Introduction According to the official documentation, the READ COMMITTED isolation level “specifies that statements cannot read data that has been modified but not committed by other transactions”. So, one could think that a record returned under this isolation level existed in the committed state at the time of reading. In this article, I am going […]
2021-10-01
2,112 reads
A detailed description of a technique for the the solution of the Bin Packing Problem, that involves a recursive CTE and Window functions
2020-05-14 (first published: 2020-04-23)
5,491 reads
Introduction TOP is one of the many syntactical operators available in T-SQL and at a first view, it could seem very simple and not particularly interesting. According to the official documentation, it “limits the rows returned in a query result set to a specified number of rows or percentage of rows”. The following is the […]
2019-06-04
5,110 reads
Based on a real fact, this article demonstrates how a bad use of sp_executesql can lead to unpleasant surprises
2018-04-30
1,782 reads
Foreign Keys are one of the fundamental characteristics of relational databases and enforce the referential integrity. Is it a good idea to index a FK relationship? When can it help?
2016-09-16 (first published: 2015-06-29)
15,614 reads
SQL Server 2014 has introduced a rebuilt Cardinality Estimator (CE) with new algorithms. Which are the biggest differences between the new CE and the previous one? Which one works better? Read more to find out.
2015-04-09
6,763 reads
This month, I prompted bloggers to discuss whether good enough is perfect. Thank you to all...
By Steve Jones
Recently a customer asked if SQL Compare and SQL Data Compare can be used...
i see this in the definition of a linked server on our wh sql...
Is this even possible ? Tried with grant but to no avail. [sys].[database_role_members] and...
Comments posted to this topic are about the item Stairway to Snowflake Level 5...
What does this code return in SSMS 20 from SQL Server 2019?
select '|' + CHAR(0)+'abc' + '|';See possible answers