Convert UNIX Timestamps to DATE/TIMEs in SQL Server - Part#1
In Unix, a timestamp is a whole number that represents a date and time. Learn how we can convert those correctly in SQL Server.
2022-11-15 (first published: 2022-09-14)
6,107 reads
Jeff Moden
- Interests: SQL. When Im not having fun with that, then SQL. ;-)
The "Numbers" or "Tally" Table: What it is and how it replaces a loop
Many people have used a "Numbers" or "Tally" table without really knowing what it does. This is an introduction as to how a Tally table replaces a loop.
2022-09-05 (first published: 2008-05-07)
144,813 reads
How to Format Dates in SQL Server (Hint: Don’t Use FORMAT!)
Here's why you should NEVER use the FORMAT() function in SQL Server.
2022-08-05
17,006 reads
How to Find the Start and End Dates for the Current Week (and more)
Learn to calculate Start / First of Week, End of Week, Start of Next Week, Year, Quarter, and Month of the week, Week Numbers and more in T-SQL (Jeff Moden)
2022-07-13
8,756 reads
Cross Tabs and Pivots, Part 1 – Converting Rows to Columns
An "old" subject is revisted where "newbies" can learn the methods and veteran users can get more performance out of the code.
2021-11-23 (first published: 2008-08-19)
119,776 reads
How much will it cost or save to rebuild that index? (SQL Oolie)
What's the true and permanent cost of lowering the Fill Factor of an index in SQL Server? It's a lot more than many people think. 9 year SQL Server MVP veteran, Jeff Moden, demonstrates how to calculate the extra space that will be used by lowering the Fill Factor and saved by increasing it.
2021-05-28 (first published: 2019-09-03)
9,377 reads
Create a Tally Function (fnTally)
Many people have published high performance, read-less, Inline Table Valued functions that use Itzik Ben-Gan's wonderful "Virtual Numbers Table" to replace WHILE loops and other forms of RBAR. This one is Jeff Moden's version.
2019-08-13 (first published: 2019-08-04)
4,889 reads
Some T-SQL INSERTs DO Follow the Fill Factor! (SQL Oolie)
With origins from the world of “Submarine ‘Dolphin’ Qualification” questions, an “Oolie” is a difficult question to answer, or the knowledge or fact needed to answer such a question, that may or may not pertain to one's duties but tests one's knowledge of a system or process to the limit. Introduction Contrary to what many […]
2019-08-08
5,838 reads
Solving the Running Total and Ordinal Rank Problems (Rewritten)
Revisiting his very popular article on the running total and ordinal rank problems, MVP Jeff Moden brings us a detailed analysis of how you might want to implement a solution in T-SQL.
2019-05-22 (first published: 2009-11-10)
44,866 reads
Hidden Formatting Troubles with STR() (SQL Spackle)
Fill in another bit of your T-SQL knowledge about STR(). It right justifies, rounds, and controls the output width of columns. Sounds perfect but here's why you might not want to use it.
2019-04-26 (first published: 2010-12-15)
15,889 reads
Blogs
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Review Early and Often
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