Fix sql.

Update without rows doesn't do anything, which meant the select didn't
return anything.

s/sql.sql

@@ -1,4 +1,4 @@
 CREATE TABLE HELLO (HELLO CHAR(12))
-UPDATE HELLO
+INSERT INTO HELLO
-      SET HELLO = 'HELLO WORLD!'
+      VALUES ('HELLO WORLD!')
 SELECT * FROM HELLO