NOW, CURDATE, CURTIME in MySQL - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to get the current date and time using MySQL.

MySQL

SELECT [1]();

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

ANOW

BCURTIME

CCURDATE

DCURRENT_TIME

Attempts:

3 left

💡 Hint

Common Mistakes

Using CURDATE() when you want date and time.

Using CURTIME() when you want date and time.

The NOW() function returns the current date and time in MySQL.

2fill in blank

medium

Complete the code to get only the current date in MySQL.

MySQL

SELECT [1]();

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

ACURRENT_TIMESTAMP

BCURDATE

CNOW

DCURTIME

Attempts:

3 left

💡 Hint

Common Mistakes

Using NOW() when only the date is needed.

Using CURTIME() which returns only time.

The CURDATE() function returns only the current date in MySQL.

3fill in blank

hard

Fix the error in the code to get the current time in MySQL.

MySQL

SELECT [1]();

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

ANOW

BCURRENT_DATE

CCURDATE

DCURTIME

Attempts:

3 left

💡 Hint

Common Mistakes

Using CURDATE() when time is needed.

Using NOW() when only time is needed.

The CURTIME() function returns only the current time in MySQL.

4fill in blank

hard

Fill both blanks to select current date and current time separately.

MySQL

SELECT [1]() AS today, [2]() AS now_time;

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

ACURDATE

BNOW

CCURTIME

DCURRENT_TIMESTAMP

Attempts:

3 left

💡 Hint

Common Mistakes

Using NOW() for both blanks.

Mixing CURDATE() and NOW() in wrong order.

CURDATE() returns the current date, and CURTIME() returns the current time.

5fill in blank

hard

Fill all three blanks to select current date, current time, and current date and time.

MySQL

SELECT [1]() AS current_date, [2]() AS current_time, [3]() AS current_datetime;

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

ACURDATE

BCURTIME

CNOW

DCURRENT_DATE

Attempts:

3 left

💡 Hint

Common Mistakes

Using NOW() for all three blanks.

Confusing CURDATE() and CURRENT_DATE() functions.

CURDATE() returns the current date, CURTIME() returns the current time, and NOW() returns both date and time.

Practice

1. What does the MySQL function NOW() return?

easy

A. Only the current date

B. The current date and time

C. Only the current time

D. The current year

Solution

1. Step 1: Understand the function purpose

   NOW() is designed to return both date and time together.

2. Step 2: Compare with other functions

   CURDATE() returns only date, CURTIME() returns only time, so NOW() returns both.

3. Final Answer:

   The current date and time -> Option B

4. Quick Check:

   NOW() = current date + time [OK]

Hint: NOW() gives date and time together [OK]

Common Mistakes:

• Confusing NOW() with CURDATE()
• Thinking NOW() returns only time
• Assuming NOW() returns only year

2. Which of the following is the correct syntax to get only the current date in MySQL?

easy

A. SELECT CURDATE();

B. SELECT NOW();

C. SELECT CURRENT_TIME();

D. SELECT CURTIME();

Solution

1. Step 1: Identify function for current date

   CURDATE() returns only the current date in MySQL.

2. Step 2: Check other options

   NOW() returns date and time, CURRENT_TIME() and CURTIME() return only time.

3. Final Answer:

   SELECT CURDATE(); -> Option A

4. Quick Check:

   CURDATE() = current date only [OK]

Hint: Use CURDATE() for date only [OK]

Common Mistakes:

• Using NOW() when only date is needed
• Confusing CURTIME() with CURDATE()
• Using CURRENT_TIME() for date

3. What will be the output of this query if run at exactly 2024-06-15 14:30:45?

SELECT NOW(), CURDATE(), CURTIME();

medium

A. '2024-06-15 00:00:00', '14:30:45', '2024-06-15'

B. '2024-06-15', '14:30:45', '2024-06-15 14:30:45'

C. '14:30:45', '2024-06-15 14:30:45', '2024-06-15'

D. '2024-06-15 14:30:45', '2024-06-15', '14:30:45'

Solution

1. Step 1: Understand each function output

   NOW() returns full date and time, CURDATE() returns date only, CURTIME() returns time only.

2. Step 2: Match given time values

   At 2024-06-15 14:30:45, NOW() = '2024-06-15 14:30:45', CURDATE() = '2024-06-15', CURTIME() = '14:30:45'.

3. Final Answer:

   '2024-06-15 14:30:45', '2024-06-15', '14:30:45' -> Option D

4. Quick Check:

   NOW() = full datetime, CURDATE() = date, CURTIME() = time [OK]

Hint: NOW() full, CURDATE() date, CURTIME() time [OK]

Common Mistakes:

• Mixing order of outputs
• Assuming CURTIME() returns date
• Confusing NOW() with CURDATE()

4. Identify the error in this query:

SELECT NOW, CURDATE(), CURTIME();

medium

A. NOW is missing parentheses

B. CURDATE() should be CURTIME()

C. CURTIME() is misspelled

D. No error, query is correct

Solution

1. Step 1: Check function syntax

   MySQL functions require parentheses even if no arguments are passed. NOW without () is invalid.

2. Step 2: Verify other functions

   CURDATE() and CURTIME() have correct syntax with parentheses.

3. Final Answer:

   NOW is missing parentheses -> Option A

4. Quick Check:

   Functions need () even if empty [OK]

Hint: Always use () with MySQL functions [OK]

Common Mistakes:

• Omitting parentheses for functions
• Assuming functions can be called without ()
• Thinking CURDATE() is incorrect

5. You want to insert the current date and time into a table's created_at column. Which query correctly uses MySQL functions to do this?

hard

A. INSERT INTO logs (created_at) VALUES (CURDATE());

B. INSERT INTO logs (created_at) VALUES (CURTIME());

C. INSERT INTO logs (created_at) VALUES (NOW());

D. INSERT INTO logs (created_at) VALUES ('CURDATE()');

Solution

1. Step 1: Understand the column data type

   created_at usually stores full date and time, so we need a function that returns both.

2. Step 2: Choose correct function

   NOW() returns current date and time, CURDATE() returns only date, CURTIME() only time, and quoting function names inserts strings, not values.

3. Final Answer:

   INSERT INTO logs (created_at) VALUES (NOW()); -> Option C

4. Quick Check:

   Use NOW() for full datetime insert [OK]

Hint: Use NOW() to insert full date and time [OK]

Common Mistakes:

• Using CURDATE() when time is needed
• Using CURTIME() when date is needed
• Inserting function name as string