On 17 Feb 2014, at 11:37am, Tim Streater <t...@clothears.org.uk> wrote:
> If I have a text column defined as it might be as MYCOL TEXT (that is with no > default value), is there a way to distinguish in some row or other between a > column into which no data has ever been entered, and a column that might have > been set to a string, but later set to the empty string? (or even only ever > set to the empty string, perhaps). In SQL, "no data" means "NUL" whereas an empty string is a string with zero characters in. So just do SELECT typeof(t) FROM myTable and see whether you get 'text' or not. Simon. _______________________________________________ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
