On Thu, Dec 1, 2016 at 1:12 PM, James Walker <jam...@frameforge3d.com>
wrote:
> Let's say I have a table INFO with columns PRICE and IDENT, and I want to
> find the IDENT of the row with the minimum value of PRICE. In SQLite 3, I
> can say
>
> SELECT MIN(PRICE), IDENT FROM INFO;
>
> and get what I want. But in SQLite 2 (legacy code), this doesn't work...
> I get the minimum value, but NULL in the IDENT column. I could say
>
> SELECT PRICE, IDENT FROM INFO ORDER BY PRICE;
>
> and ignore all but the first row of the result, but I'm sure there must be
> a better way?
>
>
Well, standard SQL seems to work, but would return multiple lines if
multiple rows have the minimal price, but you could use LIMIT 1:
SQLite version 3.14.2 2016-09-12 18:50:49
Enter ".help" for usage hints.
Connected to a transient in-memory database.
Use ".open FILENAME" to reopen on a persistent database.
sqlite> create table info(price int, ident text);
sqlite> insert into info(price,ident) values(1,'a1');
sqlite> insert into info(price,ident) values(2,'b');
sqlite> insert into info(price,ident) values(3,'c');
sqlite> insert into info(price,ident) values(1,'a');
sqlite> select price, ident from info where price=(select min(price) from
info);
1|a1
1|a
sqlite> select price, ident from info where price=(select min(price) from
info) limit 1;
1|a1
sqlite>
In sqlite 2 the same works:
SQLite version 2.8.17
Enter ".help" for instructions
sqlite> create table info(ident text,price int);
sqlite> insert into table(ident, price) values('a',1);
SQL error: near "table": syntax error
sqlite> insert into info(ident, price) values('a',1);
sqlite> insert into info(ident, price) values('a1',1);
sqlite> insert into info(ident, price) values('b',2);
sqlite> insert into info(ident, price) values('c',3);
sqlite> select min(price), ident from info;
1|
sqlite> select price, ident from info where price=(select min(price) from
info);
1|a
1|a1
sqlite> select price, ident from info where price=(select min(price) from
info) limit 1;
1|a
sqlite>
--
Heisenberg may have been here.
Unicode: http://xkcd.com/1726/
Maranatha! <><
John McKown
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