Use COUNT with condition : Count « Select Clause « SQL / MySQL

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SQL / MySQL » Select Clause » Count 
Use COUNT with condition

/*mysql> select * from employee;
+----+-----------+----------+----------------------------+------+---------------+--------+-------+---------------------+
| id | firstname | lastname | title                      | age  | yearofservice| salary | perks | email               |
+----+-----------+----------+----------------------------+------+---------------+--------+-------+---------------------+
|  1 | John      | Chen     | Senior Programmer          |   31 |             3| 120000 | 25000 | j@hotmail.com       |
|  2 | Jan       | Pillai   | Senior Programmer          |   32 |             4| 110000 | 20000 | g@yahoo.com         |
|  3 | Ane       | Pandit   | Web Designer               |   24 |             3|  90000 | 15000 | a@gmail.com         |
|  4 | Mary      | Anchor   | Web Designer               |   27 |             2|  85000 | 15000 | m@mail.com          |
|  5 | Fred      | King     | Programmer                 |   32 |             3|  75000 | 15000 | f@net.com           |
|  6 | John      | Mac      | Programmer                 |   32 |             4|  80000 | 16000 | j@hotmail.com       |
|  7 | Arthur    | Sam      | Programmer                 |   28 |             2|  75000 | 14000 | e@yahoo.com         |
|  8 | Alok      | Nanda    | Programmer                 |   32 |             3|  70000 | 10000 | a@yahoo.com         |
|  9 | Susan     | Ra       | Multimedia Programmer      |   32 |             4|  90000 | 15000 | h@gmail.com         |
| 10 | Paul      | Simon    | Multimedia Programmer      |   23 |             1|  85000 | 12000 | ps@gmail.com        |
| 11 | Edward    | Parhar   | Multimedia Programmer      |   30 |             2|  75000 | 15000 | a@hotmail.com       |
| 12 | Kim       | Hunter   | Senior Web Designer        |   32 |             4| 110000 | 20000 | kim@coolmail.com    |
| 13 | Roger     | Lewis    | System Administrator       |   32 |             3| 100000 | 13000 | roger@mail.com      |
| 14 | Danny     | Gibson   | System Administrator       |   31 |             2|  90000 | 12000 | danny@hotmail.com   |
| 15 | Mike      | Harper   | Senior Marketing Executive |   36 |             1| 120000 | 28000 | m@gmail.com         |
| 16 | Mary      | Sunday   | Marketing Executive        |   31 |             5|  90000 | 25000 | monica@bigmail.com  |
| 17 | Jack      | Sim      | Marketing Executive        |   27 |             1|  70000 | 18000 | hal@gmail.com       |
| 18 | Joe       | Irvine   | Marketing Executive        |   27 |             1|  72000 | 18000 | joseph@hotmail.com  |
| 19 | Henry     | Ali      | Customer Service Manager   |   32 |             3|  70000 |  9000 | shahida@hotmail.com |
| 20 | Peter     | Champion | Finance Manager            |   32 |             2| 120000 | 25000 | peter@yahoo.com     |
+----+-----------+----------+----------------------------+------+---------------+--------+-------+---------------------+
20 rows in set (0.01 sec)

mysql> select COUNT(*) from employee
    -> where title = 'Programmer';
+----------+
| COUNT(*) |
+----------+
|        4 |
+----------+
1 row in set (0.00 sec)

*/
Drop table employee;

CREATE TABLE employee (
    id int unsigned not null auto_increment primary key,
    firstname varchar(20),
    lastname varchar(20),
    title varchar(30),
    age int,
    yearofservice int,
    salary int,
    perks int,
    email varchar(60)
)



INSERT INTO employee (firstname, lastName, title, age, yearofservice, salary, perks, emailvalues ("John""Chen""Senior Programmer"31312000025000"j@hotmail.com");

INSERT INTO employee (firstname, lastName, title, age, yearofservice, salary, perks, emailvalues ("Jan""Pillai""Senior Programmer"32411000020000"g@yahoo.com");

