SQL pepper

Why SQL File I/O is a great deal of code Optimal file organization and indexing is critical and a great deal of code and theory implementation File locking Security concerns Much more

Different SQL Servers Mysql (open source – no cost to use though may cost to embed and resell outside gpl) Ms sql (microsoft ) Oracle Sybase Access Older AS/400 – SQL machine

Structure SQL Server runs a service accepts sql commands using their version of the standard query language Allows access to the data inside the SQL server Organized into databases Tables (like spreadsheets) inside databases Gui management interface – Access / mysql workbench / mssql studio mgr

Your databases Connect with : mysql -u yourdbuser -p yourdatabase – The –p means the password will be entered later. You can also put the password right after the p as in pmypassword. No spaces and no quotes – Your database name is your db user and is usually your ecampus logon name – You should also be able to connect to pepperdb See your tables show tables See information inside your table select * from tablename

Create a table CREATE TABLE table_name (column_name column_type ); Plus insert PRIMARY KEY ( tutorial_id ) at end Ex: create table tutorials_tbl( tutorial_id INT NOT NULL AUTO_INCREMENT, tutorial_title VARCHAR(100) NOT NULL, tutorial_type VARCHAR(40) NOT NULL, submission_date DATE, PRIMARY KEY ( tutorial_id ) ); Credit to :

Create a related table Create table tutorials_types ( type VARCHAR(40) NOT NULL, type_name VARCHAR(100) NOT NULL, type_manager int not null, PRIMARY KEY ( type) ); Table picture from wikipedia

Insert a row INSERT INTO table_name ( field1, field2,...fieldN ) VALUES ( value1, value2,...valueN ); Examples: INSERT INTO tutorials_tbl (tutorial_title, tutorial_type, submission_date) VALUES ("Learn PHP", "php",NOW()); INSERT INTO tutorials_tbl (tutorial_title, tutorial_type, submission_date) VALUES ("Learn MySQL", "db",NOW()); INSERT INTO tutorials_tbl (tutorial_title, tutorial_type, submission_date) VALUES ("Learn Oracle", "db",NOW()); Credit:

Insert rows into another table INSERT INTO tutorials_types values ("php", "php tutorials",10); INSERT INTO tutorials_types values ("db", "database tutorials",20);

Query your tables select * from tutorials_tbl; select * from tutorials_types; select * from tutorials_types inner join tutorials_tbl on tutorials_tbl.tutorial_type = tutorials_types.type;

Select statement Select – keyword indicating just looking List all columns (* for all; table.column) From – keyword indicating table names follow Table name Join type + next table + on + matching fields Where – keyword indicating row selection Column = something

Switch to another database Show databases Use

Summary What is SQL How to open a database How to create tables How to query tables – very, very basic How to switch database context