﻿ SQL: List the employees in ascending order of their salaries

# SQL Exercise: List the employees in ascending order of their salaries

## SQL employee Database: Exercise-66 with Solution

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66. From the following table, write a SQL query to find the employees and their salaries. Sort the result-set in ascending order by salaries. Return complete information about the employees.

Pictorial Presentation:

Sample table: employees

Sample Solution:

``````SELECT *
FROM employees
ORDER BY salary ASC;
``````

Sample Output:

``` emp_id | emp_name | job_name  | manager_id | hire_date  | salary  | commission | dep_id
--------+----------+-----------+------------+------------+---------+------------+--------
63679 | SANDRINE | CLERK     |      69062 | 1990-12-18 |  900.00 |            |   2001
69000 | JULIUS   | CLERK     |      66928 | 1991-12-03 | 1050.00 |            |   3001
68736 | ADNRES   | CLERK     |      67858 | 1997-05-23 | 1200.00 |            |   2001
65271 | WADE     | SALESMAN  |      66928 | 1991-02-22 | 1350.00 |     600.00 |   3001
66564 | MADDEN   | SALESMAN  |      66928 | 1991-09-28 | 1350.00 |    1500.00 |   3001
69324 | MARKER   | CLERK     |      67832 | 1992-01-23 | 1400.00 |            |   1001
68454 | TUCKER   | SALESMAN  |      66928 | 1991-09-08 | 1600.00 |       0.00 |   3001
64989 | ADELYN   | SALESMAN  |      66928 | 1991-02-20 | 1700.00 |     400.00 |   3001
67832 | CLARE    | MANAGER   |      68319 | 1991-06-09 | 2550.00 |            |   1001
66928 | BLAZE    | MANAGER   |      68319 | 1991-05-01 | 2750.00 |            |   3001
65646 | JONAS    | MANAGER   |      68319 | 1991-04-02 | 2957.00 |            |   2001
69062 | FRANK    | ANALYST   |      65646 | 1991-12-03 | 3100.00 |            |   2001
67858 | SCARLET  | ANALYST   |      65646 | 1997-04-19 | 3100.00 |            |   2001
68319 | KAYLING  | PRESIDENT |            | 1991-11-18 | 6000.00 |            |   1001
(14 rows)
```

Explanation:

The said query in SQL that retrieves all the rows from the 'employees' table and order them in ascending order based on the 'salary' column. This means that the employee with the lowest salary will come first.

Relational Algebra Expression:

Relational Algebra Tree:

## Practice Online

Sample Database: employee

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Previous SQL Exercise: List the employees in given department, joined after 91.
Next SQL Exercise: Employees in ascending and descending order.

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﻿

## SQL: Tips of the Day

Concatenate strings of a string field in a PostgreSQL 'group by' query:

Input:

```ID   COMPANY_ID   EMPLOYEE
1    1            Anna
2    1            Bill
3    2            Carol
4    2            Dave
```
```SELECT company_id, string_agg(employee, ', ')
FROM mytable
GROUP BY company_id;
```

Output:

```COMPANY_ID   EMPLOYEE
1            Anna, Bill
2            Carol, Dave
```

Database: PostgreSQL

Ref: https://bit.ly/2XTiRjq

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