ISqlHavingBuilder.Having(ISqlHavingCondition condition, string havingName) Method

.NET Standard 2.x

Creates a HAVING clause, and adds a search condition to the HAVING clause by an ISqlHavingCondition object and specifies the name for the search condition.

Namespace: SnapObjects.Data

Assembly: SnapObjects.Data.dll

Syntax

  ISqlHavingAndOr Having(ISqlHavingCondition condition, string havingName);

Parameters

condition SnapObjects.Data.ISqlParameter

An ISqlHavingCondition object which represents a search condition in the HAVING clause.

This object can be created by using SqlBuilder.Having method and so on.

havingName System.String

The name for the search condition.

Returns

SnapObjects.Data.ISqlHavingAndOr

Returns the ISqlHavingAndOr object which can be used to add more search conditions to the current HAVING clause.

Examples

The following code example demonstrates how to use the Having method to specify the HAVING condition for groups.

using SnapObjects.Data;
using System;

namespace Appeon.ApiDoc.ISqlHavingBuilderExamples
{
    public class HavingExample
    {
        private readonly SchoolContext _context;

        public HavingExample(SchoolContext dataContext)
        {
            // Sets the data context.
            _context = dataContext;
        }

        public void Example8()
        {
            var sqlQueryBuilder = new SqlQueryBuilder();

            // Defines a HAVING condition.            
            var having = SqlBuilder.HavingRaw("StudentID < 10");

            // Groups "StudentGrade" table by StudentID and CourseID, and gets the sum of Grade of each group. 
            // The HAVING condition for groups is the condition defined above: StudentID < 10.  
            // Specifies a name for the HAVING conditon so it can be modified or removed easily.      
            sqlQueryBuilder
                .Select("StudentID")
                .Select("sum(Grade)")
                .From("StudentGrade")
                .GroupBy("StudentID, CourseID")
                .Having(having, "having");

            // Converts to raw SQL for the database corresponding to the data context.                  
            string sql = sqlQueryBuilder.ToSqlString(_context);

            Console.WriteLine(sql);

            /*This code example produces the following output:           
              SELECT
                [StudentID],
                sum(Grade)
              FROM [StudentGrade]
              GROUP BY
                 [StudentID],
                 [CourseID]
                 HAVING ([StudentID] < 10)
           */
        }
    }
}

Applies to

.NET Standard

2.x