how to create relationships in mysql using phpMyAdmin

mySQL doesn't support physical relations between tables. It only support the syntax(create table.....references) to make it easy to transfer a db from an other db-system to mySQL.

But: mySQL is still a relational database management system(RDBMS), but the relations between tables are not physical. If I have 2 tables

"score"
ID int
studentID int
score varchar(5)

and the table "student"
ID int
firstname varchar(32)
lastname varchar(32),

they stand alone without a physical connection. But with the studentID in the table score I have constructed the tables as if there were a physical relation between them, and I could use SQL-querys as in other DB_systems.

At first I thank, for your comments.
but, if I wanted to load data in a foreign key field then how am I to ensure whether the corresponding primary key field is available in master table(like in Ms access ).

if mysql doesn't supports this features,is any other free software which supports it is available?????

thanks in advance
manju

If you have two tables:

users
~~~~~
userID
username
password

demographics
~~~~~~~~~~~~
userID
age
sex
race

Your SQL query would be:  "select * from users, demographics where users.userID=demographics.userID" to get the data from both tables

but, if I wanted to load data in a foreign key field then how am I to ensure whether the corresponding
primary key field is available in master table(like in Ms access ).


You should be using JOINS to do this.

My friend esnagel has suggested you how do to same using LEFT JOIN.

But if you want more features Try PostGRE SQL.

http://www.at.postgresql.org/

JD

Zuhair

thats heck of a software !!!
JD