diff --git a/tests/system-test/2-query/timetruncate.py b/tests/system-test/2-query/timetruncate.py
index 4c4ebb09df96b23b453d4048de6a1f5ceeb15c25..a48851b251235b6c6acd84b1b81d82c2cd54c7dd 100644
--- a/tests/system-test/2-query/timetruncate.py
+++ b/tests/system-test/2-query/timetruncate.py
@@ -95,7 +95,123 @@ class TDTestCase:
         # tdSql.checkData(9,0,"2018-09-17 09:00:00.009000000")
 
 
-          
+        tdSql.query("select timetruncate(1,1d) from stb")
+        tdSql.checkRows(10)
+        tdSql.query("select timetruncate(1,1u) from stb")
+        tdSql.checkRows(10)
+        tdSql.query("select timetruncate(1,1a) from stb")
+        tdSql.checkRows(10)
+        tdSql.query("select timetruncate(1,1m) from stb")
+        tdSql.checkRows(10)
+        tdSql.query("select timetruncate(1,1h) from stb")
+        tdSql.checkRows(10)
+        tdSql.query("select timetruncate(ts,1d) from stb")
+        tdSql.checkRows(10)
+        tdSql.checkData(0,0,"2018-09-17 08:00:00.000")
+        tdSql.query("select timetruncate(ts,1h) from stb")
+        tdSql.checkRows(10)
+        tdSql.checkData(0,0,"2018-09-17 09:00:00.000")
+        tdSql.query("select timetruncate(ts,1m) from stb")
+        tdSql.checkRows(10)
+        tdSql.checkData(0,0,"2018-09-17 09:00:00.000")
+        tdSql.query("select timetruncate(ts,1s) from stb")
+        tdSql.checkRows(10)
+        tdSql.checkData(0,0,"2018-09-17 09:00:00.000")
+        tdSql.query("select timetruncate(ts,1a) from stb")
+        tdSql.checkRows(10)
+        tdSql.checkData(0,0,"2018-09-17 09:00:00.000")
+        tdSql.checkData(1,0,"2018-09-17 09:00:00.001")
+        tdSql.checkData(2,0,"2018-09-17 09:00:00.002")
+        tdSql.checkData(3,0,"2018-09-17 09:00:00.003")
+        tdSql.checkData(4,0,"2018-09-17 09:00:00.004")
+        tdSql.checkData(5,0,"2018-09-17 09:00:00.005")
+        tdSql.checkData(6,0,"2018-09-17 09:00:00.006")
+        tdSql.checkData(7,0,"2018-09-17 09:00:00.007")
+        tdSql.checkData(8,0,"2018-09-17 09:00:00.008")
+        tdSql.checkData(9,0,"2018-09-17 09:00:00.009")
+        # tdSql.query("select timetruncate(ts,1u) from stb")
+        # tdSql.checkRows(10)
+        # tdSql.checkData(0,0,"2018-09-17 09:00:00.000000")
+        # tdSql.checkData(1,0,"2018-09-17 09:00:00.001000")
+        # tdSql.checkData(2,0,"2018-09-17 09:00:00.002000")
+        # tdSql.checkData(3,0,"2018-09-17 09:00:00.003000")
+        # tdSql.checkData(4,0,"2018-09-17 09:00:00.004000")
+        # tdSql.checkData(5,0,"2018-09-17 09:00:00.005000")
+        # tdSql.checkData(6,0,"2018-09-17 09:00:00.006000")
+        # tdSql.checkData(7,0,"2018-09-17 09:00:00.007000")
+        # tdSql.checkData(8,0,"2018-09-17 09:00:00.008000")
+        # tdSql.checkData(9,0,"2018-09-17 09:00:00.009000")
+        # tdSql.query("select timetruncate(ts,1b) from stb")
+        # tdSql.checkRows(10)
+        # tdSql.checkData(0,0,"2018-09-17 09:00:00.000000000")
+        # tdSql.checkData(1,0,"2018-09-17 09:00:00.001000000")
+        # tdSql.checkData(2,0,"2018-09-17 09:00:00.002000000")
+        # tdSql.checkData(3,0,"2018-09-17 09:00:00.003000000")
+        # tdSql.checkData(4,0,"2018-09-17 09:00:00.004000000")
+        # tdSql.checkData(5,0,"2018-09-17 09:00:00.005000000")
+        # tdSql.checkData(6,0,"2018-09-17 09:00:00.006000000")
+        # tdSql.checkData(7,0,"2018-09-17 09:00:00.007000000")
+        # tdSql.checkData(8,0,"2018-09-17 09:00:00.008000000")
+        # tdSql.checkData(9,0,"2018-09-17 09:00:00.009000000")
+
+        tdSql.query("select timetruncate(1,1d) from stb_1")
+        tdSql.checkRows(10)
+        tdSql.query("select timetruncate(1,1u) from stb_1")
+        tdSql.checkRows(10)
