public void JoinFieldsTest()
        {
            var actual = SqlBase.JoinFields(
                new List <string>
            {
                "aaaaa",
                "bbbbb",
                "",
                "ccc",
                "",
                "ddddddd",
            });

            Assert.AreEqual("aaaaa,bbbbb,ccc,ddddddd", actual);
        }