Add an UNIQUE constraint on song title.

diff --git a/ccbs.sql b/ccbs.sql
index 53289ec..e4a129f 100644 (file)
--- a/ccbs.sql
+++ b/ccbs.sql
@@ -15,7 +15,9 @@ CREATE TABLE songs (
        title VARCHAR NOT NULL,
        artist VARCHAR NOT NULL,
        minbpm INTEGER NOT NULL,
-       maxbpm INTEGER NOT NULL
+       maxbpm INTEGER NOT NULL,
+
+       UNIQUE ( title )
 );
 
 -- CREATE TABLE machinesongs etc.