获取最后插入的行的ID ORACLE / PHP

Question

How to get the last id using php

similar mysqli_insert_id($conexao)

Answer 1

Many Oracle programs use database objects called SEQUENCE s to generate unique IDs. If you know which sequence is used for the id in the table you just INSERT ed into, simply say

SELECT sequencename.CURRVAL FROM DUAL;

immediately after the insert, in the same database connection, and you'll get the id number.

SELECT MAX(id) and similar constructs work fine as long as you only, ever, have one connection to the database: meaning they don't work. Basically they're not thread-safe. They're also more expensive than CURRVAL .

Answer 2

Assuming that your ids are auto-incremented in ascending order you could query for the highest id...

SELECT id from table ORDER BY id DESC LIMIT 1

that should give you the highest id and if your ids are auto-incremented this should be the last entry...