Issue
I want to do something that sounds so easy, but I was not able to find an easy way to solve it:
Create a new table with, let's say, 500000 rows and get them numbered automatically (ID).
Using PHP it's probably a simple loop, but I wonder if it is really necessary to use PHP.
I am almost sure there is a simple solution using a MySQL command or even with phpMyAdmin.
Solution
Join any two tables without condition and the resulting number of rows will be multiplied. Increase the id on every select from that result using a local variable.
This creates about 1M rows (2^20);
set @i = 0;
drop TEMPORARY table if exists dummyids;
create TEMPORARY table dummyids
select @i := @i + 1 as id
from (select true union all select true) t0
join (select true union all select true) t1
join (select true union all select true) t2
join (select true union all select true) t3
join (select true union all select true) t4
join (select true union all select true) t5
join (select true union all select true) t6
join (select true union all select true) t7
join (select true union all select true) t8
join (select true union all select true) t9
join (select true union all select true) t10
join (select true union all select true) t11
join (select true union all select true) t12
join (select true union all select true) t13
join (select true union all select true) t14
join (select true union all select true) t15
join (select true union all select true) t16
join (select true union all select true) t17
join (select true union all select true) t18
join (select true union all select true) t19
;
select * from dummyids;
Answered By - Paul Spiegel
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