SQL Server EXP()

SQL Server EXP() Function

The SQL Server EXP() function returns the value of e raised to the power of a specified number. This function is useful for exponential calculations.

Syntax

SELECT EXP(number);

The EXP() function takes a single argument:

  • number: The exponent to raise e to.

Example SQL Server EXP() Function Queries

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

1. Basic EXP() Example

SELECT EXP(1) AS result;

This query returns the value of e raised to the power of 1. The result will be:

result
------
2.718281828459045

2. EXP() with a Positive Number

SELECT EXP(2) AS result;

This query returns the value of e raised to the power of 2. The result will be:

result
------
7.3890560989306495

3. EXP() with a Negative Number

SELECT EXP(-1) AS result;

This query returns the value of e raised to the power of -1. The result will be:

result
------
0.36787944117144233

4. EXP() with a Column

SELECT value, EXP(value) AS exp_value
FROM numbers;

This query returns the value of e raised to the power of the value column for each record in the numbers table. The result will show the original value and its corresponding exp_value.

5. EXP() with a Variable

DECLARE @num FLOAT;
SET @num = 3;
SELECT EXP(@num) AS result;

This query uses a variable to store a numeric value and then returns e raised to its power. The result will be:

result
------
20.085536923187668

Full Example

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

Step 1: Creating a Table

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

CREATE TABLE example_table (
    id INT PRIMARY KEY,
    value FLOAT
);

In this example, we create a table named example_table with columns for id and value.

Step 2: Inserting Data into the Table

This step involves inserting some sample data into the example_table.

INSERT INTO example_table (id, value) VALUES (1, 1);
INSERT INTO example_table (id, value) VALUES (2, 2);
INSERT INTO example_table (id, value) VALUES (3, -1);
INSERT INTO example_table (id, value) VALUES (4, 0.5);

Here, we insert data into the example_table.

Step 3: Using the EXP() Function

This step involves using the EXP() function to return the value of e raised to the power of the value column.

SELECT id, value, EXP(value) AS exp_value
FROM example_table;

This query retrieves the id, value, and the exponential value of the value column for each row in the example_table. The result will be:

id  value  exp_value
--- ------ ----------
1   1      2.718281828459045
2   2      7.3890560989306495
3   -1     0.36787944117144233
4   0.5    1.6487212707001282

Conclusion

The SQL Server EXP() function is a powerful tool for returning the value of e raised to the power of a specified number. Understanding how to use the EXP() function and its syntax is essential for effective exponential calculations and data processing in SQL Server.