Provider: MySQLAB Web page:

Size: px

Start display at page:

Download "Provider: MySQLAB Web page:"

James Warren
5 years ago
Views:

3.5-win.zip and execute setup.exe program.

Target directory should be mysql. Unzip mysql++-.

1 Provider: MySQLAB Web page: Installation of MySQL. Installation of MySQL. Download the mysql win.zip and mysql win3-vc++.zip files from the mysql.com site. Unzip mysql win.zip and execute setup.exe program. Installation of MySQL 3. Installation of MySQL 4. Target directory should be mysql. Unzip mysql win3-vc++.zip. Target directory should be mysql.

Starting MySQL server WinMySQLadmin Start program WinMySQLadmin The green semafor shows that the MySQL server is runing. Relational database Structured Query Language 00 00 ger0 00 00 00-05-4.

$C:\Documents and Settings\User>cd \mysql\bin C:\mysql\bin>mysql Welcome to the MySQL monitor. Commands with ; or \g. Your MySQL connection id is 5 to server version: 3.$

2 Starting MySQL server WinMySQLadmin Start program WinMySQLadmin The green semafor shows that the MySQL server is runing. Relational database Structured Query Language ger Standard for managing relational databases ger0 Relation lessons eng0 Mon 0:00:00 Mon 0:00:00 :00:00 Tues 0:00:00 ger0 Tues 0:00:00 :00:00 ger0 Mon 0:00:00 :00: School lessons 00 ger eng0 004 ger0 005 eng eng0 003 ger0 ger Microsoft Windows XP [verziószám: ] (C) Copyright Microsoft Corp. C:\Documents and Settings\User>cd \mysql\bin C:\mysql\bin>mysql Welcome to the MySQL monitor. Commands with ; or \g. Your MySQL connection id is 5 to server version: nt Type 'help;' or '\h' for help. Type '\c' to clear the buffer. mysql> MySQL: command window eng0 Mon 0:00:00 Mon 0:00:00 :00:00 ger0 ger0 Tues Tues Mon 0:00:00 0:00:00 0:00:00 :00:00 :00:00 Opening a command window one can use MySQL as a stand-alone utility and execute the SQL commands directly.

3 Commands of MySQL: Help mysql> \h MySQL commands: Note that all text commands must be first on line and with ';' Help (\h) Display this help.? (\?) Synonym for `help'. Clear (\c) Clear command. connect (\r) Reconnect to the server. Optional arguments are db and host. Ego (\G) S command to mysql server, display result vertically. Exit (\q) Exit mysql. Same as quit. Go (\g) S command to mysql server. Note (\t) Don't write into outfile. Print (\p) Print current command. Quit (\q) Quit mysql. Rehash (\#) Rebuild completion hash. Source (\.) Execute a SQL script file. Takes a file name as an argument. Status (\s) Get status information from the server. Tee (\T) Set outfile [to_outfile]. App everything into given outfile. Use (\u) Use another database. Takes database name as argument.. Connection id: 5 (Can be used with mysqladmin kill) CREATE DATABASE Syntax: CREATE DATABASE db_name ; Example: mysql> create database iskola; Query OK, row affected (0.00 sec) mysql> Syntax: USE tbl_name ; Example: Using database: USE mysql> use iskola; Database changed mysql> FKDU(size): YDUFKDU(size):,QW(size): 'DWH: 7LPH: Basic types Fix, size long string, max: 55 length String with variable(max size) length. integer Date in form yyyy-mm-dd Time in form hh:mm:ss VARCHAR DATE TIME 08:30:00 CREATE TABLE - ; CREATE TABLE - ; CREATE TABLE ( int(4) MARY KEY NOT, VARCHAR(0), VARCHAR(0)); CREATE TABLE ( INT(4) NOT, CHAR(4) NOT, DATE, MARY KEY(,) ); mysql> CREATE TABLE -> ( int(4) MARY KEY NOT, -> VARCHAR(0), -> VARCHAR(0)); Query OK, 0 rows affected (0.05 sec) mysql> CREATE TABLE -> ( INT(4) NOT, -> CHAR(4) not null, -> DATE, -> MARY KEY(,) ); Query OK, 0 rows affected (0.0 sec) 3

