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SQLite Exercise: Find the names, the salary of the employees who earn more than the average salary and who works in any of the IT departments

Write a query to find the names (first_name, last_name), the salary of the employees who earn more than the average salary and who works in any of the IT departments.

Sample table : employees

+-------------+-------------+-------------+----------+--------------------+------------+------------+----------+----------------+------------+---------------+
| EMPLOYEE_ID | FIRST_NAME  | LAST_NAME   | EMAIL    | PHONE_NUMBER       | HIRE_DATE  | JOB_ID     | SALARY   | COMMISSION_PCT | MANAGER_ID | DEPARTMENT_ID |
+-------------+-------------+-------------+----------+--------------------+------------+------------+----------+----------------+------------+---------------+
|         100 | Steven      | King        | SKING    | 515.123.4567       | 1987-06-17 | AD_PRES    | 24000.00 |           0.00 |          0 | 		  90 |
|         101 | Neena       | Kochhar     | NKOCHHAR | 515.123.4568       | 1987-06-18 | AD_VP      | 17000.00 |           0.00 |        100 |            90 |
|         102 | Lex         | De Haan     | LDEHAAN  | 515.123.4569       | 1987-06-19 | AD_VP      | 17000.00 |           0.00 |        100 |            90 |
|         103 | Alexander   | Hunold      | AHUNOLD  | 590.423.4567       | 1987-06-20 | IT_PROG    |  9000.00 |           0.00 |        102 |            60 |
|         104 | Bruce       | Ernst       | BERNST   | 590.423.4568       | 1987-06-21 | IT_PROG    |  6000.00 |           0.00 |        103 |            60 |
|         105 | David       | Austin      | DAUSTIN  | 590.423.4569       | 1987-06-22 | IT_PROG    |  4800.00 |           0.00 |        103 |            60 |
|         106 | Valli       | Pataballa   | VPATABAL | 590.423.4560       | 1987-06-23 | IT_PROG    |  4800.00 |           0.00 |        103 |            60 |
|         107 | Diana       | Lorentz     | DLORENTZ | 590.423.5567       | 1987-06-24 | IT_PROG    |  4200.00 |           0.00 |        103 |            60 |
|         108 | Nancy       | Greenberg   | NGREENBE | 515.124.4569       | 1987-06-25 | FI_MGR     | 12000.00 |           0.00 |        101 |           100 |
|         109 | Daniel      | Faviet      | DFAVIET  | 515.124.4169       | 1987-06-26 | FI_ACCOUNT |  9000.00 |           0.00 |        108 |           100 |
|         110 | John        | Chen        | JCHEN    | 515.124.4269       | 1987-06-27 | FI_ACCOUNT |  8200.00 |           0.00 |        108 |           100 |
|         111 | Ismael      | Sciarra     | ISCIARRA | 515.124.4369       | 1987-06-28 | FI_ACCOUNT |  7700.00 |           0.00 |        108 |           100 |
|         112 | Jose Manuel | Urman       | JMURMAN  | 515.124.4469       | 1987-06-29 | FI_ACCOUNT |  7800.00 |           0.00 |        108 |           100 |
|         113 | Luis        | Popp        | LPOPP    | 515.124.4567       | 1987-06-30 | FI_ACCOUNT |  6900.00 |           0.00 |        108 |           100 |
|         114 | Den         | Raphaely    | DRAPHEAL | 515.127.4561       | 1987-07-01 | PU_MAN     | 11000.00 |           0.00 |        100 |            30 |
|         115 | Alexander   | Khoo        | AKHOO    | 515.127.4562       | 1987-07-02 | PU_CLERK   |  3100.00 |           0.00 |        114 |            30 |
|         116 | Shelli      | Baida       | SBAIDA   | 515.127.4563       | 1987-07-03 | PU_CLERK   |  2900.00 |           0.00 |        114 |            30 |
