ISqlHavingAndOr<TBuilder>.AndHaving(string left, ISqlBuilder sqlBuilder) Method

.NET Standard 2.x

Adds the AND logical operator and a search condition to the HAVING clause. Specifies a SQL expression on the left of the operator and a SQL subquery on the right of the operator. The operator is '='.

Namespace: SnapObjects.Data

Assembly: SnapObjects.Data.dll

Syntax

  TBuilder AndHaving(string left, ISqlBuilder sqlBuilder);

Parameters

left System.String

A SQL expression on the left of the operator.

sqlBuilder SnapObjects.Data.ISqlBuilder

An ISqlBuilder object which represents a SQL subquery on the right of the operator.

Returns

TBuilder

Returns the TBuilder 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 AndHaving method to add an AND condition to the HAVING clause.

using SnapObjects.Data;
using System;

namespace Appeon.ApiDoc.ISqlHavingAndOrExamples
{
    public class AndHavingExample
    {
        private readonly SchoolContext _context;

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

        public void Example5()
        {
            var sqlQueryBuilder = new SqlQueryBuilder();

            // Sets a query to get the smallest Course ID.
            var sqlBuilder = new SqlQueryBuilder();
            sqlBuilder.SelectRaw("min(CourseID)")
                      .From("Course");

            // Groups "StudentGrade" table by StudentID and CourseID, and gets the sum of Grade of each group.
            // Specifies the HAVING condition for group as "StudentID > 0" and CourseID equal to the return result of the subquery.
            sqlQueryBuilder
                .Select("StudentID")
                .Select("sum(Grade)")
                .From("StudentGrade")
                .GroupBy("StudentID, CourseID")
                .HavingRaw("StudentID > 0")
                .AndHaving("CourseID", sqlBuilder);

            // 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] > 0
                AND [CourseID] = (SELECT
                                  MIN([CourseID])
                                  FROM [Course]))
           */
        }
    }
}

Applies to

.NET Standard

2.x