Re: Simple way to get missing number

Emi Lu <emilu(at)encs(dot)concordia(dot)ca> wrote:

> Good morning,
>
> May I know is there a simple sql command which could return missing
> numbers please?
>
> For example,
>
> t1(id integer)
>
> values= 1, 2, 3 .... 5000000
>
> select miss_num(id)
> from t1 ;

something like

,----[ code ]
| test=# select * from emi_lu ;
| i
| ---
| 1
| 2
| 3
| 5
| 6
| 8
| 9
| (7 rows)
|
| Time: 0,246 ms
| test=*# select * from generate_Series(1,10) s left join emi_lu on
| (s=emi_lu.i) where i is null;
| s | i
| ----+---
| 4 |
| 7 |
| 10 |
| (3 rows)
`----

this?

Andreas
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