2024-11-25
184 reads
math
Banker’s Rounding. What is it good for?
An in depth look at the implications of using Banker's Rounding.
2020-06-15
18,714 reads
Optimize Your SQL by Reformulating the Spec
As SQL developers, we tend to think of performance tuning in terms of crafting the best table indices, avoiding scalar and table valued functions, and analyzing query plans (among other things). But sometimes going back to the spec and applying some properties of elementary math can be the best way to begin to improve performance of SQL queries which implement mathematical formulas. This article is a case study of how I used this technique to optimize my SQL implementation of the Inverse Simpson Index.
2021-05-07 (first published: 2019-09-12)
5,403 reads
SQL for 8-year-old Math…But Be Careful of Implicit Type Conversion
How we can use SQL to solve a math problem published in The Guardian...but with a caution about implicit type conversion.
2015-07-14
7,532 reads
Integer left and right shift
3 functions that implement the left (<<), right (>>) and unsigned right (>>>) shift operators, commonly found in C-style languages.
2012-02-15 (first published: 2011-12-30)
8,123 reads
Blogs
From SQL Saturday to Day of Data
By ReviewMyDB
A behind-the-scenes look at Day of Data Jacksonville 2026, the transition from SQL Saturday,...
PostgreSQL 18 Finally Makes BUFFERS the Default. Here Is Why That Matters
You run EXPLAIN ANALYZE on a slow query, stare at the plan, and something...
A New Word: La Guadière
By Steve Jones
la guadière – n. a glint of goodness you notice in something that you...
Forums
non ascii columns in a utf-8 .txt file
hi, we couldnt get our upstream data source developers to supply what is sometimes...
PolyBase Trace Flags
Are there any good articles on all the trace flags that are enabled on...
The Data Model Matters
Comments posted to this topic are about the item The Data Model Matters
Question of the Day
Running SQLCMD I
I run the SQLCMD utility as follows:
lcmd -S localhost -EI then type this (the 1> is the prompt):
1> select @@version goIf I hit enter, what happens? See possible answers