"li yuqian" <[EMAIL PROTECTED]> wrote in message news:[EMAIL PROTECTED] > i follow the documents for sqlite function and change the sql to: > ----------- > SELECT t.variable, t.value, ifnull(d.value, > group_concat(substr(t.value,1,0),'off')) > state FROM globals t LEFT JOIN globals d ON (substr(t.variable,5) = > substr( d.variable,12) and t.variable LIKE 'OUT\_%' ESCAPE '\' and > d.variable LIKE 'OUTDISABLE\_%' ESCAPE '\') ORDER BY t.variable; > --------- > always get SQL error: no such function: group_concat, but the sqlite > documents have this function!
group_concat is an aggregate function (like max and such), so it's not what you need anyway. It's probably new in some version of SQLite later than the one you have. SQLite doesn't have concat() function, but has concatenation operator || (two pipe characters). So simply replace concat(a, b) with a || b I'm still pretty sure that substr(t.value,1,0) always returns an empty string, so you could just as well write '' (two single quotes). I suspect you meant to do something different, but it's not clear what. Igor Tandetnik _______________________________________________ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