|         117 | Sigal       | Tobias      | STOBIAS  | 515.127.4564       | 1987-07-04 | PU_CLERK   |  2800.00 |           0.00 |        114 |            30 |
|         118 | Guy         | Himuro      | GHIMURO  | 515.127.4565       | 1987-07-05 | PU_CLERK   |  2600.00 |           0.00 |        114 |            30 |
|         119 | Karen       | Colmenares  | KCOLMENA | 515.127.4566       | 1987-07-06 | PU_CLERK   |  2500.00 |           0.00 |        114 |            30 |
|         120 | Matthew     | Weiss       | MWEISS   | 650.123.1234       | 1987-07-07 | ST_MAN     |  8000.00 |           0.00 |        100 |            50 |
|         121 | Adam        | Fripp       | AFRIPP   | 650.123.2234       | 1987-07-08 | ST_MAN     |  8200.00 |           0.00 |        100 |            50 |
|         122 | Payam       | Kaufling    | PKAUFLIN | 650.123.3234       | 1987-07-09 | ST_MAN     |  7900.00 |           0.00 |        100 |            50 |
|         123 | Shanta      | Vollman     | SVOLLMAN | 650.123.4234       | 1987-07-10 | ST_MAN     |  6500.00 |           0.00 |        100 |            50 |
|         124 | Kevin       | Mourgos     | KMOURGOS | 650.123.5234       | 1987-07-11 | ST_MAN     |  5800.00 |           0.00 |        100 |            50 |
|         125 | Julia       | Nayer       | JNAYER   | 650.124.1214       | 1987-07-12 | ST_CLERK   |  3200.00 |           0.00 |        120 |            50 |
|         126 | Irene       | Mikkilineni | IMIKKILI | 650.124.1224       | 1987-07-13 | ST_CLERK   |  2700.00 |           0.00 |        120 |            50 |
|         127 | James       | Landry      | JLANDRY  | 650.124.1334       | 1987-07-14 | ST_CLERK   |  2400.00 |           0.00 |        120 |            50 |
|         128 | Steven      | Markle      | SMARKLE  | 650.124.1434       | 1987-07-15 | ST_CLERK   |  2200.00 |           0.00 |        120 |            50 |
|         129 | Laura       | Bissot      | LBISSOT  | 650.124.5234       | 1987-07-16 | ST_CLERK   |  3300.00 |           0.00 |        121 |            50 |
|         130 | Mozhe       | Atkinson    | MATKINSO | 650.124.6234       | 1987-07-17 | ST_CLERK   |  2800.00 |           0.00 |        121 |            50 |
|         131 | James       | Marlow      | JAMRLOW  | 650.124.7234       | 1987-07-18 | ST_CLERK   |  2500.00 |           0.00 |        121 |            50 |
|         132 | TJ          | Olson       | TJOLSON  | 650.124.8234       | 1987-07-19 | ST_CLERK   |  2100.00 |           0.00 |        121 |            50 |
|         133 | Jason       | Mallin      | JMALLIN  | 650.127.1934       | 1987-07-20 | ST_CLERK   |  3300.00 |           0.00 |        122 |            50 |
|         134 | Michael     | Rogers      | MROGERS  | 650.127.1834       | 1987-07-21 | ST_CLERK   |  2900.00 |           0.00 |        122 |            50 |
|         135 | Ki          | Gee         | KGEE     | 650.127.1734       | 1987-07-22 | ST_CLERK   |  2400.00 |           0.00 |        122 |            50 |
|         136 | Hazel       | Philtanker  | HPHILTAN | 650.127.1634       | 1987-07-23 | ST_CLERK   |  2200.00 |           0.00 |        122 |            50 |
|         137 | Renske      | Ladwig      | RLADWIG  | 650.121.1234       | 1987-07-24 | ST_CLERK   |  3600.00 |           0.00 |        123 |            50 |
|         138 | Stephen     | Stiles      | SSTILES  | 650.121.2034       | 1987-07-25 | ST_CLERK   |  3200.00 |           0.00 |        123 |            50 |
|         139 | John        | Seo         | JSEO     | 650.121.2019       | 1987-07-26 | ST_CLERK   |  2700.00 |           0.00 |        123 |            50 |
