Tagged Questions

1
vote
0answers
34 views

Record versioning and promotion

Let's say we have this hierarchy: -World --USA ---WA ----Seattle -----Downtown ------1st Ave -------945 1st ave ------3rd Ave ...
4
votes
1answer
202 views

Best way to index a table with two datetime columns that are equally queried

Sql Server 2008 R2. I have a table with ~70m records, about 10 inserts per second. It's currently clustered on a CreatedAt datetime column, which always increases. 50% of queries involve this ...
3
votes
1answer
170 views

Applying user-defined fields to arbitrary entities

Currently we have an old (rather crude) system that has user-defined fields, which are mapped against rows in arbitrary tables. This was an after-the-fact modification based on a customer request, and ...
1
vote
1answer
63 views

Issues on defining a PK on a nvarchar column and indexing the FK referring this PK

Someone from the team, has defined two reference tables with a few records in each, and has defined the PK of these tables on a column of type nvarchar(255). The value exists in this columns are ...
4
votes
1answer
114 views

MI Data Warehouse Advice

I have recently started a new job and part of my remit is to try to rescue the Management Information (MI) Data Warehouse. I use the term Data Warehouse very loosely here! The server setup is: ...
3
votes
2answers
2k views

Efficient way of changing VARCHAR to NVARCHAR fields in a large table in SQL Server 2008?

I am aware of when adding new fields to large tables, it is recommended to add them to the end of the fields rather than somewhere in the middle, and wondering if something like this applies when ...
1
vote
1answer
132 views

Choosing the right field data type in SQL Server 2008

I got a request to create a new table that will store certain information for customers. The definition of the table is somewhat irrelevant except for one field. This field will store ANSI characters ...
1
vote
2answers
454 views

Adding Row Version to SQL Server table

I have a table in a database with three columns: ID, Key and Value. Everytime I update the record, I have a trigger that sends these updates to another table and creates a new record in it, who's ...
1
vote
1answer
275 views

DATETIME2 and IDENTITY as composite key

I am currently developing a new database schema with an opportunity to do things right. The purpose of the development effort is to collect data (events) from various sensors that will be recorded ...
6
votes
4answers
4k views

SQL Server database on an SSD - any advantage to a separate file for every table?

I'm creating a database in which there will be around 30 tables, with every table containing tens of millions of rows and each table containing a single important column and a primary/foreign key ...
6
votes
3answers
228 views

Would it be considered as a bad practice to have multiple nullable FKs on a table in SQL Server

On my database structure in SQL Server, I have 3 types of products which requires different information about the order. So, I created one Customers table and three different orders tables: ...
1
vote
1answer
62 views

Reading and writing the common data

I have a couple tables and application service that intensively inserts, updates its. From the other hand some client application have to read data using those tables. Sometimes client application ...