SELECT * FROM tt018 order by mkey;
mkey	sval
-1	-1
0	0
1	1
SELECT * FROM tt019 order by mkey;
mkey	sval
-1	-1
0	0
1	1
SELECT * FROM tt020 order by mkey;
mkey	sval
-1	-1
0	0
1	1
SELECT * FROM tt021 order by mkey;
mkey	sval
-1	-1
0	0
1	1
SELECT * FROM tt022 order by mkey;
mkey	sval
-1	-1
0	0
1	1