|         140 | Joshua      | Patel       | JPATEL   | 650.121.1834       | 1987-07-27 | ST_CLERK   |  2500.00 |           0.00 |        123 |            50 |
|         141 | Trenna      | Rajs        | TRAJS    | 650.121.8009       | 1987-07-28 | ST_CLERK   |  3500.00 |           0.00 |        124 |            50 |
|         142 | Curtis      | Davies      | CDAVIES  | 650.121.2994       | 1987-07-29 | ST_CLERK   |  3100.00 |           0.00 |        124 |            50 |
|         143 | Randall     | Matos       | RMATOS   | 650.121.2874       | 1987-07-30 | ST_CLERK   |  2600.00 |           0.00 |        124 |            50 |
|         144 | Peter       | Vargas      | PVARGAS  | 650.121.2004       | 1987-07-31 | ST_CLERK   |  2500.00 |           0.00 |        124 |            50 |
|         145 | John        | Russell     | JRUSSEL  | 011.44.1344.429268 | 1987-08-01 | SA_MAN     | 14000.00 |           0.40 |        100 |            80 |
|         146 | Karen       | Partners    | KPARTNER | 011.44.1344.467268 | 1987-08-02 | SA_MAN     | 13500.00 |           0.30 |        100 |            80 |
|         147 | Alberto     | Errazuriz   | AERRAZUR | 011.44.1344.429278 | 1987-08-03 | SA_MAN     | 12000.00 |           0.30 |        100 |            80 |
|         148 | Gerald      | Cambrault   | GCAMBRAU | 011.44.1344.619268 | 1987-08-04 | SA_MAN     | 11000.00 |           0.30 |        100 |            80 |
|         149 | Eleni       | Zlotkey     | EZLOTKEY | 011.44.1344.429018 | 1987-08-05 | SA_MAN     | 10500.00 |           0.20 |        100 |            80 |
|         150 | Peter       | Tucker      | PTUCKER  | 011.44.1344.129268 | 1987-08-06 | SA_REP     | 10000.00 |           0.30 |        145 |            80 |
|         151 | David       | Bernstein   | DBERNSTE | 011.44.1344.345268 | 1987-08-07 | SA_REP     |  9500.00 |           0.25 |        145 |            80 |
|         152 | Peter       | Hall        | PHALL    | 011.44.1344.478968 | 1987-08-08 | SA_REP     |  9000.00 |           0.25 |        145 |            80 |
|         153 | Christopher | Olsen       | COLSEN   | 011.44.1344.498718 | 1987-08-09 | SA_REP     |  8000.00 |           0.20 |        145 |            80 |
|         154 | Nanette     | Cambrault   | NCAMBRAU | 011.44.1344.987668 | 1987-08-10 | SA_REP     |  7500.00 |           0.20 |        145 |            80 |
|         155 | Oliver      | Tuvault     | OTUVAULT | 011.44.1344.486508 | 1987-08-11 | SA_REP     |  7000.00 |           0.15 |        145 |            80 |
|         156 | Janette     | King        | JKING    | 011.44.1345.429268 | 1987-08-12 | SA_REP     | 10000.00 |           0.35 |        146 |            80 |
|         157 | Patrick     | Sully       | PSULLY   | 011.44.1345.929268 | 1987-08-13 | SA_REP     |  9500.00 |           0.35 |        146 |            80 |
|         158 | Allan       | McEwen      | AMCEWEN  | 011.44.1345.829268 | 1987-08-14 | SA_REP     |  9000.00 |           0.35 |        146 |            80 |
|         159 | Lindsey     | Smith       | LSMITH   | 011.44.1345.729268 | 1987-08-15 | SA_REP     |  8000.00 |           0.30 |        146 |            80 |
|         160 | Louise      | Doran       | LDORAN   | 011.44.1345.629268 | 1987-08-16 | SA_REP     |  7500.00 |           0.30 |        146 |            80 |
|         161 | Sarath      | Sewall      | SSEWALL  | 011.44.1345.529268 | 1987-08-17 | SA_REP     |  7000.00 |           0.25 |        146 |            80 |
|         162 | Clara       | Vishney     | CVISHNEY | 011.44.1346.129268 | 1987-08-18 | SA_REP     | 10500.00 |           0.25 |        147 |            80 |
