mysql - Inserting Persons with IDs in one query? -


i need add data mysql database that:

person: pid, nameid, titleid, age

name: nameid, name

title: titleid, title

i don't want have names or title more once in db didn't see solution last_insert_id()

my approach looks that:

insert ignore name(name) values ("peter"); insert ignore title(title) values ("astronaut"); insert person(nameid, titleid, age) values ((select nameid name name = "peter"), (select nameid name name = "astronaut"), 33); 

but guess that's quite dirty approach!? if possible want add multiple persons 1 query , without having more 1 times in db. possible in nice way? thanks!

you put title , name 2 columns of table , then:

  • set 1 unique index on each column if don"t want have 2 titles or 2 names identical in db
  • or set unique index on (title,name) if don't want have 2 entries having both same name and same title.

if really want have separate tables, suggested in post, wrapping insert statements in transaction allow rollback if detect duplicate somewhere.

see design dilemma: if e-mail address used, send e-mail "e-mail address registered", can't because can't add duplicate table appear same problem, having name & email instead of name & titles.

start transaction; insert title(value) values ("prof."); select last_insert_id() @title_id;      -- instead of using user-defined variable,      -- should able use last_insert_id      -- equivalent host language mysql driver. insert username(value) values ("sylvain"); select last_insert_id() @username_id;     -- instead of using user-defined variable,      -- should able use last_insert_id      -- equivalent host language mysql driver.  insert account(username_id, email_id) values (@username_id,@title_id);  commit; 

see last_insert_id()


a third solution select before doing insert see in entry present. wouldn't push check-before-set approach @ least, require query superfluous if use correctly indexes.


Comments

Popular posts from this blog

css - Which browser returns the correct result for getBoundingClientRect of an SVG element? -

gcc - Calling fftR4() in c from assembly -

.htaccess - Matching full URL in RewriteCond -