Explore Library
Databases & SQLBasic SQL Queries (SELECT, WHERE, ORDER BY)

82 items

1

Fix the JOIN Condition

Code Quiz
2

Selecting and Ordering Query Results

Quiz
3

Clause Order in a Grouped Join Query

Code Quiz
4

Filtering Rows with WHERE

Quiz
5

Filtering Rows With NULL Values

Code Quiz
6

SQL Clause Execution Order

Quiz
7

Filter Aggregates with HAVING

Code Quiz
8

Filtering and Sorting Results

Quiz
9

Core SQL Querying Essentials

Slides / Video
10

Filtering Aggregated Results

Quiz
11

SQL Query Building Blocks

Flashcard
12

Selecting All Columns With The Wildcard

Slides / Video
13

Removing Duplicates With DISTINCT

Quiz
14

Column Aliases With AS

Quiz
15

String Literals And Quoting

Quiz
16

Limiting Result Rows

Quiz
17

Sorting By Multiple Columns

Quiz
18

Ascending vs Descending Sort

Quiz
19

Sorting With ORDER BY

Quiz
20

Filtering NULL Values

Quiz
21

Pattern Matching With LIKE

Quiz
22

Set Membership With IN

Quiz
23

Range Filtering With BETWEEN

Quiz
24

Negating With NOT

Quiz
25

Combining With AND / OR

Quiz
26

Comparison Operators

Quiz
27

Filtering With WHERE

Quiz
28

Selecting Specific Columns

Quiz
29

Selecting All Columns

Quiz
30

Logical Order Of Clauses

Quiz
31

SQL Syntax Basics

Slides / Video
32

Limiting Rows With LIMIT and TOP

Slides / Video
33

Removing Duplicates With DISTINCT

Slides / Video
34

Sorting by Multiple Columns

Slides / Video
35

Ascending and Descending Order

Slides / Video
36

Sorting Results With ORDER BY

Slides / Video
37

Handling NULLs With IS NULL

Slides / Video
38

Set Membership Filtering With IN

Slides / Video
39

Range Filtering With BETWEEN

Slides / Video
40

Pattern Matching With LIKE

Slides / Video
41

Combining Conditions With AND, OR, NOT

Slides / Video
42

SQL Comparison Operators in WHERE

Slides / Video
43

Filtering Rows With WHERE

Slides / Video
44

Renaming Columns With AS Aliases

Slides / Video
45

Specifying Tables With FROM

Slides / Video
46

Sorting Descending

Code Quiz
47

Selecting All Columns

Code Quiz
48

Selecting Specific Columns

Code Quiz
49

Column Aliases With AS

Code Quiz
50

WHERE Comparison Operator

Code Quiz
51

Combining Conditions

Code Quiz
52

Filtering Ranges With BETWEEN

Code Quiz
53

Filtering With IN

Code Quiz
54

Pattern Matching With LIKE

Code Quiz
55

Handling NULL Values

Code Quiz
56

Sorting With ORDER BY

Code Quiz
57

Sorting By Multiple Columns

Code Quiz
58

Removing Duplicates With DISTINCT

Code Quiz
59

Limiting Returned Rows

Code Quiz
60

Clause Order In A Query

Code Quiz
61

Selecting Specific Columns by Name

Slides / Video
62

The SELECT Statement's Purpose

Slides / Video
63

Comparison Operators

Flashcard
64

BETWEEN Operator for Ranges

Flashcard
65

Filtering with IS NULL / IS NOT NULL

Flashcard
66

Ascending vs Descending Sort

Flashcard
67

Selecting Specific Columns

Flashcard
68

Statement Termination with Semicolon

Flashcard
69

ORDER BY for Sorting

Flashcard
70

LIKE Operator and Wildcards

Flashcard
71

Logical Operators AND, OR, NOT

Flashcard
72

Column Aliases with AS

Flashcard
73

LIMIT Clause to Restrict Rows

Flashcard
74

WHERE Clause for Filtering

Flashcard
75

IN Operator for Value Lists

Flashcard
76

Sorting by Multiple Columns

Flashcard
77

String Literals and Quoting

Flashcard
78

Case Sensitivity and Conventions

Flashcard
79

SELECT Statement Basic Syntax

Flashcard
80

FROM Clause and Table Name

Flashcard
81

Selecting All Columns with *

Flashcard
82

SELECT DISTINCT for Unique Values

Flashcard
QuizAdvanced

Filtering Rows with WHERE

Learn which SQL clause filters individual rows before grouping occurs.

In the query SELECT department, COUNT(*) FROM employees WHERE salary > 50000 GROUP BY department;, what is the role of the WHERE clause?