|         163 | Danielle    | Greene      | DGREENE  | 011.44.1346.229268 | 1987-08-19 | SA_REP     |  9500.00 |           0.15 |        147 |            80 |
|         164 | Mattea      | Marvins     | MMARVINS | 011.44.1346.329268 | 1987-08-20 | SA_REP     |  7200.00 |           0.10 |        147 |            80 |
|         165 | David       | Lee         | DLEE     | 011.44.1346.529268 | 1987-08-21 | SA_REP     |  6800.00 |           0.10 |        147 |            80 |
|         166 | Sundar      | Ande        | SANDE    | 011.44.1346.629268 | 1987-08-22 | SA_REP     |  6400.00 |           0.10 |        147 |            80 |
|         167 | Amit        | Banda       | ABANDA   | 011.44.1346.729268 | 1987-08-23 | SA_REP     |  6200.00 |           0.10 |        147 |            80 |
|         168 | Lisa        | Ozer        | LOZER    | 011.44.1343.929268 | 1987-08-24 | SA_REP     | 11500.00 |           0.25 |        148 |            80 |
|         169 | Harrison    | Bloom       | HBLOOM   | 011.44.1343.829268 | 1987-08-25 | SA_REP     | 10000.00 |           0.20 |        148 |            80 |
|         170 | Tayler      | Fox         | TFOX     | 011.44.1343.729268 | 1987-08-26 | SA_REP     |  9600.00 |           0.20 |        148 |            80 |
|         171 | William     | Smith       | WSMITH   | 011.44.1343.629268 | 1987-08-27 | SA_REP     |  7400.00 |           0.15 |        148 |            80 |
|         172 | Elizabeth   | Bates       | EBATES   | 011.44.1343.529268 | 1987-08-28 | SA_REP     |  7300.00 |           0.15 |        148 |            80 |
|         173 | Sundita     | Kumar       | SKUMAR   | 011.44.1343.329268 | 1987-08-29 | SA_REP     |  6100.00 |           0.10 |        148 |            80 |
|         174 | Ellen       | Abel        | EABEL    | 011.44.1644.429267 | 1987-08-30 | SA_REP     | 11000.00 |           0.30 |        149 |            80 |
|         175 | Alyssa      | Hutton      | AHUTTON  | 011.44.1644.429266 | 1987-08-31 | SA_REP     |  8800.00 |           0.25 |        149 |            80 |
|         176 | Jonathon    | Taylor      | JTAYLOR  | 011.44.1644.429265 | 1987-09-01 | SA_REP     |  8600.00 |           0.20 |        149 |            80 |
|         177 | Jack        | Livingston  | JLIVINGS | 011.44.1644.429264 | 1987-09-02 | SA_REP     |  8400.00 |           0.20 |        149 |            80 |
|         178 | Kimberely   | Grant       | KGRANT   | 011.44.1644.429263 | 1987-09-03 | SA_REP     |  7000.00 |           0.15 |        149 |             0 |
|         179 | Charles     | Johnson     | CJOHNSON | 011.44.1644.429262 | 1987-09-04 | SA_REP     |  6200.00 |           0.10 |        149 |            80 |
|         180 | Winston     | Taylor      | WTAYLOR  | 650.507.9876       | 1987-09-05 | SH_CLERK   |  3200.00 |           0.00 |        120 |            50 |
|         181 | Jean        | Fleaur      | JFLEAUR  | 650.507.9877       | 1987-09-06 | SH_CLERK   |  3100.00 |           0.00 |        120 |            50 |
|         182 | Martha      | Sullivan    | MSULLIVA | 650.507.9878       | 1987-09-07 | SH_CLERK   |  2500.00 |           0.00 |        120 |            50 |
|         183 | Girard      | Geoni       | GGEONI   | 650.507.9879       | 1987-09-08 | SH_CLERK   |  2800.00 |           0.00 |        120 |            50 |
|         184 | Nandita     | Sarchand    | NSARCHAN | 650.509.1876       | 1987-09-09 | SH_CLERK   |  4200.00 |           0.00 |        121 |            50 |
