SQL WHERE Clause: Guide and Examples
In this article, you’ll learn what the WHERE clause is in SQL, how to use it, and see some examples.
SQL CTE (WITH Clause): The Ultimate Guide
A Common Table Expression (or CTE) is a feature in several SQL versions to improve the maintainability and readability of an SQL query.
It goes by a few names:
- Common Table Expression
- Subquery Factoring
- SQL WITH Clause
In this article, you’ll learn all about the Common Table Expression, what it’s good for, and how to use it.
132 Computer Science Faculty Share Their Advice for New CS Students
Starting a Computer Science course can be daunting to new students.
There are a lot of new concepts to learn. A new environment to settle in to. And depending on your college, there can be a lot of services offered to students.
I contacted 132 different Computer Science professors and lecturers and asked them for an answer to one question:
If you could offer one piece of advice to new Computer Science students, what would it be?
Let me tell you, the insights I received from these professors and lecturers were nothing short of amazing. I’ve listed all of them below.
I’ve also extracted the most common pieces of advice into a summary for you.
How to Create a Connection and Set Up Data for the Introduction to Oracle SQL Course
This post will show you how to set up the sample user and sample data for my Introduction to Oracle SQL course.
read more…
PL/SQL Tutorial: Chapter 7
PL/SQL Tutorial Chapter 7: Nested Blocks and Packages
In this section, you’ll learn:
- What nested blocks are and how to create them
- What packages are, why you should use them, and how to create them
PL/SQL Tutorial: Chapter 6
PL/SQL Tutorial Chapter 6: Record Types and Bulk Collect
In this chapter, we’ll learn about:
- Using data types based on tables and columns
- Understanding what collections are
- Using the BULK COLLECT keyword to fetch data in bulk
These are all great features of the PL/SQL language and will take your code to the next level.
PL/SQL Tutorial: Chapter 5
PL/SQL Tutorial Chapter 5: Cursors, Arrays, and Bulk Collect
In this chapter, we’ll learn about some pretty useful concepts in PL/SQL:
- What a cursor is
- The two types of cursors
- Inserting, updating, and deleting data in tables using PL/SQL
- Selecting data from a table into PL/SQL
- What an array is and how to use one
PL/SQL Tutorial: Chapter 4
PL/SQL Chapter 4: Procedures, Functions, and Exceptions
In this chapter, you’ll learn:
- What procedures and functions are
- How to create a procedure
- How to create a function
- What an exception is and how to handle one
Let’s get started!
PL/SQL Tutorial: Chapter 3
PL/SQL Tutorial Chapter 3: Conditions and Loops
In this chapter, you’ll learn about:
- Conditions (If, Then, Else)
- Loops
- Commenting Code
These are common features of other programming languages, and PL/SQL lets you use these features as well.
PL/SQL Tutorial: Chapter 1
PL/SQL Tutorial Chapter 1: Introduction and Your First PL/SQL Program
In this chapter, you’ll learn:
- What PL/SQL is and what it stands for
- The basic structure and syntax of a PL/SQL program
- Write and run your first PL/SQL program
Let’s get right into it!
Ben Brumm
DatabaseStar
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