INSERT INTO employee (firstname, lastName, title, age, yearofservice, salary, perks, emailvalues ("Ane""Pandit""Web Designer"2439000015000"a@gmail.com");

INSERT INTO employee (firstname, lastName, title, age, yearofservice, salary, perks, emailvalues ("Mary""Anchor""Web Designer"2728500015000"m@mail.com");

INSERT INTO employee (firstname, lastName, title, age, yearofservice, salary, perks, emailvalues ("Fred""King""Programmer"3237500015000"f@net.com");
INSERT INTO employee (firstname, lastName, title, age, yearofservice, salary, perks, emailvalues ("John""Mac""Programmer"3248000016000"j@hotmail.com");
INSERT INTO employee (firstname, lastName, title, age, yearofservice, salary, perks, emailvalues ("Arthur""Sam""Programmer"2827500014000"e@yahoo.com");
INSERT INTO employee (firstname, lastName, title, age, yearofservice, salary, perks, emailvalues ("Alok""Nanda""Programmer"3237000010000"a@yahoo.com");
INSERT INTO employee (firstname, lastName, title, age, yearofservice, salary, perks, emailvalues ("Susan""Ra""Multimedia Programmer"3249000015000"h@gmail.com");
INSERT INTO employee (firstname, lastName, title, age, yearofservice, salary, perks, emailvalues ("Paul""Simon""Multimedia Programmer"2318500012000"ps@gmail.com");
INSERT INTO employee (firstname, lastName, title, age, yearofservice, salary, perks, emailvalues ("Edward""Parhar""Multimedia Programmer"3027500015000"a@hotmail.com");
INSERT INTO employee (firstname, lastName, title, age, yearofservice, salary, perks, emailvalues ("Kim""Hunter""Senior Web Designer"32411000020000"kim@coolmail.com");
INSERT INTO employee (firstname, lastName, title, age, yearofservice, salary, perks, emailvalues ("Roger""Lewis""System Administrator"32310000013000"roger@mail.com");
INSERT INTO employee (firstname, lastName, title, age, yearofservice, salary, perks, emailvalues ("Danny""Gibson""System Administrator"3129000012000"danny@hotmail.com");
INSERT INTO employee (firstname, lastName, title, age, yearofservice, salary, perks, emailvalues ("Mike""Harper""Senior Marketing Executive"36112000028000"m@gmail.com");
INSERT INTO employee (firstname, lastName, title, age, yearofservice, salary, perks, emailvalues ("Mary""Sunday""Marketing Executive"3159000025000"monica@bigmail.com");
INSERT INTO employee (firstname, lastName, title, age, yearofservice, salary, perks, emailvalues ("Jack""Sim""Marketing Executive"2717000018000"hal@gmail.com");
INSERT INTO employee (firstname, lastName, title, age, yearofservice, salary, perks, emailvalues ("Joe""Irvine""Marketing Executive"2717200018000"joseph@hotmail.com");
INSERT INTO employee (firstname, lastName, title, age, yearofservice, salary, perks, emailvalues ("Henry""Ali""Customer Service Manager"323700009000"shahida@hotmail.com");
INSERT INTO employee (firstname, lastName, title, age, yearofservice, salary, perks, emailvalues ("Peter""Champion""Finance Manager"32212000025000"peter@yahoo.com");

select from employee;

select COUNT(*from employee
where title = 'Programmer';

           
       
Related examples in the same category
1. Counting Rows: Counting the total number of animals
2. Count and group
3. Use COUNT in select command
4. COUNT() and GROUP BY
5. Another Count and Group BY
6. Count and group by two columns
7. COUNT command with condition
8. COUNT with condition and group
9. Get GROUP BY for COUNT
10. Simple COUNT
11. Performing Row and Column Counting
12. Use COUNT and GROUP
13. Use COUNT, GROUP and HAVING
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