DATABASE?
Some time we need to know that who is using database as of now or who all are connected to...
2015-10-07
556 reads
Table valued parameters (TVP)
Table values parameters
How we can pass multiple rows in stored procedure or function as a parameter?
Table-valued parameters are a new...
2015-10-06
1,976 reads
Utility link for excel import to SQL
Utility link for excel import to SQL
Save Excel Data into Databases
http://www.savetodb.com/Connect to databases, edit data, and save changes back. Edit data...
2015-09-30
440 reads
Blogs
What is KTLO? Keep The Lights On vs Project Work in Agile
By Rohit Garg
🔍 Demystifying KTLO: A Deep Dive into Keep The Lights On Work in IT...
The PASS Summit on Tour in Dallas
By Steve Jones
The PASS Summit goes on tour this year, with a September stop in Dallas....
SQL Server Auto-settings: The Good, the Bad, and the Ugly
By Kevin3NF
Settings That Could Be Hurting Your Performance If you’ve ever created a new SQL...
Forums
How a Legacy Logic Choked SQL Server in a 30-Year-Old Factory
Comments posted to this topic are about the item How a Legacy Logic Choked...
Formatting Dates and Times: The SQL Dialect Divide
Comments posted to this topic are about the item Formatting Dates and Times: The...
Query Plan Regressions --
Comments posted to this topic are about the item Query Plan Regressions --
Question of the Day
Query Plan Regressions --
For the Question of the day, I am going to go deep, but try to be more clear, as I feel like I didn't give enough info last time, leading folks to guess the wrong answer... :) For today's question: You’re troubleshooting a performance issue on a critical stored procedure. You notice that a previously efficient query now performs a full table scan instead of an index seek. Upon investigating, you find that an NVARCHAR parameter is being compared to a VARCHAR column in the WHERE clause. What is the most likely cause of the query plan regression?
See possible answers