ISqlHavingBuilder.Having(string left, string right) Method

.NET Standard 2.x

Creates a HAVING clause and adds a search condition to the HAVING clause. You can specify SQL expressions on both the left and right of the operator. The operator is '='.

Namespace: SnapObjects.Data

Assembly: SnapObjects.Data.dll

Syntax

  ISqlHavingAndOr Having(string left, string right);

Parameters

left System.String

A SQL expression on the left of the operator.

right System.String

A SQL expression on the right of the operator.

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 Example3()
        {
            var sqlQueryBuilder = new SqlQueryBuilder();

            // Groups "StudentGrade" table by StudentID and CourseID, and gets the sum of Grade of each group.
            // Specifies the HAVING condition for group to: StudentID equal to 6.              
            sqlQueryBuilder
                .Select("StudentID")
                .Select("sum(Grade)")
                .From("StudentGrade")
                .GroupBy("StudentID, CourseID")
                .Having("StudentID", "6");

            // 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] = 6)
           */
        }
    }
}

Applies to

.NET Standard

2.x