SSE 3200 Mysql lab. Introduction. Getting started

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1 SSE 3200 Mysql lab Introduction SQL (Structured Query Language) is a standard language for creating, accessing, and manipulating databases. A database is a collection of tables. Each table consists of several rows of data called records. Records in a table have special fields called keys to facilitate fast access. Getting started The database server runs on the machine called orion. You will start Mysql on orion. In the commands substitute your account for nilufer. 1. Open a terminal window and log on to orion. ssh orion.csl.mtu.edu 2. Start mysql with your username and have it prompt for a password. [nilufer@orion ]$ mysql -unilufer -p Enter password: Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is Server version: Source distribution Type help; or \h for help. Type \c to clear the buffer. mysql> 3. Display the databases that you have access to. mysql> show databases; Database information_schema airline nilufer rows in set (0.00 sec) 1

2 4. Select your database to work on. mysql> use nilufer; Reading table information for completion of table and column names You can turn off this feature to get a quicker startup with -A Database changed 5. Check to see if the database contains any tables. If there are any delete them using the drop table command. mysql> show tables; Tables_in_nilufer shop row in set (0.00 sec) mysql> drop table shop; Query OK, 0 rows affected (0.00 sec) mysql> show tables; Empty set (0.00 sec) Creating and Accessing Tables 1. Create a table for florists. mysql> create table florists ( -> CompanyId char(3), -> CompanyName char(20), -> Address char(20), -> City char(10), -> Zipcode char(5), -> Phone char(10), -> StartPrice real(6,2), -> primary key(companyid) -> ); Query OK, 0 rows affected (0.00 sec) 2

3 2. Check the properties of the newly created table. mysql> describe florists; Field Type Null Key Default Extra CompanyId char(3) NO PRI CompanyName char(20) YES NULL Address char(20) YES NULL City char(10) YES NULL Zipcode char(5) YES NULL Phone char(10) YES NULL StartPrice double(6,2) YES NULL rows in set (0.00 sec) 3. Insert some records into florists. -> ( KAU, Kukkakauppa, 320 W. Quincy, Hancock, 49930, -> , 9.99); Query OK, 1 row affected (0.00 sec) -> ( BIR, Blue Iris, 403 Shelden Av., Houghton, 49931, -> , 19.99); -> ( CFL, Calumet Floral, 221 Fifth Street, Calumet, 49913, -> , 9.99); -> ( ECO, Econo Foods, 1000 Sharon Avenue, Houghton, 49931, -> , 1.99); -> ( SLE, Flowers by Sleeman, 1201 Memorial Rd., Houghton, 4 -> , 17.99); -> ( KAU, Kukkakauppa, 320 W. Quincy, Hancock, 49930, -> , 9.99); 3

4 -> ( KAT, Kathy\ s Country Flowers, 109 W. Quincy, Hancock, -> , 9.99); 4. Display the records in the table mysql> select * from florists; CompanyId CompanyName Address City Zipcode Phone StartPrice BIR Blue Iris 403 Shelden Av. Houghton CFL Calumet Floral 221 Fifth Street Calumet ECO Econo Foods 1000 Sharon Avenue Houghton SLE Flowers by Sleeman 1201 Memorial Rd. Houghton KAU Kukkakauppa 320 W. Quincy Hancock KAT Kathy s Country Flow 109 W. Quincy Hancock You should not be able to enter records with duplicate keys. -> ( KAU, abc, abc, abc, 12345, , 9.99); ERROR 1062 (23000): Duplicate entry KAU for key 1 4

5 6. Display only two columns. mysql> select address, city from florists; address city Shelden Av. Houghton 221 Fifth Street Calumet 1000 Sharon Avenue Houghton 1201 Memorial Rd. Houghton 320 W. Quincy Hancock 109 W. Quincy Hancock Display only one column. Notice that it will list duplicates. mysql> select city from florists; city Houghton Calumet Houghton Houghton Hancock Hancock 8. Use distinct to eliminate duplicates. mysql> select distinct city from florists; city Houghton Calumet Hancock 3 rows in set (0.00 sec) 5

6 9. Display only the florists in Houghton. mysql> select * from florists where city= Houghton ; CompanyId CompanyName Address City Zipcode Phone StartPrice BIR Blue Iris 403 Shelden Av. Houghton ECO Econo Foods 1000 Sharon Avenue Houghton SLE Flowers by Sleeman 1201 Memorial Rd. Houghton rows in set (0.00 sec) 10. Display those that have a start price of $10.00 or under mysql> select * from florists where StartPrice <= 10; CompanyId CompanyName Address City Zipcode Phone StartPrice BIR Blue Iris 403 Shelden Av. Houghton CFL Calumet Floral 221 Fifth Street Calumet ECO Econo Foods 1000 Sharon Avenue Houghton KAU Kukkakauppa 320 W. Quincy Hancock KAT Kathy s Country Flow 109 W. Quincy Hancock rows in set (0.00 sec) 6

7 11. Try combining conditions using and mysql> select * from florists where -> city= Houghton and StartPrice <= 10; CompanyId CompanyName Address City Zipcode Phone StartPrice BIR Blue Iris 403 Shelden Av. Houghton ECO Econo Foods 1000 Sharon Avenue Houghton rows in set (0.00 sec) 12. Try a condition with between. mysql> select * from florists where StartPrice between 8 and 10; CompanyId CompanyName Address City Zipcode Phone StartPrice BIR Blue Iris 403 Shelden Av. Houghton CFL Calumet Floral 221 Fifth Street Calumet KAU Kukkakauppa 320 W. Quincy Hancock KAT Kathy s Country Flow 109 W. Quincy Hancock rows in set (0.00 sec) 7

8 13. Insert a record and then delete it. -> ( ABC, abc, abc, abc, 12345, , -1); Query OK, 1 row affected (0.00 sec) mysql> select count(*) from florists; count(*) 7 1 row in set (0.00 sec) mysql> delete from florists where StartPrice < 0; uery OK, 1 row affected (0.00 sec) mysql> select count(*) from florists; count(*) 6 1 row in set (0.00 sec) 14. Try ordering the records. mysql> select CompanyName, Phone, StartPrice -> from florists order by StartPrice ASC; CompanyName Phone StartPrice Econo Foods Blue Iris Calumet Floral Kukkakauppa Kathy s Country Flow Flowers by Sleeman rows in set (0.01 sec) 8

9 15. Try updating a record. mysql> select CompanyName, Phone, StartPrice from florists; CompanyName Phone StartPrice Blue Iris Calumet Floral Econo Foods Flowers by Sleeman Kukkakauppa Kathy s Country Flow mysql> update florists -> set Phone = > where CompanyName = Calumet Floral ; Query OK, 0 rows affected (0.01 sec) Rows matched: 1 Changed: 0 Warnings: 0 mysql> select CompanyName, Phone, StartPrice from florists; CompanyName Phone StartPrice Blue Iris Calumet Floral Econo Foods Flowers by Sleeman Kukkakauppa Kathy s Country Flow Next time, we will access the database using Php; mysql> exit; Bye [nilufer@orion ]$ 9

Lab # 1. You will be using MySQL as a database management system during the labs. The goal of this first lab is to familiarize you with MySQL.

Lab # 1. You will be using MySQL as a database management system during the labs. The goal of this first lab is to familiarize you with MySQL. DDB Spring 2006 Lab # 1 You will be using MySQL as a database management system during the labs. The goal of this first lab is to familiarize you with MySQL. The reason you are using MySQL is twofolds.