SQL/MySQL/String/String Compare

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Compare String in where clause

   <source lang="sql">

/* mysql> select * from employee_person; +----+-------------------------------------+---------+---------------------------+------------+------+----------+-----------------+----------+ | id | address | phone | email | birthday | sex | m_status | s_name | children | +----+-------------------------------------+---------+---------------------------+------------+------+----------+-----------------+----------+ | 1 | 200, Regina Street | 7176666 | net@hotmail.ru | 1971-04-26 | M | Y | Ane Regina | NULL | | 2 | 1232 Alberta Road | 5553312 | jo@hotmail.ru | 1968-03-02 | M | Y | Jane Van | 3 | | 3 | 90 Potter A | 3331211 | gp@ymail.ru | 1967-09-22 | M | N | Sandhya Pil | 2 | | 4 | 202, Donna Street | 7176167 | twink@hotmail.ru | 1976-08-09 | F | Y | Manish Sha | NULL | | 5 | Apartment #8, UBC, Van Street | 8973242 | holy@ymail.ru | 1974-10-14 | F | N | NULL | NULL | | 6 | 46 SFU Street | 6451234 | kill@el.ru | 1978-12-31 | M | N | NULL | NULL | | 7 | 432 Mercury Ave | 7932232 | mac@hotmail.ru | 1966-08-21 | M | Y | Mary Shelly | 3 | | 8 | 8 Little YaleTown | 5442994 | edd@gmail.ru | 1975-01-14 | M | N | NULL | NULL | | 9 | 64 Temp Road | 4327652 | nan@pmail.ru | 1969-05-19 | M | Y | Man Nanda | 1 | | 10 | 132 Metro House, Henry Street | 5552376 | ra@hotmail.ru | 1968-07-06 | M | N | NULL | NULL | | 11 | 1 Grace Town, Van Avenue | 5433879 | soundofsilence@boxer.net | 1957-11-04 | M | Y | Muriel Lovelace | 4 | | 12 | 97 Oakland Road | 5423311 | kingarthur@roundtable.org | 1968-02-15 | M | Y | Rina Brighton | 3 | | 13 | 543 Applegate Lane | 3434343 | levy@cmail.ru | 1968-09-03 | F | Y | Matt Shi | 2 | | 14 | 76 Fish Street | 7432433 | tink@email.ru | 1965-04-28 | M | N | NULL | NULL | | 15 | 98 Gun Street | 6500787 | danny@fhardy.ru | 1966-06-23 | M | Y | Betty Cudly | 3 | | 16 | #5 Winnepag Homes | 5433243 | mike@cmail.ru | 1964-03-06 | M | Y | Stella Stevens | 2 | | 17 | 652 Devon Building, 6th Jade Avenue | 5537885 | mona@darling.ru | 1970-04-18 | F | Y | Edgar Alan | 1 | | 18 | Apartment #9, Together Towers | 5476565 | odessey@hotmail.ru | 1973-10-09 | M | N | NULL | NULL | | 19 | Apartment #9, West Towers | 5476565 | jire@hotmail.ru | 1973-01-20 | M | N | NULL | NULL | | 20 | 90 Yale Town | 7528326 | help@more.org | 1968-01-25 | F | N | NULL | NULL | | 21 | 4329 Eucalyptus Avenue | 4254863 | money@cold.ru | 1964-06-13 | M | Y | Ruby Richer | 2 | +----+-------------------------------------+---------+---------------------------+------------+------+----------+-----------------+----------+ 21 rows in set (0.00 sec) mysql> update employee SET

   ->        title = "Web Developer"
   ->        WHERE title = "Web Designer";

