课程

Intermediate SQL Server

中级技能水平

更新时间 2024年11月

In this course, you will use T-SQL, the flavor of SQL used in Microsoft's SQL Server for data analysis.

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课程描述

A majority of data is stored in databases and knowing the necessary tools needed to analyze and clean data directly in databases is indispensable. This course focuses on T-SQL, the version of SQL used in Microsoft SQL Server, needed for data analysis. You will learn several concepts in this course such as dealing with missing data, working with dates, and calculating summary statistics using advanced queries. After completing this course, you will have the skills needed to analyze data and provide insights quickly and easily.

先决条件

Introduction to SQL Server

1

Summarizing Data

One of the first steps in data analysis is examining data through aggregations. This chapter explores how to create aggregations in SQL Server, a common first step in data exploration. You will also clean missing data and categorize data into bins with CASE statements.

Data analysis with aggregations

50 经验值

Creating aggregations

100 经验值

Creating grouped aggregations

100 经验值

Dealing with missing data

50 经验值

Removing missing values

100 经验值

Imputing missing values (I)

100 经验值

Imputing missing values (II)

100 经验值

Binning data with CASE

50 经验值

Using CASE statements

100 经验值

Creating several groups with CASE

100 经验值

2

Math Functions

This chapter explores essential math operations such as rounding numbers, calculating squares and square roots, and counting records. You will also work with dates in this chapter!

Counting and totals

50 经验值

Calculating the total

100 经验值

Counting the number of rows

100 经验值

50 经验值

Which date function should you use?

50 经验值

Counting the number of days between dates

100 经验值

Adding days to a date

100 经验值

Rounding and truncating

50 经验值

Rounding numbers

100 经验值

Truncating numbers

100 经验值

More math functions

50 经验值

Calculating the absolute value

100 经验值

Calculating squares and square roots

100 经验值

3

Processing Data in SQL Server

In this chapter, you will create variables and write while loops to process data. You will also write complex queries by using derived tables and common table expressions.

WHILE loops

50 经验值

Creating and using variables

100 经验值

Creating a WHILE loop

100 经验值

Derived tables

50 经验值

Queries with derived tables (I)

100 经验值

Queries with derived tables (II)

100 经验值

Common Table Expressions

50 经验值

50 经验值

Creating CTEs (I)

100 经验值

Creating CTEs (II)

100 经验值

4

Window Functions

In the final chapter of this course, you will work with partitions of data and window functions to calculate several summary stats and see how easy it is to create running totals and compute the mode of numeric columns.

Window functions in T-SQL

50 经验值

Window functions with aggregations (I)

100 经验值

Window functions with aggregations (II)

100 经验值

Common window functions

50 经验值

Do you know window functions?

50 经验值

First value in a window

100 经验值

Previous and next values

100 经验值

Increasing window complexity

50 经验值

Creating running totals

100 经验值

Assigning row numbers

100 经验值

Using windows for statistical functions

50 经验值

Calculating standard deviation

100 经验值

Calculating mode (I)

100 经验值

Calculating mode (II)

100 经验值

Intermediate SQL Server

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