Structured Query Language (SQL) is a standard for communicating with a database that is maintained by ANSI. The latest version is SQL-99, though a new standard is in the works (SQL-200n).

SQL Basics I: Data Queries —covers database terminology and the four basic query types. SQL Basics: SELECT statement options —covers the SELECT statement in detail and explains aggregate ...

Assuring optimal performance of database applications starts with coding properly formulated SQL. Poorly written SQL and application code is the cause of most performance problems. As much as 75% of ...

Spark SQL: Apache’s Spark project is for real-time, in-memory, parallelized processing of Hadoop data. Spark SQL builds on top of it to allow SQL queries to be written against data.

This is the dreaded "SQL Injection Attack" you keep hearing about on the nightly news. Beyond these data issues, the query as defined brings with it some performance issues, especially at the database ...