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 ...

The most important performance-tuning technique available is having the needed indexes created on the tables to ensure that the SQL Server database engine is able to get the data that it needs to as ...

PL/SQL stands for Procedural Language extension of SQL. PL/SQL is a combination of SQL along with the procedural features of programming languages. It was developed by Oracle Corporation in the early ...

The indexes on a the tables of a large database make a huge difference in its performance and utility. Without an index, locating a single record in a large table can take several seconds; with the ...

There's two answers to this question, the short answer and the long answer (which includes a follow-up question). The short answer is yes For the longer answer, let's start with the follow-up question ...