SQL Server SIN()

SQL Server SIN() Function

The SQL Server SIN() function returns the sine of a specified angle in radians. This function is useful for performing trigonometric calculations.

Syntax

SELECT SIN(angle_in_radians);

The SIN() function takes a single argument:

  • angle_in_radians: The angle in radians for which to calculate the sine.

Example SQL Server SIN() Function Queries

Let's look at some examples of SQL Server SIN() function queries:

1. Basic SIN() Example

SELECT SIN(PI() / 2) AS result;

This query returns the sine of π/2 radians (90 degrees). The result will be:

result
------
1.0

2. SIN() with π/4 Radians

SELECT SIN(PI() / 4) AS result;

This query returns the sine of π/4 radians (45 degrees). The result will be:

result
------
0.7071067811865475

3. SIN() with a Column

SELECT angle_in_radians, SIN(angle_in_radians) AS sine_value
FROM angles;

This query returns the sine of the angle_in_radians column for each record in the angles table. The result will show the original angle_in_radians and its corresponding sine_value.

4. SIN() with a Variable

DECLARE @angle FLOAT;
SET @angle = PI() / 6;
SELECT SIN(@angle) AS result;

This query uses a variable to store an angle in radians and then returns its sine. The result will be:

result
------
0.5

Full Example

Let's go through a complete example that includes creating a table, inserting data, and using the SIN() function.

Step 1: Creating a Table

This step involves creating a new table named angles to store some sample data.

CREATE TABLE angles (
    id INT PRIMARY KEY,
    angle_in_radians FLOAT
);

In this example, we create a table named angles with columns for id and angle_in_radians.

Step 2: Inserting Data into the Table

This step involves inserting some sample data into the angles table.

INSERT INTO angles (id, angle_in_radians) VALUES (1, PI() / 2);
INSERT INTO angles (id, angle_in_radians) VALUES (2, PI() / 4);
INSERT INTO angles (id, angle_in_radians) VALUES (3, PI() / 6);
INSERT INTO angles (id, angle_in_radians) VALUES (4, PI());

Here, we insert data into the angles table.

Step 3: Using the SIN() Function

This step involves using the SIN() function to return the sine of the angle_in_radians column.

SELECT id, angle_in_radians, SIN(angle_in_radians) AS sine_value
FROM angles;

This query retrieves the id, angle_in_radians, and the sine of the angle_in_radians column for each row in the angles table. The result will be:

id  angle_in_radians  sine_value
--- ----------------- ----------
1   1.5707963268      1.0
2   0.7853981634      0.7071067811865475
3   0.5235987756      0.5
4   3.1415926536      1.2246467991473532E-16

Conclusion

The SQL Server SIN() function is a powerful tool for returning the sine of a specified angle in radians. Understanding how to use the SIN() function and its syntax is essential for effective trigonometric calculations and data processing in SQL Server.