Query OK, 2 rows affected (0.00 sec) Rows matched: 2 Changed: 2 Warnings: 0 mysql> select * from employee_person; +----+-------------------------------------+---------+---------------------------+------------+------+----------+-----------------+----------+ | id | address | phone | email | birthday | sex | m_status | s_name | children | +----+-------------------------------------+---------+---------------------------+------------+------+----------+-----------------+----------+ | 1 | 200, Regina Street | 7176666 | net@hotmail.ru | 1971-04-26 | M | Y | Ane Regina | NULL | | 2 | 1232 Alberta Road | 5553312 | jo@hotmail.ru | 1968-03-02 | M | Y | Jane Van | 3 | | 3 | 90 Potter A | 3331211 | gp@ymail.ru | 1967-09-22 | M | N | Sandhya Pil | 2 | | 4 | 202, Donna Street | 7176167 | twink@hotmail.ru | 1976-08-09 | F | Y | Manish Sha | NULL | | 5 | Apartment #8, UBC, Van Street | 8973242 | holy@ymail.ru | 1974-10-14 | F | N | NULL | NULL | | 6 | 46 SFU Street | 6451234 | kill@el.ru | 1978-12-31 | M | N | NULL | NULL | | 7 | 432 Mercury Ave | 7932232 | mac@hotmail.ru | 1966-08-21 | M | Y | Mary Shelly | 3 | | 8 | 8 Little YaleTown | 5442994 | edd@gmail.ru | 1975-01-14 | M | N | NULL | NULL | | 9 | 64 Temp Road | 4327652 | nan@pmail.ru | 1969-05-19 | M | Y | Man Nanda | 1 | | 10 | 132 Metro House, Henry Street | 5552376 | ra@hotmail.ru | 1968-07-06 | M | N | NULL | NULL | | 11 | 1 Grace Town, Van Avenue | 5433879 | soundofsilence@boxer.net | 1957-11-04 | M | Y | Muriel Lovelace | 4 | | 12 | 97 Oakland Road | 5423311 | kingarthur@roundtable.org | 1968-02-15 | M | Y | Rina Brighton | 3 | | 13 | 543 Applegate Lane | 3434343 | levy@cmail.ru | 1968-09-03 | F | Y | Matt Shi | 2 | | 14 | 76 Fish Street | 7432433 | tink@email.ru | 1965-04-28 | M | N | NULL | NULL | | 15 | 98 Gun Street | 6500787 | danny@fhardy.ru | 1966-06-23 | M | Y | Betty Cudly | 3 | | 16 | #5 Winnepag Homes | 5433243 | mike@cmail.ru | 1964-03-06 | M | Y | Stella Stevens | 2 | | 17 | 652 Devon Building, 6th Jade Avenue | 5537885 | mona@darling.ru | 1970-04-18 | F | Y | Edgar Alan | 1 | | 18 | Apartment #9, Together Towers | 5476565 | odessey@hotmail.ru | 1973-10-09 | M | N | NULL | NULL | | 19 | Apartment #9, West Towers | 5476565 | jire@hotmail.ru | 1973-01-20 | M | N | NULL | NULL | | 20 | 90 Yale Town | 7528326 | help@more.org | 1968-01-25 | F | N | NULL | NULL | | 21 | 4329 Eucalyptus Avenue | 4254863 | money@cold.ru | 1964-06-13 | M | Y | Ruby Richer | 2 | +----+-------------------------------------+---------+---------------------------+------------+------+----------+-----------------+----------+ 21 rows 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, email) values ("John", "Chen", "Senior Programmer", 31, 3, 120000, 25000, "j@hotmail.ru"); INSERT INTO employee (firstname, lastName, title, age, yearofservice, salary, perks, email) values ("Jan", "Pillai", "Senior Programmer", 32, 4, 110000, 20000, "g@yahoo.ru"); INSERT INTO employee (firstname, lastName, title, age, yearofservice, salary, perks, email) values ("Ane", "Pandit", "Web Designer", 24, 3, 90000, 15000, "a@gmail.ru"); INSERT INTO employee (firstname, lastName, title, age, yearofservice, salary, perks, email) values ("Mary", "Anchor", "Web Designer", 27, 2, 85000, 15000, "m@mail.ru"); INSERT INTO employee (firstname, lastName, title, age, yearofservice, salary, perks, email) values ("Fred", "King", "Programmer", 32, 3, 75000, 15000, "f@net.ru"); INSERT INTO employee (firstname, lastName, title, age, yearofservice, salary, perks, email) values ("John", "Mac", "Programmer", 32, 4, 80000, 16000, "j@hotmail.ru"); INSERT INTO employee (firstname, lastName, title, age, yearofservice, salary, perks, email) values ("Arthur", "Sam", "Programmer", 28, 2, 75000, 14000, "e@yahoo.ru"); INSERT INTO employee (firstname, lastName, title, age, yearofservice, salary, perks, email) values ("Alok", "Nanda", "Programmer", 32, 3, 70000, 10000, "a@yahoo.ru"); INSERT INTO employee (firstname, lastName, title, age, yearofservice, salary, perks, email) values ("Susan", "Ra", "Multimedia Programmer", 32, 4, 90000, 15000, "h@gmail.ru"); INSERT INTO employee (firstname, lastName, title, age, yearofservice, salary, perks, email) values ("Paul", "Simon", "Multimedia Programmer", 23, 1, 85000, 12000, "ps@gmail.ru"); INSERT INTO employee (firstname, lastName, title, age, yearofservice, salary, perks, email) values ("Edward", "Parhar", "Multimedia Programmer", 30, 2, 75000, 15000, "a@hotmail.ru"); INSERT INTO employee (firstname, lastName, title, age, yearofservice, salary, perks, email) values ("Kim", "Hunter", "Senior Web Designer", 32, 4, 110000, 20000, "kim@coolmail.ru"); INSERT INTO employee (firstname, lastName, title, age, yearofservice, salary, perks, email) values ("Roger", "Lewis", "System Administrator", 32, 3, 100000, 13000, "roger@mail.ru"); INSERT INTO employee (firstname, lastName, title, age, yearofservice, salary, perks, email) values ("Danny", "Gibson", "System Administrator", 31, 2, 90000, 12000, "danny@hotmail.ru"); INSERT INTO employee (firstname, lastName, title, age, yearofservice, salary, perks, email) values ("Mike", "Harper", "Senior Marketing Executive", 36, 1, 120000, 28000, "m@gmail.ru"); INSERT INTO employee (firstname, lastName, title, age, yearofservice, salary, perks, email) values ("Mary", "Sunday", "Marketing Executive", 31, 5, 90000, 25000, "monica@bigmail.ru"); INSERT INTO employee (firstname, lastName, title, age, yearofservice, salary, perks, email) values ("Jack", "Sim", "Marketing Executive", 27, 1, 70000, 18000, "hal@gmail.ru"); INSERT INTO employee (firstname, lastName, title, age, yearofservice, salary, perks, email) values ("Joe", "Irvine", "Marketing Executive", 27, 1, 72000, 18000, "joseph@hotmail.ru"); INSERT INTO employee (firstname, lastName, title, age, yearofservice, salary, perks, email) values ("Henry", "Ali", "Customer Service Manager", 32, 3, 70000, 9000, "shahida@hotmail.ru"); INSERT INTO employee (firstname, lastName, title, age, yearofservice, salary, perks, email) values ("Peter", "Champion", "Finance Manager", 32, 2, 120000, 25000, "peter@yahoo.ru"); select * from employee_person;

update employee SET

      title = "Web Developer"
      WHERE title = "Web Designer";
      

select * from employee_person;

      </source>