Finding the next available id in MySQL

Question

I have to find the next available id (if there are 5 data in database, I have to get the next available insert place which is 6) in a MySQL database. How can I do that? I h

Answer 1

you said:

my id coloumn is auto increment i have to get the id and convert it to another base.So i need to get the next id before insert cause converted code will be inserted too.

what you're asking for is very dangerous and will lead to a race condition. if your code is run twice at the same time by different users, they will both get 6 and their updates or inserts will step all over each other.

i suggest that you instead INSERT in to the table, get the auto_increment value using LAST_INSERT_ID(), and then UPDATE the row to set whatever value you have that depends on the auto_increment value.