|         185 | Alexis      | Bull        | ABULL    | 650.509.2876       | 1987-09-10 | SH_CLERK   |  4100.00 |           0.00 |        121 |            50 |
|         186 | Julia       | Dellinger   | JDELLING | 650.509.3876       | 1987-09-11 | SH_CLERK   |  3400.00 |           0.00 |        121 |            50 |
|         187 | Anthony     | Cabrio      | ACABRIO  | 650.509.4876       | 1987-09-12 | SH_CLERK   |  3000.00 |           0.00 |        121 |            50 |
|         188 | Kelly       | Chung       | KCHUNG   | 650.505.1876       | 1987-09-13 | SH_CLERK   |  3800.00 |           0.00 |        122 |            50 |
|         189 | Jennifer    | Dilly       | JDILLY   | 650.505.2876       | 1987-09-14 | SH_CLERK   |  3600.00 |           0.00 |        122 |            50 |
|         190 | Timothy     | Gates       | TGATES   | 650.505.3876       | 1987-09-15 | SH_CLERK   |  2900.00 |           0.00 |        122 |            50 |
|         191 | Randall     | Perkins     | RPERKINS | 650.505.4876       | 1987-09-16 | SH_CLERK   |  2500.00 |           0.00 |        122 |            50 |
|         192 | Sarah       | Bell        | SBELL    | 650.501.1876       | 1987-09-17 | SH_CLERK   |  4000.00 |           0.00 |        123 |            50 |
|         193 | Britney     | Everett     | BEVERETT | 650.501.2876       | 1987-09-18 | SH_CLERK   |  3900.00 |           0.00 |        123 |            50 |
|         194 | Samuel      | McCain      | SMCCAIN  | 650.501.3876       | 1987-09-19 | SH_CLERK   |  3200.00 |           0.00 |        123 |            50 |
|         195 | Vance       | Jones       | VJONES   | 650.501.4876       | 1987-09-20 | SH_CLERK   |  2800.00 |           0.00 |        123 |            50 |
|         196 | Alana       | Walsh       | AWALSH   | 650.507.9811       | 1987-09-21 | SH_CLERK   |  3100.00 |           0.00 |        124 |            50 |
|         197 | Kevin       | Feeney      | KFEENEY  | 650.507.9822       | 1987-09-22 | SH_CLERK   |  3000.00 |           0.00 |        124 |            50 |
|         198 | Donald      | OConnell    | DOCONNEL | 650.507.9833       | 1987-09-23 | SH_CLERK   |  2600.00 |           0.00 |        124 |            50 |
|         199 | Douglas     | Grant       | DGRANT   | 650.507.9844       | 1987-09-24 | SH_CLERK   |  2600.00 |           0.00 |        124 |            50 |
|         200 | Jennifer    | Whalen      | JWHALEN  | 515.123.4444       | 1987-09-25 | AD_ASST    |  4400.00 |           0.00 |        101 |            10 |
|         201 | Michael     | Hartstein   | MHARTSTE | 515.123.5555       | 1987-09-26 | MK_MAN     | 13000.00 |           0.00 |        100 |            20 |
|         202 | Pat         | Fay         | PFAY     | 603.123.6666       | 1987-09-27 | MK_REP     |  6000.00 |           0.00 |        201 |            20 |
|         203 | Susan       | Mavris      | SMAVRIS  | 515.123.7777       | 1987-09-28 | HR_REP     |  6500.00 |           0.00 |        101 |            40 |
|         204 | Hermann     | Baer        | HBAER    | 515.123.8888       | 1987-09-29 | PR_REP     | 10000.00 |           0.00 |        101 |            70 |
|         205 | Shelley     | Higgins     | SHIGGINS | 515.123.8080       | 1987-09-30 | AC_MGR     | 12000.00 |           0.00 |        101 |           110 |
|         206 | William     | Gietz       | WGIETZ   | 515.123.8181       | 1987-10-01 | AC_ACCOUNT |  8300.00 |           0.00 |        205 |           110 |
+-------------+-------------+-------------+----------+--------------------+------------+------------+----------+----------------+------------+---------------+

