ceaa6104cd
* SQL MAX function A small article about SQL MAX function. The examples were based on the examples of sql-where-clause article. * fixed title syntax * Correcting Title Correcting Title from "SQL Min Function" to "SQL Max Function"
78 lines
3.1 KiB
Markdown
78 lines
3.1 KiB
Markdown
---
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title: SQL Max Function
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---
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## SQL Maximum (MAX) Function
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SQL MAX Function is used to get the maximum value of a column in a table.
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Here is the syntax for using the function:
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```sql
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SELECT column1, column2, ..., columnN, MAX(aggregated_column)
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FROM table1
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GROUP BY column1, column2, ..., columnN
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```
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### Example 1
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Our table looks like the following:
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```text
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+-----------+------------------------+-----------+---------------------+
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| studentID | FullName | sat_score | rcd_updated |
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+-----------+------------------------+-----------+---------------------+
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| 1 | Monique Davis | 400 | 2017-08-16 15:34:50 |
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| 2 | Teri Gutierrez | 800 | 2017-08-16 15:34:50 |
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| 3 | Spencer Pautier | 1000 | 2017-08-16 15:34:50 |
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| 4 | Louis Ramsey | 1200 | 2017-08-16 15:34:50 |
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| 5 | Alvin Greene | 1200 | 2017-08-16 15:34:50 |
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| 6 | Sophie Freeman | 1200 | 2017-08-16 15:34:50 |
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| 7 | Edgar Frank "Ted" Codd | 2400 | 2017-08-16 15:35:33 |
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| 8 | Donald D. Chamberlin | 2400 | 2017-08-16 15:35:33 |
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| 9 | Raymond F. Boyce | 2400 | 2017-08-16 15:35:33 |
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+-----------+------------------------+-----------+---------------------+
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```
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For the above table we would like to find out the maximum SAT score. Here is the SQL statement that we will use:
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```sql
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SELECT MAX(sat_score) FROM student;
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```
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The result will be:
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```text
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+-----------+
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| sat_score |
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+-----------+
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| 2400 |
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+-----------+
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```
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### Example 2
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Our table looks like the following:
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```text
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+-----------+------------------------+---------+-----------+---------------------+
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| studentID | FullName | state | sat_score | rcd_updated |
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+-----------+------------------------+---------+-----------+---------------------+
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| 1 | Monique Davis | TX | 400 | 2017-08-16 15:34:50 |
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| 2 | Teri Gutierrez | NY | 800 | 2017-08-16 15:34:50 |
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| 3 | Spencer Pautier | CA | 1000 | 2017-08-16 15:34:50 |
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| 4 | Louis Ramsey | IA | 1200 | 2017-08-16 15:34:50 |
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| 5 | Alvin Greene | CA | 1200 | 2017-08-16 15:34:50 |
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| 6 | Sophie Freeman | CO | 1200 | 2017-08-16 15:34:50 |
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| 7 | Edgar Frank "Ted" Codd | NY | 2400 | 2017-08-16 15:35:33 |
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| 8 | Donald D. Chamberlin | CA | 2400 | 2017-08-16 15:35:33 |
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| 9 | Raymond F. Boyce | TX | 2400 | 2017-08-16 15:35:33 |
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+-----------+------------------------+---------+-----------+---------------------+
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```
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For the above table we would like to find out the maximum SAT score per State. Here is the SQL statement that we will use:
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```sql
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SELECT state, MAX(sat_score)
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FROM student
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GROUP BY state;
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```
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The result will be:
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```text
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+---------+-----------+
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| state | sat_score |
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+---------+-----------+
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| TX | 2400 |
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| NY | 2400 |
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| CA | 2400 |
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| IA | 1200 |
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| CO | 1200 |
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+---------+-----------+
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```
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