How to add a column from a select query but the value from the new column will be the row count of the MySQL select query?

For this, you can use MySQL row_number(). Let us first create a table −

mysql> create table DemoTable1342
   -> (
   -> Score int
   -> );
Query OK, 0 rows affected (0.68 sec)

Insert some records in the table using insert command −

mysql> insert into DemoTable1342 values(80);
Query OK, 1 row affected (0.24 sec)
mysql> insert into DemoTable1342 values(98);
Query OK, 1 row affected (0.09 sec)
mysql> insert into DemoTable1342 values(78);
Query OK, 1 row affected (0.14 sec)
mysql> insert into DemoTable1342 values(89);
Query OK, 1 row affected (0.07 sec)

Display all records from the table using select statement −

mysql> select * from DemoTable1342;

This will produce the following output −

+-------+
| Score |
+-------+
|    80 |
|    98 |
|    78 |
|    89 |
+-------+
4 rows in set (0.00 sec)

Following is the query to add a column from a select query but the value from the new column will be the row count of the MySQL select query −

mysql> select Score,row_number() over() as `Rank` from DemoTable1342 order by Score DESC;

This will produce the following output −

+-------+------+
| Score | Rank |
+-------+------+
|    98 |    1 |
|    89 |    2 |
|    80 |    3 |
|    78 |    4 |
+-------+------+
4 rows in set (0.32 sec)

AmitDiwan

Published on 05-Nov-2019 07:30:01

• Related Questions & Answers
• MySQL SELECT to add a new column to a query and give it a value?
• MySQL query to select average from distinct column of table?
• Select the table name as a column in a UNION select query with MySQL?
• How to get a specific column record from SELECT query in MySQL?
• MySQL query to select the nth highest value in a column by skipping values
• MySQL query to select all the records only from a specific column of a table with multiple columns
• MySQL query to return the count of only NO values from corresponding column value
• Select minimum row value from a column with corresponding duplicate column values in MySQL
• How to select the maximum value of a column in MySQL?
• Select the minimum value from the maximum values of two tables with a single MySQL query?
• MySQL query to SELECT rows with LIKE and create new column containing the matched string?
• MySQL query to display the count of distinct records from a column with duplicate records
• A single MySQL query to select value from first table and insert in the second?
• MySQL query to fetch the maximum corresponding value from duplicate column values
• MySQL query to group by names and display the count in a new column