Sample table : departments

+---------------+----------------------+------------+-------------+
| DEPARTMENT_ID | DEPARTMENT_NAME      | MANAGER_ID | LOCATION_ID |
+---------------+----------------------+------------+-------------+
|            10 | Administration       |        200 |        1700 |
|            20 | Marketing            |        201 |        1800 |
|            30 | Purchasing           |        114 |        1700 |
|            40 | Human Resources      |        203 |        2400 |
|            50 | Shipping             |        121 |        1500 |
|            60 | IT                   |        103 |        1400 |
|            70 | Public Relations     |        204 |        2700 |
|            80 | Sales                |        145 |        2500 |
|            90 | Executive            |        100 |        1700 |
|           100 | Finance              |        108 |        1700 |
|           110 | Accounting           |        205 |        1700 |
|           120 | Treasury             |          0 |        1700 |
|           130 | Corporate Tax        |          0 |        1700 |
|           140 | Control And Credit   |          0 |        1700 |
|           150 | Shareholder Services |          0 |        1700 |
|           160 | Benefits             |          0 |        1700 |
|           170 | Manufacturing        |          0 |        1700 |
|           180 | Construction         |          0 |        1700 |
|           190 | Contracting          |          0 |        1700 |
|           200 | Operations           |          0 |        1700 |
|           210 | IT Support           |          0 |        1700 |
|           220 | NOC                  |          0 |        1700 |
|           230 | IT Helpdesk          |          0 |        1700 |
|           240 | Government Sales     |          0 |        1700 |
|           250 | Retail Sales         |          0 |        1700 |
|           260 | Recruiting           |          0 |        1700 |
|           270 | Payroll              |          0 |        1700 |
+---------------+----------------------+------------+-------------+

SQLite Code:

-- Selecting the first name, last name, and salary of employees
SELECT first_name, last_name, salary 
-- Specifying the table from which to retrieve the data, in this case, "employees"
FROM employees
-- Filtering the results to include only rows where the department_id is in a subquery result
WHERE department_id IN 
  -- Subquery to retrieve the department_id values for departments with names starting with 'IT'
  (SELECT department_id
   FROM departments
   WHERE depart_name LIKE 'IT%' )
-- Further filtering the results to include only rows where the salary is greater than the average salary
AND salary >
  -- Subquery to retrieve the average salary from the same "employees" table
  (SELECT avg(salary)
   FROM employees );

Output:

first_name  last_name   salary
----------  ----------  ----------
Alexander   Hunold      9000

Explanation:

The above SQLite query selects the first name, last name, and salary of employees from the "employees" table, including only those employees who meet two conditions: they belong to departments with names starting with 'IT', and their individual salary is greater than the average salary of all employees.

Here's a brief explanation of each part of SQLite code:

  • SELECT clause:
    • It selects the "first_name," "last_name," and "salary" columns.
  • FROM clause:
    • Specifies the table from which to retrieve the data, in this case, the "employees" table.
  • WHERE clause:
    • Filters the results to include only rows that satisfy two conditions:
      • The "department_id" is in the list of department_id values obtained from a subquery.
      • The "salary" is greater than the average salary calculated using another subquery.
  • Subquery 1:
    • The first subquery (SELECT department_id FROM departments WHERE depart_name LIKE 'IT%') retrieves the "department_id" values for departments with names starting with 'IT'. This subquery is used to filter employees based on their department.
  • Subquery 2:
    • The second subquery (SELECT avg(salary) FROM employees) calculates the average salary from the same "employees" table. This subquery is used to filter employees based on their individual salary being greater than the average.

Practice SQLite Online


Model Database

Employee Model  Database - w3resource online SQLite practice

Structure of 'hr' database :

hr database

Improve this sample solution and post your code through Disqus.

Previous: Write a query to find the names (first_name, last_name), the salary of the employees whose salary is equal to the minimum salary for their job grade.
Next: Write a query to find the names (first_name, last_name), the salary of the employees who earn more than Mr. Bell.

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