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1. SQRT Function​

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1. SQRT Function​

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The SQRT function in H2 database is used to calculate the square root of a given number.

2. Syntax​

The syntax for the SQRT function in H2 database is as follows:

SQRT(number)

Arguments​

  • number: The number for which the square root needs to be calculated. It should be a numeric value.

Return​

  • The SQRT function returns the square root of the given number.

3. Notes​

  • The SQRT function in H2 database expects a non-negative numeric value as input. If the input number is negative, the function will return NULL.
  • If the input number is not a number or exceeds the numeric range, the SQRT function will return NULL.
  • Ensure that the input number is of the correct datatype and within the valid range to avoid errors.

4. Examples​

Here are a few examples demonstrating the usage of the SQRT function in H2 database:

Example 1 - Calculating the square root of a positive number:​

SELECT SQRT(25) AS square_root;

Output:

square_root
-----------
5.0

Example 2 - Calculating the square root of a column value:​

CREATE TABLE numbers (
  id INT PRIMARY KEY,
  value DOUBLE
);

INSERT INTO numbers VALUES (1, 16), (2, 9), (3, 25);

SELECT id, value, SQRT(value) AS square_root
FROM numbers;

Output:

id | value | square_root
---+-------+------------
1  | 16    | 4.0
2  | 9     | 3.0
3  | 25    | 5.0
  • POW - Calculate power
  • exp - Calculate exponential value