Query PartitionBy

SqlServerTest/Demos/Query.cs

@@ -102,6 +102,11 @@ namespace OrmTest.Demo
              .GroupBy(it => new { it.Id, it.Name }).Having(it => SqlFunc.AggregateAvg(it.Id) > 0)
              .Select(it => new { idAvg = SqlFunc.AggregateAvg(it.Id), name = it.Name }).ToList();
 
+            // group id,name take first
+            var list3 = db.Queryable<Student>()
+                .PartitionBy(it => new { it.Id, it.Name }).Take(1).ToList();
+
+
             //SQL:
             //SELECT AVG([Id]) AS[idAvg], [Name] AS[name]  FROM[Student] GROUP BY[Name],[Id] HAVING(AVG([Id]) > 0 )
 

SqlSugar/Abstract/QueryableProvider/QueryableProvider.cs

@@ -258,6 +258,8 @@ namespace SqlSugar
 
         public ISugarQueryable<T> PartitionBy(Expression<Func<T, object>> expression)
         {
+            if (QueryBuilder.Take == null)
+                QueryBuilder.Take = 0;
             _PartitionBy(expression);
             return this;
         }

SqlSugar/Abstract/SqlBuilderProvider/Detail/QueryBuilder.cs

@@ -226,16 +226,27 @@ namespace SqlSugar
             if (Skip != null && Take == null)
             {
                 if (this.OrderByValue == null) this.OrderByValue = " Order By GetDate() ";
+                if (this.PartitionByValue.IsValuable()) {
+                    this.OrderByValue = this.PartitionByValue + this.OrderByValue;
+                }
                 return string.Format(PageTempalte, sql.ToString(), GetOrderByString, Skip.ObjToInt() + 1, long.MaxValue);
             }
             else if (Skip == null && Take != null)
             {
                 if (this.OrderByValue == null) this.OrderByValue = " Order By GetDate() ";
+                if (this.PartitionByValue.IsValuable())
+                {
+                    this.OrderByValue = this.PartitionByValue + this.OrderByValue;
+                }
                 return string.Format(PageTempalte, sql.ToString(), GetOrderByString, 1, Take.ObjToInt());
             }
             else if (Skip != null && Take != null)
             {
                 if (this.OrderByValue == null) this.OrderByValue = " Order By GetDate() ";
+                if (this.PartitionByValue.IsValuable())
+                {
+                    this.OrderByValue = this.PartitionByValue + this.OrderByValue;
+                }
                 return string.Format(PageTempalte, sql.ToString(), GetOrderByString, Skip.ObjToInt() + 1, Skip.ObjToInt() + Take.ObjToInt());
             }
             else