# SQL Server Level II

Canonical URL: <https://training-nyc.com/courses/sql-level-2>

## Overview

In this intermediate SQL course, you’ll build on your knowledge of SQL fundamentals, enhancing your skills to join, filter, group, and analyze data.

You’ll learn how to use Outer Joins and find NULL data. Group data and perform common statistical calculations using aggregate functions. Working with data requires the ability to change the data type when it’s not what you need (using CAST), and to be able to work with and format date and time information. 

By the end of this intermediate hands-on course, you’ll know more SQL techniques to extract and analyze the specific data you want from the database. This will enable you to more easily turn raw data into actionable insights.

## What you'll learn

- Learn to use Outer Joins and find NULL data
- Group data and perform common statistical calculations using Aggregate Functions
- Filter grouped data with HAVING
- Use CAST to make a data type fit your query’s needs
- Work with dates and time

## Prerequisites

SQL proficiency equivalent to our [SQL Level 1](/courses/sql-level-1) course is required, including basic querying, fundamentals of filtering (WHERE, LIKE, BETWEEN), and inner JOINs.

## Curriculum

### Inner vs Outer JOIN

#### Outer Joins & Finding NULLs

- Left Join
- Right Join
- Full Join
- Find NULL values

### Manipulating, Aggregating, & Filtering Data

#### Using CAST to Change Data Types

- Why and how to use CAST to make a data type fit your query’s needs

#### Aggregate Functions

- Using Aggregate Functions to perform common statistical calculations
- Using SUM, COUNT, AVG, MAX & MIN

#### Working with Dates & Time

- Date Functions: Getting the desired part of a date/time (Year, Month, Day, etc.)
- Formatting dates, including the day of the week (Sunday, Monday, etc.)
- Calculating the difference between 2 dates

### Grouping Data & Filtering Grouped Data

#### Grouping Data with Aggregate Functions

- Using GROUP BY to organize results into categories
- Applying Aggregate Functions to groups

#### Filtering Grouped Data with HAVING

- Using HAVING to filter the results of a GROUP BY
- HAVING vs WHERE

## Schedule
- Jun 11, 2026 10:00am–5:00pm — NYC
- Jul 28, 2026 10:00am–5:00pm — NYC
- Sep 23, 2026 10:00am–5:00pm — NYC
- Nov 3, 2026 10:00am–5:00pm — NYC

## Pricing

**Tuition:** $350