GitHub

sql-basics.rst

Basics Part 1 of this book is all about SQL, the most popular language used for interacting with relational databases, the main focus of the book. The goal of this chapter is to introduce the most ...
GitHub

sql basics assignment basic.sql

: emp_id (integer, should not be NULL and should be a primary key)Q : emp_name (text, should not be NULL)Q : age (integer, should have a check constraint to ensure the age is at least 18)Q : email ...
ZDNet

SQL basics I: Data queries

Whether you’re just getting in to programming or you’ve avoided learning SQL, it’s something every developer faces eventually. You may not be responsible for building and maintaining a database, but ...
TechRepublic

SQL basics: SELECT statement options

Learn how to master the SELECT statement to form truly useful data queries. This article explains functions, clauses, and keywords that will make your life a lot easier. Due to popular demand, we’re ...
dbta

SQL Performance Basics

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 ...
TechRepublic

SQL basics: Datetime and interval data types

Shelley Doll finishes her coverage of SQL data types with an overview of datetime and interval data types. Learn more about the basic syntax of these standard SQL types. Datetimes and intervals are ...