Differences between Subqueries and CTEs (WITH clauses)

For those new to data analysis, I will explain the differences and proper usage of the two tools for organizing complex ...
Ars Technica

Correlated Subquery MUCH slower than same query using temp tables: Not enough RAM?

I wrote a query (with lots of help, see my painfully plentiful other threads) using a correlated subquery and it takes 5.78 seconds PER RECORD to return results. The SAME query, only I select the ...
Ars Technica

MS Access - Simple update query from a count() subquery - possible?

I have what i think to be a relatively simple task and may just be having a "moment" I'm building a report and am pulling a bunch of data from our db. The table I'm builidng has 5 fields. I populate ...
techtarget

T-SQL (Transact-SQL)

T-SQL (Transact-SQL) is a set of programming extensions from Sybase and Microsoft that add several features to the Structured Query Language (SQL), including ...
InfoWorld

SQL unleashed: 7 SQL mistakes to avoidPostgreSQL

SQL is a convenient way to manage and query your data, but badly written queries can tie up your database. Here are seven common SQL traps and how to avoid them. Database developers have it tough.
techtarget

What is Structured Query Language (SQL)?

Structured Query Language (SQL) is a standardized programming language that is used to manage relational databases and perform various operations on the data in them. Initially created in the 1970s, ...