4 CREATE TABLE - lessons; DESCRIBE ; Field Type int(4) varchar(0) varchar(0) Null Key Default 0 Extra CREATE TABLE lessons ( char(5) MARY KEY NOT, CHAR(0) NOT, INT(), VARCHAR(9), TIME, TIME); mysql> CREATE TABLE lessons ( char(5) MARY KEY NOT, CHAR(0) NOT, INT(), VARCHAR(9), TIME, TIME); Query OK, 0 rows affected (0.0 sec) CREATE TABLE ( int(4) MARY KEY NOT, VARCHAR(0), VARCHAR(0)); DESCRIBE ; DESCRIBE lessons; Field Type int(4) char(4) Null Key Default 0 Extra Field Type varchar(5) varchar(0) int() varchar(9) time time Null Key Default 0 Extra CREATE TABLE ( INT(4) NOT, CHAR(4) NOT, DATE, MARY KEY(,) ); CREATE TABLE lessons ( char(5) MARY KEY NOT, CHAR(0) NOT, INT(), VARCHAR(9), TIME, TIME); Changing the structure of a table: ALTER Field Type int(4) Null Key Default 0 Extra ALTER [IGNORE] TABLE táblanév alter_spec [,colnév...] varchar(0) varchar(0) alter_spec: ADD [COLUMN] col_def [FIRST AFTER col_name ] or ADD [COLUMN] (col_def, col_def,...) or CHANGE [COLUMN] old_col_name col_def or MODIFY [COLUMN] col_def or DROP [COLUMN] col_name or DROP MARY KEY or RENAME [TO] new_tbl_name or ORDER BY col col def: col_name type [clause] ALTER TABLE CHANGE VARCHAR(5) NOT ; Field Type int(4) varchar(5) varchar(0) Null Key Default 0 Extra mysql> alter table change varchar(5) not null; Query OK, 0 rows affected (0.0 sec) Records: 0 Duplicates: 0 Warnings: 0 4

5 Inserting new row : INSERT Inserting new row : INSERT INSERT INTO VALUES (00,, ); 00 INSERT INTO VALUES (00,, ); INSERT INTO VALUES (00,, ); mysql> INSERT INTO -> VALUES (00,'',''); Query OK, row affected (0.0 sec) mysql> INSERT INTO -> VALUES (00,'',''); Query OK, row affected (0.0 sec) INSERT - lessons; INSERT - ; eng0 Mon 0:00:00 00 ger0 INSERT INTO lessons VALUES ( eng0,,, Tues,, 0:00:00 ); INSERT INTO VALUES (00, ger0, ); mysql> insert into lessons VALUES('ger0','',,'Mon','','0:00:00'); Query OK, row affected (0.00 sec) mysql> INSERT INTO VALUES (00,'ger0',''); Query OK, row affected (0.00 sec) Up - example Delete - example eng0 Mon 0:00:00 Mon 0:00:00 :00:00 eng0 Mon 0:00:00 Tues 0:00:00 Mon 0:00:00 :00:00 ger0 Tues 0:00:00 :00:00 Tues 0:00:00 ger0 Mon 0:00:00 :00:00 ger0 Tues 0:00:00 :00:00 ger0 Mon 0:00:00 :00:00 UPDATE lessons SET =, = 0:00:00, = Wednes WHERE = Mon AND = 0:00:00 ; DELETE FROM lessons WHERE = AND =; eng0 Mon Wednes Tues 0:00:00 0:00:00 0:00:00 eng0 Mon Mon 0:00:00 0:00:00 :00:00 ger0 Tues 0:00:00 :00:00 Tues 0:00:00 ger0 Wednes 0:00:00 ger0 Tues 0:00:00 :00:00 5

eng0 ger0 ger0 Without where each data will be deleted. NO PROMPT!

0:00:00 :00:00 :00:00 DELETE FROM lessons; Deleting a table: DROP TABLE DROP

!! 3 4 5 6 7 8 9 0 00 00 003 004 005 006 00 00 003 SELECT * FROM ; 3 4 00 00 003

00-05-4 004 ger0 005 eng0 SELECT, FROM WHERE LIKE '%0'; 00 00 003 ger0 eng0

6 eng0 ger0 ger0 Without where each data will be deleted. NO PROMPT!!! Delete - example Mon Mon Tues Tues Mon 0:00:00 0:00:00 0:00:00 0:00:00 :00:00 0:00:00 :00:00 :00:00 DELETE FROM lessons; Deleting a table: DROP TABLE DROP TABLE tbl_name;! NO PROMPT!!! SELECT * FROM ; SELECT, FROM WHERE =""; ger eng ger0 005 eng0 SELECT, FROM WHERE LIKE '%0'; ger0 eng0 Advanced query - example SELECT FROM ; ger eng0 ger0 ger eng0 eng0 ger ger0 6

Advanced query - example 00 00 003 004 005 006 00 00 003 ger0 eng0 ger0 eng0 eng0 ger0 ger0 00-05-4 00-05-4 00-05-4 00-05-4 SELECT DISTINCT FROM ; last_n 00 ame 00 003 004 005 006 00 00 003 Advanced

