WHERE with BETWEEN range in SQL - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to select employees with salaries between 3000 and 7000.

SQL

SELECT * FROM employees WHERE salary [1] 3000 AND 7000;

Drag options to blanks, or click blank then click option'

A>=

BIN

CBETWEEN

D=

Attempts:

3 left

💡 Hint

Common Mistakes

Using '=' instead of BETWEEN causes only exact matches.

Using 'IN' expects a list of values, not a range.

The BETWEEN keyword is used to filter values within a range, inclusive of the boundaries.

2fill in blank

medium

Complete the code to find products with prices between 10 and 50.

SQL

SELECT product_name FROM products WHERE price [1] 10 AND 50;

Drag options to blanks, or click blank then click option'

ABETWEEN

BLIKE

CIN

DNOT

Attempts:

3 left

💡 Hint

Common Mistakes

Using LIKE is for pattern matching, not ranges.

Using IN expects a list of discrete values.

BETWEEN filters rows where the price is between 10 and 50 inclusive.

3fill in blank

hard

Fix the error in the code to correctly select orders with order_date between '2023-01-01' and '2023-01-31'.

SQL

SELECT * FROM orders WHERE order_date [1] '2023-01-01' AND '2023-01-31';

Drag options to blanks, or click blank then click option'

ABETWEEN

BIN

C=

DLIKE

Attempts:

3 left

💡 Hint

Common Mistakes

Using '=' only matches one date.

Using IN expects a list of values, not a range.

The BETWEEN keyword correctly filters dates within the specified range.

4fill in blank

hard

Fill both blanks to select customers with age between 18 and 30.

SQL

SELECT * FROM customers WHERE age [1] [2];

Drag options to blanks, or click blank then click option'

ABETWEEN

BIN

C18 AND 30

D>

Attempts:

3 left

💡 Hint

Common Mistakes

Using IN instead of BETWEEN for ranges.

Not including both boundary values in the range.

The BETWEEN keyword followed by the range 18 AND 30 filters ages inclusively.

5fill in blank

hard

Fill all three blanks to select orders with total_amount between 100 and 500.

SQL

SELECT order_id FROM orders WHERE total_amount [1] [2] [3];

Drag options to blanks, or click blank then click option'

ABETWEEN

B100

CAND

D>

Attempts:

3 left

💡 Hint

Common Mistakes

Using > instead of BETWEEN for range filtering.

Omitting the AND keyword between range values.

The correct syntax is: total_amount BETWEEN 100 AND 500 to filter the range inclusively.

Practice

1. What does the SQL clause WHERE column BETWEEN 10 AND 20 do?

easy

A. Selects rows where the column value is greater than 10 but less than 20, excluding 10 and 20

B. Selects rows where the column value is between 10 and 20, including 10 and 20

C. Selects rows where the column value is exactly 10 or exactly 20 only

D. Selects rows where the column value is less than 10 or greater than 20

Solution

1. Step 1: Understand BETWEEN clause behavior

   The BETWEEN clause includes both the start and end values in the range.

2. Step 2: Apply to the given range 10 to 20

   This means values equal to 10, 20, or any number between them are selected.

3. Final Answer:

   Selects rows where the column value is between 10 and 20, including 10 and 20 -> Option B

4. Quick Check:

   BETWEEN includes boundaries = B [OK]

Hint: BETWEEN includes both start and end values [OK]

Common Mistakes:

• Thinking BETWEEN excludes boundary values
• Confusing BETWEEN with > and < operators
• Assuming BETWEEN works only with numbers

2. Which of the following is the correct syntax to select rows where age is between 18 and 30?

easy

A. SELECT * FROM users WHERE age BETWEEN (18 AND 30);

B. SELECT * FROM users WHERE age BETWEEN 18 TO 30;

C. SELECT * FROM users WHERE age BETWEEN 18, 30;

D. SELECT * FROM users WHERE age BETWEEN 18 AND 30;

Solution

1. Step 1: Recall correct BETWEEN syntax

   The correct syntax uses BETWEEN start AND end without commas or parentheses.

