Term entry sql log10

content/sql/concepts/math-functions/terms/log10/log10.md

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+---
+Title: 'LOG10()'
+Description: 'Calculates the base-10 logarithm of a number.'
+Subjects:
+  - 'Data Science'
+  - 'Computer Science'
+Tags:
+  - 'SQL'
+  - 'MySQL'
+  - 'PostgreSQL'
+  - 'SQLite'
+  - 'Functions'
+CatalogContent:
+  - 'learn-sql'
+  - 'paths/analyze-data-with-sql'
+---
+
+The **`LOG10()`** SQL function calculates the base-10 logarithm of a number.
+
+## Syntax
+
+```sql
+LOG10(number)
+```
+
+The `LOG10()` function takes one required parameter, `number`:
+
+- A `float` type number greater than `0`.
+- An expression resulting in a `float` type number (e.g. `EXP(10)` or `10*10`).
+
+The `LOG10()` function returns the base-10 logarithm of `number` as a `float`.
+
+> **Note:** The `LOG10()` function is compatible with various SQL database systems such as MySQL, PostgreSQL, SQL Server and Oracle.
+
+## Example
+
+The table below, called `POWER_OF_TEN`, contains powers of `10`:
+
+| num_id | num_10 |
+| ------ | ------ |
+| 1      | 1      |
+| 2      | 10     |
+| 3      | 100    |
+
+The `LOG10()` function can calculate the base-10 logarithm of each number in the `POWER_OF_TEN` table:
+
+```sql
+SELECT num_id, LOG10(num_10) AS num_log10
+FROM POWER_OF_TEN;
+```
+
+The above example results in the following output:
+
+| num_id | num_log10 |
+| ------ | --------- |
+| 1      | 0         |
+| 2      | 1         |
+| 3      | 2         |