7 Advanced query - example ger0 eng0 ger0 eng0 eng0 ger0 ger SELECT DISTINCT FROM ; last_n 00 ame Advanced query - example first_na me SELECT COUNT(*) FROM ; Advanced query - example Aggregate functions eng0 ger0 ger SELECT AVG () FROM ; MIN MAX SUM AVG COUNT COUNT(*) Smallest value of the column Greatest value of the column Sum of the column Average of the column Number of rows in the column Number of rows in the table Mathematical operations - functions +, -, *, /, % abs(x) sign(x) mod(x,y) power(x,y) Absolute value of x -, 0, or deping on the sign (negativ, zero, pozitiv) Same as x%y x y round(x) X rounded on integer round(x,d) X rounded on d decimal number sqrt(x) Sqrt of x GROUP BY - Example 00 ger eng ger0 005 eng eng0 003 ger ger0 SELECT, COUNT() FROM GROUP BY ; The group by clause will gather all of the rows together that contain data in the specified column(s) and will allow aggregate functions to be performed on the one or more columns. 7

Having - Example SELECT, COUNT() FROM GROUP BY HAVING COUNT() > 3; Order by - Example 00 last_n ame first_na me SELECT,, FROM WHERE <>"" ORDER BY, ; 00 00 003 004 005 006 00 00 003 ger0 eng0 ger0

should be selected will be based on the conditions you specify.

- Példa 00 last_n ame first_na me 00 SELECT, FROM WHERE IN ("",""); Between - példa 00 last_n ame first_na me 00 SELECT,, FROM WHERE BETWEEN 003 AND 00 ORDER BY ; 003 003 004 004 005 005 006 006 00

8 Having - Example SELECT, COUNT() FROM GROUP BY HAVING COUNT() > 3; Order by - Example 00 last_n ame first_na me SELECT,, FROM WHERE <>"" ORDER BY, ; ger0 eng0 ger0 eng0 eng0 ger ger0 The having clause allows you to specify conditions on the rows for each group - in other words, which rows should be selected will be based on the conditions you specify. order by is an optional clause which will allow you to display the results of your query in a sorted order (either ascing order or descing order) based on the columns that you specify to order by In - Példa 00 last_n ame first_na me 00 SELECT, FROM WHERE IN ("",""); Between - példa 00 last_n ame first_na me 00 SELECT,, FROM WHERE BETWEEN 003 AND 00 ORDER BY ; The in conditional operator is really a set membership test operator. That is, it is used to test whether or not a value (stated before the keyword in) is "in" the list of values provided after the keyword in. The between conditional operator is used to test to see whether or not a value (stated before the keyword between) is "between" the two values stated after the keyword between. eng0 ger0 ger Table joins: JOIN SELECT., FROM, ; ger0 eng0 ger0 eng0 eng0 ger0 ger SELECT * FROM,; 00 ger eng eng0 004 ger0 005 eng eng0 003 ger ger0 8

9 9 ger ger0 003 eng eng0 005 ger eng ger0 00 SELECT * FROM,; eng ger ger0 003 eng eng0 005 ger eng ger0 00 ger ger0 003 eng eng0 005 ger eng ger0 00 SELECT * FROM,; eng ger0 ger0 ger ger0 003 eng eng0 005 ger eng ger0 00 ger ger0 003 eng eng0 005 ger eng ger0 00 ger ger0 003 eng eng0 005 ger eng ger0 00 ger ger0 003 eng eng0 005 ger eng ger0 00 ger ger0 003 eng eng0 005 ger eng ger0 00 ger ger0 003 eng eng0 005 ger eng ger0 00 SELECT * FROM, WHERE.=.; 0000 ger0 ger0 eng0 ger ger0 003 eng eng0 005 ger eng ger0 00 SELECT * FROM, WHERE.=.; 0000 ger0 ger0 eng0 ger ger0 003 eng eng0 005 ger eng ger0 00 ger ger0 003 eng eng0 005 ger eng ger0 00 ger ger0 003 eng eng0 005 ger eng ger0 00 SELECT * FROM, WHERE.=.; 0000 ger0 ger0 eng0 ger ger0 003 eng eng0 005 ger eng ger0 00 ger ger0 003 eng eng0 005 ger eng ger0 00 ger ger0 003 eng eng0 005 ger eng ger0 00 SELECT * FROM, WHERE.=.; ger0 ger0 ger ger0 003 ger0 ger0 004 ger0 ger0 00 eng0 eng0 00 eng0 eng0 005 eng eng0 003

10 0 SELECT., FROM,, WHERE.=.; ger0 ger0 ger0 ger0 eng0 eng0 eng0 ger ger0 003 eng eng0 005 ger eng ger0 00 ger0 ger eng0 SELECT., SUM() FROM,, WHERE.=. GROUP BY ; ger0 eng0 sum() ger ger0 003 eng eng0 005 ger eng ger0 00 ger0 ger eng0

Using MySQL on the Winthrop Linux Systems

Using MySQL on the Winthrop Linux Systems by Dr. Kent Foster adapted for CSCI 297 Scripting Languages by Dr. Dannelly updated March 2017 I. Creating your MySQL password: Your mysql account username has