Scripts

Technical Article

Extract parts of the strings from the SQL results directly by using SQL's substring-extraction API functions

If you need to extract a substring or create a longer string by combining multiple strings, there are a few methods you can use. To extract a specific portion of a string, you can utilize a substring-extraction function.

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2023-05-09 (first published: )

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Technical Article

Python 3 Script for Generating SQL Insert Statements from CSV Data

This Python 3 script is designed to take CSV file data pasted into the csv_data variable and generate SQL insert statements that can be used to insert the data into a MySQL database. The script is easy to use and can save you a lot of time when working with large amounts of data.

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2023-05-08 (first published: )

5,676 reads

Technical Article

Converting To/From User Friendly Trigesimal Geocodes

The Problem As a data professional, I have often wished that there was a short, simple, and universal code to enable finding a place on earth. Addresses are nice but require a government authority to build a road, name it, and number its locations, and standardize its entry / use, and then they are far […]

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2023-03-30 (first published: )

206 reads

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Question of the Day

The Read Committed Snapshot Isolation behaviour

I am currently working with Sql Server 2022 and AdventureWorks database. First of all, let's set the "Read Committed Snapshot" to ON:

use master;
go

alter database AdventureWorks set read_committed_snapshot on with no_wait;
go
Then, from Session 1, I execute the following code:
--Session 1
use AdventureWorks;
go

create table ##t1 (id int, f1 varchar(10));
go

insert into ##t1 values (1, 'A');
From another session, called Session 2, I open a transaction and execute the following update:
--Session 2
use AdventureWorks;
go

begin tran;
update ##t1 
set f1 = 'B'
where id = 1;
Now, going back to Session 1, what happens if I execute this statement?
--Session 1
select f1
from ##t1
where id = 1;
 

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