Adding and amending data in a database table

SQL Primer as Used in MySQL example from a Well House Consultants training course
More on SQL Primer as Used in MySQL [link]

This example is described in the following article(s):
• INSERT, DELETE, REPLACE and UPDATE - changing the content of SQL tables - [link]

Source code: sql_demo.sql Module: S152

drop table if exists journey;

create table journey (
     jid int primary key not null auto_increment,
     start_at text,
     end_at text,
     miles int);

# Complete new records
insert into journey values (1,"Chippenham","London",95);
insert into journey values (2,"Chippenham","Slough",80);
insert into journey values (3,"Llandod","Hereford",35);
insert into journey values (4,"Hereford","Newport",40);

# Records where only some columns are supplied
insert into journey (start_at, end_at, miles) values ("Melksham","Acton",95);
insert into journey (start_at, end_at, miles) values ("Melksham","Chippenham",5);

delete from journey where jid = 4;
replace into journey values (3,"Llandrindod Wells","Hereford",35);
update journey set miles = 96 where jid = 1;

Learn about this subject

This module and example are covered on the following public courses:
* Deploying LAMP - Linux, Apache, MySQL, Perl/PHP
* Linux Web Server
* MySQL
* Deploying Java Applications on Linux / Unix
Also available on on site courses for larger groups

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