The structured query language is a powerful tool for connecting to many database systems that store data in tables organized into rows and columns. It's often used on the backend of business websites ...

When working as an engineer, you will surprisingly often have opportunities to interact with databases. From application ...

A practical guide to how databases work, covering schema design, SQL, indexing, transactions, concurrency, caching, pagination, and database selection.

"Find the best-selling product from last year." When an AI system attempts to answer a question like this by querying a company database, even a single reference to a nonexistent item can cause the ...

A common SQL habit is to use SELECT * on a query, because it’s tedious to list all the columns you need. Plus, sometimes those columns may change over time, so why not just do things the easy way? But ...

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 ...

I am trying to join two databases in an SQL query. Database A has a table with a 5 digit client number and another table with a 5 digit matter number. The other database, B, has a table with one field ...

From performance to programmability, the right database makes all the difference. Here are 13 key questions to guide your selection. Picking the “right” database can often be critical to the success ...

In-memory database management systems (DBMSes) are growing in popularity and there are many different options from which to choose. The basic defining characteristic of an in-memory DBMS is that it's ...

What is an RDBMS (relational database management system)? A relational database management system (RDBMS) is a collection of programs and capabilities that enable IT teams and others to create, update ...