Read this SQL tutorial to learn when to use SELECT, JOIN, subselects and UNION to access multiple tables with a single statement. It’s sometimes difficult to know which SQL syntax to use when ...

A WPF ListBox lets you display data created and stored in a SQL table. You must query the SQL database, and you use the retrieved data set to populate the ListBox items. The SQL table can contain one ...

I have the following SQL in a VB script to create a new table in a Microsoft Access 2010 Database: CREATE TABLE ElectionFile( Record_Type CHAR(50) WITH COMPRESSION NULL, Employer_ID CHAR(50) WITH ...

Follow this step-by-step guide to install PostgreSQL, load data, connect to a database, and execute SQL queries including table joins PostgreSQL is an open-source, object-relational (also called ...

Designing an appropriate set of indexes can be one of the more troubling aspects of developing efficient relational database applications. Perhaps, the most important thing you can do to assure ...

Thanks to the technology behind ChatGPT, it’s become surprisingly simple to query a data set in plain English. As with most generative AI, results from OpenAI’s API are still imperfect, which means ...

How to create and populate a table in Microsoft Excel’s Power Query Your email has been sent Updating data in a Microsoft Excel workbook is common, but you will run into cases where you can replace ...

Immortalized by “Little Bobby Drop Tables” in XKCD 327, SQL injection (SQLi) was first discovered in 1998, yet continues to plague web applications across the internet. Even the OWASP Top Ten lists ...

PolyBase, a data virtualization feature for SQL Server, allows users to seamlessly query data from various external sources directly using T-SQL (Transact-SQL) without the need for separate client ...

SQL is about as easy as it gets in the world of programming, and yet its learning curve is still steep enough to prevent many people from interacting with relational databases. Salesforce’s AI ...