These are about the most basic things to know! But I had a hard time learning myself, so I made a text file with some commands. Just remember I don't know what I am doing either, so be careful before using these! Here are the most basic commands from my collection:
INSERT: login, mysql, use db,
insert into Table (Field1,Field2,Field3,Field4) values ('NEW TEXT HERE','NEW TEXT HERE','NEW TEXT HERE','NEW TEXT HERE');
MODIFY: login, mysql, use db,
update Table set Field='NEW TEXT HERE'
where Field='TEXT HERE' and Field='NEW TEXT HERE';
DELETE: login, mysql, use db,
delete from Table where Field='TEXT HERE';
COPY: login, mysql, use db,
insert into Table select * from Table2 where Field like 'A%';
These are commands for PuTTY, but you should get the idea. If you have phpMyAdmin, use it! It makes things muuuch easier! 🙂 I have the books php & mysql for dummies and sql for dummies; they are veeery helpful! 🙂