Selecting Data

---

Figure 1

Image 1 of 1: ‘Database diagram.’

---

Sorting and Removing Duplicates

---

Filtering

---

Figure 1

Image 1 of 1: ‘SQL Filtering in Action’

---

Calculating New Values

---

Missing Data

---

Aggregation

---

Figure 1

Image 1 of 1: ‘SQL Aggregation’

---

Combining Data

---

Figure 1

Image 1 of 1: ‘Survey Database Structure’

---

Data Hygiene

---

Creating and Modifying Data

---

Programming with Databases - Python

---

Programming with Databases - R

---

Figure 1

Image 1 of 1: ‘relevant XKCD’

---