2009-04-01
5,200 reads
2009-04-01
5,200 reads
Too many authors in the field of relational theory have neglected the concept of Cardinal Reciprocity. This can cause a number of subtle problems with database design in terms of its derivability, redundancy, and consistency. . Increasingly, this little-understood aspect of relational theory, that emphasises the cardinality of the attributes of tuples in a relation and the reciprocity with isomorphic foreign key restraints, is becoming a hot forum topic.
2009-04-01
2,846 reads
2008-12-25
4,629 reads
2008-12-25
3,345 reads
2008-12-24
183 reads
2008-12-24
179 reads
2008-12-24
428 reads
2008-10-31
4,728 reads
A while back, in a Simple-Talk editorial meeting, someone bet Phil that he couldn't come up with a Halloween story. To our surprise he said he could, as long as he didn't have to keep to the strict literal truth.
2008-10-31
3,002 reads
2008-07-11
4,913 reads
By gbargsley
In SQL Server environments where transactional replication runs alongside Always On Availability Groups (AGs),...
Disable the sa login in SQL Server (and sleep better)If you run SQL Server...
By Chris Yates
Change is inevitable. What separates thriving organizations from those that falter is not the...
Comments posted to this topic are about the item Create an HTML Report on...
Comments posted to this topic are about the item Be Wary of Data
Comments posted to this topic are about the item Locking Hierarchies
You have a table [dbo].[orders] without a Clustered Index (Heap). The table does not have any other nonclustered indexes! You rund the following command in Read Committed Isolation Level:
SELECTo_orderdate, o_orderkey, o_custkey, o_storekey FROMdbo.orders WHEREo_orderkey = 3877;