Data Warehousing

Technical Article

Data is at the Heart of Enterprise-Wide BI and DW, Part 3

  • Article

My online series of articles has been focused on the need for businesses to "get serious" about their approach to developing an enterprise business intelligence (BI) and data warehousing (DW) capability. When pursuing this capability it is important to adopt a holistic view, followed by disciplined investment and execution.

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2007-10-26

2,267 reads

Technical Article

UDF: Estimating the size of a table

  • Script

In database planning and design it is essential to plan out how much HD space you are going to need to store your data. If you use BOL and do a search for "Estimating Table Size" you get three articles: - Estimating the size of a table - Estimating the size of a table with […]

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2006-06-21 (first published: )

533 reads

Technical Article

Pagination in stored procedure

  • Script

You recently published a script showing how to do pagination (e.g. results 20 - 30 of 100) It's also possible to do it quicker and more elegantly without having to resort to building the sql string dynamically (never a good thing IMHO). You pass in 2 parameters, @PageIndex is the first record you want (so […]

(2)

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2006-05-31 (first published: )

1,303 reads

Technical Article

Generate Add Foreign Keys statements for the table

  • Script

I was going through the painfull optimization of the database of creating better clustered indexes (not the default ones on the primary key).This operation was requiring removing all foreign keys to this table and then recreation them again.I created this script to optimize this quite tidious task.

(1)

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2006-06-08 (first published: )

760 reads

Technical Article

Source system pre-integration analysis

  • Script

Initial analysis of a new source system can be quite time consuming to manually examine tables and columns to determine which even have worthwhile values in the first place. Running this script against the current database will generate useful information for all the columns of all the tables. Details include data types with varchar lengths, […]

(1)

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2005-06-07

463 reads

Technical Article

Handle Divide by Zero in SQL Reporting Services

  • Script

Out of the box, Reporting services does not handle divide by zero conditions gracefully. There are plenty of posting on how to use the IIF() function to accomplish this, with some rather horrific looking code. In order to simplify the coding process and make the resulting expressions readable by a mere mortal, I wrote the […]

(14)

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2006-07-28 (first published: )

4,026 reads

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Question of the Day

ORDER BY alias

There is a table tmp_tab:

CREATE TABLE tmp_tab (
id int,
val int
);
INSERT INTO tmp_tab VALUES
(1, 1),
(2, NULL),
(3, 3),
(4, 4),
(5, 5);
You want to order the rows ids by the following expression:
    ISNULL(val, id) + 1
Which of the following queries produces the expected ordering and why? (Select all correct)

See possible answers