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+---
+Title: 'ADDDATE()'
+Description: 'Adds a specific interval to a given date.'
+Subjects:
+  - 'Computer Science'
+  - 'Data Science'
+Tags:
+  - 'Database'
+  - 'Date'
+  - 'MySQL'
+  - 'Queries'
+CatalogContent:
+  - 'learn-sql'
+  - 'paths/analyze-data-with-sql'
+---
+
+**`ADDDATE()`** function returns a new date by adding a specified time interval (such as days, months, or years) to a given date.
+
+## Syntax
+
+There are two versions of this operator:
+
+```pseudo
+ADDDATE(date, days);
+```
+
+Or, alternatively:
+
+```pseudo
+ADDDATE(date, INTERVAL value unit);
+```
+
+**Parameters:**
+
+- `date` (required): the date or datetime value (see [SQL Date Formats](https://www.codecademy.com/resources/docs/sql/date-format) for more information)
+- `days` (required): the number of days to add to `date`
+- `unit` (required): the unit of date/time to add
+  - The specified unit is one of the following:
+    - `MICROSECOND`
+    - `SECOND`
+    - `MINUTE`
+    - `HOUR`
+    - `DAY`
+    - `WEEK`
+    - `MONTH`
+    - `QUARTER`
+    - `YEAR`
+    - `SECOND_MICROSECOND`
+    - `MINUTE_MICROSECOND`
+    - `MINUTE_SECOND`
+    - `HOUR_MICROSECOND`
+    - `HOUR_SECOND`
+    - `HOUR_MINUTE`
+    - `DAY_MICROSECOND`
+    - `DAY_SECOND`
+    - `DAY_MINUTE`
+    - `DAY_HOUR`
+    - `YEAR_MONTH`
+- `value` (required): the value of the given date/time interval (`unit`) to add
+
+> **Note:** `ADDDATE()` is specific to MySQL. A similar function exists in SQL Server under the function [`DATEADD`](https://www.codecademy.com/resources/docs/sql/dates/dateadd) which has its own set of parameters.
+
+## Example 1: Adding days to a date
+
+In this example, `ADDDATE()` adds 7 days to a given date:
+
+```sql
+-- Using days = 5
+SELECT ADDDATE('2026-01-16', 5);
+
+-- Using value = 5 and unit = DAY
+SELECT ADDDATE('2026-01-16', INTERVAL 5 DAY);
+```
+
+This will return the following output:
+
+```shell
++--------------------------+
+| ADDDATE('2026-01-16', 5) |
++--------------------------+
+| 2026-01-21               |
++--------------------------+
++---------------------------------------+
+| ADDDATE('2026-01-16', INTERVAL 5 DAY) |
++---------------------------------------+
+| 2026-01-21                            |
++---------------------------------------+
+```
+
+In the same vein, `ADDDATE(date, 7)` and `ADDDATE(date, INTERVAL 1 WEEK)` will return the same result, as well as both `ADDDATE(datetime, INTERVAL 60 SECOND)` and `ADDDATE(datetime, INTERVAL 1 MINUTE)`.
+
+## Example 2: Using all supported formats
+
+In this example, `ADDDATE()` is used with different valid syntax formats:
+
+```sql
+SELECT
+  ADDDATE('2026-09-25 14:00:00', INTERVAL '7 1' DAY_HOUR) AS day_hour_result,
+  ADDDATE('2026-09-25', INTERVAL '1-1' YEAR_MONTH) AS year_month_result,
+  ADDDATE('2026-09-25 14:00:00', INTERVAL '6:23:42' HOUR_SECOND) AS hour_second_result,
+  ADDDATE('2026-09-25 16:00:00', INTERVAL '2.837' SECOND_MICROSECOND) AS second_microsecond_result;
+```
+
+```shell
++---------------------+-------------------+---------------------+----------------------------+
+| day_hour_result     | year_month_result | hour_second_result  | second_microsecond_result  |
++---------------------+-------------------+---------------------+----------------------------+
+| 2026-10-02 15:00:00 | 2027-10-25        | 2026-09-25 20:23:42 | 2026-09-25 16:00:02.837000 |
++---------------------+-------------------+---------------------+----------------------------+
+```
+
+## Example 3: Updating arrival times in a table
+
+Suppose a table stores bus routes and their scheduled arrival times:
+
+```sql
+CREATE TABLE sd_bus_routes (
+  ROUTE_ID INT PRIMARY KEY,
+  ROUTE_NAME VARCHAR(100),
+  ARRIVAL_TIME DATETIME
+);
+
+INSERT INTO sd_bus_routes
+VALUES
+  (1, 'Fashion Valley - La Mesa', '2026-08-28 16:11:00'),
+  (2, 'Downtown - North Park', '2026-08-28 16:14:00'),
+  (3, 'UCSD Med. Ctr. / Hillcrest Euclid Trolley', '2026-08-28 16:26:00');
+```
+
+Due to traffic delays, a new column is added to store updated arrival times:
+
+```sql
+ALTER TABLE sd_bus_routes
+ADD UPDATED_ARRIVAL_TIME DATETIME;
+```
+
+Each route is delayed by a different number of minutes. The updated times are calculated using `ADDDATE()`:
+
+```sql
+UPDATE sd_bus_routes
+SET UPDATED_ARRIVAL_TIME =
+  CASE
+    WHEN ROUTE_ID = 1 THEN ADDDATE(ARRIVAL_TIME, INTERVAL 10 MINUTE)
+    WHEN ROUTE_ID = 2 THEN ADDDATE(ARRIVAL_TIME, INTERVAL 12 MINUTE)
+    WHEN ROUTE_ID = 3 THEN ADDDATE(ARRIVAL_TIME, INTERVAL 15 MINUTE)
+  END;
+```
+
+The output will be:
+
+```shell
+| ROUTE_ID | ARRIVAL_TIME        | UPDATED_ARRIVAL_TIME |
+| -------- | ------------------- | -------------------- |
+| 1        | 2026-08-28 16:11:00 | 2026-08-28 16:21:00  |
+| 2        | 2026-08-28 16:14:00 | 2026-08-28 16:26:00  |
+| 3        | 2026-08-28 16:26:00 | 2026-08-28 16:41:00  |
+```