+        tdSql.query("select timetruncate(1,1a) from stb_1")
+        tdSql.checkRows(10)
+        tdSql.query("select timetruncate(1,1m) from stb_1")
+        tdSql.checkRows(10)
+        tdSql.query("select timetruncate(1,1h) from stb_1")
+        tdSql.checkRows(10)
+        tdSql.query("select timetruncate(ts,1d) from stb_1")
+        tdSql.checkRows(10)
+        tdSql.checkData(0,0,"2018-09-17 08:00:00.000")
+        tdSql.query("select timetruncate(ts,1h) from stb_1")
+        tdSql.checkRows(10)
+        tdSql.checkData(0,0,"2018-09-17 09:00:00.000")
+        tdSql.query("select timetruncate(ts,1m) from stb_1")
+        tdSql.checkRows(10)
+        tdSql.checkData(0,0,"2018-09-17 09:00:00.000")
+        tdSql.query("select timetruncate(ts,1s) from stb_1")
+        tdSql.checkRows(10)
+        tdSql.checkData(0,0,"2018-09-17 09:00:00.000")
+        tdSql.query("select timetruncate(ts,1a) from stb_1")
+        tdSql.checkRows(10)
+        tdSql.checkData(0,0,"2018-09-17 09:00:00.000")
+        tdSql.checkData(1,0,"2018-09-17 09:00:00.001")
+        tdSql.checkData(2,0,"2018-09-17 09:00:00.002")
+        tdSql.checkData(3,0,"2018-09-17 09:00:00.003")
+        tdSql.checkData(4,0,"2018-09-17 09:00:00.004")
+        tdSql.checkData(5,0,"2018-09-17 09:00:00.005")
+        tdSql.checkData(6,0,"2018-09-17 09:00:00.006")
+        tdSql.checkData(7,0,"2018-09-17 09:00:00.007")
+        tdSql.checkData(8,0,"2018-09-17 09:00:00.008")
+        tdSql.checkData(9,0,"2018-09-17 09:00:00.009")
+        # tdSql.query("select timetruncate(ts,1u) from stb_1")
+        # tdSql.checkRows(10)
+        # tdSql.checkData(0,0,"2018-09-17 09:00:00.000000")
+        # tdSql.checkData(1,0,"2018-09-17 09:00:00.001000")
+        # tdSql.checkData(2,0,"2018-09-17 09:00:00.002000")
+        # tdSql.checkData(3,0,"2018-09-17 09:00:00.003000")
+        # tdSql.checkData(4,0,"2018-09-17 09:00:00.004000")
+        # tdSql.checkData(5,0,"2018-09-17 09:00:00.005000")
+        # tdSql.checkData(6,0,"2018-09-17 09:00:00.006000")
+        # tdSql.checkData(7,0,"2018-09-17 09:00:00.007000")
+        # tdSql.checkData(8,0,"2018-09-17 09:00:00.008000")
+        # tdSql.checkData(9,0,"2018-09-17 09:00:00.009000")
+        # tdSql.query("select timetruncate(ts,1b) from stb_1")
+        # tdSql.checkRows(10)
+        # tdSql.checkData(0,0,"2018-09-17 09:00:00.000000000")
+        # tdSql.checkData(1,0,"2018-09-17 09:00:00.001000000")
+        # tdSql.checkData(2,0,"2018-09-17 09:00:00.002000000")
+        # tdSql.checkData(3,0,"2018-09-17 09:00:00.003000000")
+        # tdSql.checkData(4,0,"2018-09-17 09:00:00.004000000")
+        # tdSql.checkData(5,0,"2018-09-17 09:00:00.005000000")
+        # tdSql.checkData(6,0,"2018-09-17 09:00:00.006000000")
+        # tdSql.checkData(7,0,"2018-09-17 09:00:00.007000000")
+        # tdSql.checkData(8,0,"2018-09-17 09:00:00.008000000")
+        # tdSql.checkData(9,0,"2018-09-17 09:00:00.009000000")
     def stop(self):
         tdSql.close()
         tdLog.success("%s successfully executed" % __file__)
diff --git a/tests/system-test/fulltest.sh b/tests/system-test/fulltest.sh
index 0b7a71bbe4dc7ccbecb0235802690cf7c8ab4e34..026dba6490ee25c7ba58156e97fd0d484cf0b822 100755
--- a/tests/system-test/fulltest.sh
+++ b/tests/system-test/fulltest.sh
@@ -14,7 +14,10 @@ python3 ./test.py -f 2-query/varchar.py
 #python3 ./test.py -f 2-query/timezone.py
 python3 ./test.py -f 2-query/Now.py
 python3 ./test.py -f 2-query/Today.py
-
+python3 ./test.py -f 2-query/max.py
+python3 ./test.py -f 2-query/min.py
+python3 ./test.py -f 2-query/count.py
+# python3 ./test.py -f 2-query/Timediff.py
 #python3 ./test.py -f 2-query/cast.py