Add demo

Src/Asp.NetCore2/SqlSeverTest/UserTestCases/UnitTest/Main.cs

@@ -34,6 +34,7 @@ namespace OrmTest
         }
         public static void Init()
         {
+            Unitadsfasyss.Init();
             Unitsadfasysss.Init();
             Unitadfafassys.Init();
             UnitArrayNavQuery.Init();

Src/Asp.NetCore2/SqlSeverTest/UserTestCases/UnitTest/Unitadsfasyss.cs

@@ -0,0 +1,54 @@
+using SqlSugar;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using static OrmTest.Unitaadfas1;
+using SqlSugar;
+namespace OrmTest
+{
+    internal class Unitadsfasyss
+    {
+        public static void Init()
+        {
+            var db = NewUnitTest.Db;
+            db.CodeFirst.InitTables<A_TEST>();
+            var TestQuery2 = db.Queryable<A_TEST>()
+                            .InnerJoin<A_TEST2>((a, b) => a.a == b.a)
+                            .GroupBy(a => new { a.a, bb = SqlFunc.IF(a.b == "").Return(a.b).End("无") })
+                            .Select(a => new { a.a, bb = SqlFunc.IF(a.b == "").Return(a.b).End("无") })
+                            .ToList(); 
+        }
+
+        [SugarTable("unit_A_TEST01")]
+        public partial class A_TEST
+        {
+            [SugarColumn(ColumnName = "a")]
+
+            public string a { get; set; }
+
+            [SugarColumn(ColumnName = "b")]
+
+            public string b { set; get; }
+            [SugarColumn(ColumnName = "c")]
+            public int? c { get; set; }
+        }
+
+
+
+        [SugarTable("unit_A_TEST01")]
+        public partial class A_TEST2
+        {
+            [SugarColumn(ColumnName = "a")]
+
+            public string a { get; set; }
+
+            [SugarColumn(ColumnName = "b")]
+
+            public string b { set; get; }
+            [SugarColumn(ColumnName = "c")]
+            public int? c { get; set; }
+        }
+    }
+}