2. Step 2: Check each option

   SELECT * FROM users WHERE age BETWEEN 18 AND 30; uses correct syntax: BETWEEN 18 AND 30. Others have syntax errors.

3. Final Answer:

   SELECT * FROM users WHERE age BETWEEN 18 AND 30; -> Option D

4. Quick Check:

   BETWEEN ... AND ... syntax = D [OK]

Hint: BETWEEN always uses AND, never TO or commas [OK]

Common Mistakes:

• Using TO instead of AND
• Adding commas between values
• Using parentheses around BETWEEN clause

3. Given the table products with a column price, what rows will this query return?

SELECT * FROM products WHERE price BETWEEN 50 AND 100;

Assume the prices in the table are: 45, 50, 75, 100, 120.

medium

A. Rows with prices 50, 75, and 100

B. Rows with prices 45, 50, 75, 100, and 120

C. Rows with prices 75 and 100 only

D. Rows with prices 50 and 100 only

Solution

1. Step 1: Identify the range in BETWEEN clause

   The query filters prices between 50 and 100, including both 50 and 100.

2. Step 2: Check which prices fall in this range

   Prices 50, 75, and 100 are within the range; 45 and 120 are outside.

3. Final Answer:

   Rows with prices 50, 75, and 100 -> Option A

4. Quick Check:

   BETWEEN includes boundaries, so 50 and 100 included = A [OK]

Hint: BETWEEN includes start and end values in results [OK]

Common Mistakes:

• Excluding boundary values 50 and 100
• Including values outside the range like 45 or 120
• Confusing BETWEEN with > and < operators

4. Identify the error in this SQL query:

SELECT * FROM orders WHERE order_date BETWEEN '2023-01-01' TO '2023-01-31';

medium

A. Using TO instead of AND in BETWEEN clause

B. Dates should not be in quotes

C. BETWEEN cannot be used with dates

D. Missing semicolon at the end

Solution

1. Step 1: Check BETWEEN syntax

   BETWEEN requires AND between the two values, not TO.

2. Step 2: Validate other parts

   Dates in quotes are correct, BETWEEN works with dates, and semicolon is optional in many systems.

3. Final Answer:

   Using TO instead of AND in BETWEEN clause -> Option A

4. Quick Check:

   BETWEEN uses AND, not TO = A [OK]

Hint: BETWEEN always uses AND, never TO [OK]

Common Mistakes:

• Replacing AND with TO in BETWEEN
• Thinking dates can't be quoted
• Assuming semicolon is mandatory

5. You want to select employees hired between January 1, 2020, and December 31, 2022, inclusive. Which query correctly uses BETWEEN and also excludes employees hired on weekends?

SELECT * FROM employees WHERE hire_date BETWEEN '2020-01-01' AND '2022-12-31' AND EXTRACT(DOW FROM hire_date) NOT IN (0,6);

What does this query do?

hard

A. Selects employees hired between the dates including weekends

B. Selects employees hired only on weekends between the dates

C. Selects employees hired between the dates excluding weekends

D. Syntax error due to EXTRACT usage

Solution

1. Step 1: Understand BETWEEN usage

   The query selects employees hired from 2020-01-01 to 2022-12-31 inclusive.

2. Step 2: Analyze EXTRACT(DOW FROM hire_date) condition

   EXTRACT(DOW) returns day of week (0=Sunday, 6=Saturday). NOT IN (0,6) excludes weekends.

3. Step 3: Combine conditions

   Only employees hired on weekdays within the date range are selected.

4. Final Answer:

   Selects employees hired between the dates excluding weekends -> Option C

5. Quick Check:

   BETWEEN + weekday filter = C [OK]

Hint: Use BETWEEN for range and filter weekdays with EXTRACT [OK]

Common Mistakes:

• Assuming BETWEEN excludes boundaries
• Confusing day numbers for weekend days
• Thinking EXTRACT causes syntax error