users := []User{{
		Name:     "groupby",
		Age:      10,
		Birthday: Now(),
		Active:   true,
	}, {
		Name:     "groupby",
		Age:      20,
		Birthday: Now(),
	}, {
		Name:     "groupby",
		Age:      30,
		Birthday: Now(),
		Active:   true,
	}, {
		Name:     "groupby1",
		Age:      110,
		Birthday: Now(),
	}, {
		Name:     "groupby1",
		Age:      220,
		Birthday: Now(),

// GroupBy group by clause
type GroupBy struct {
	Columns []Column
	Having  []Expression
}

// Name from clause name
func (groupBy GroupBy) Name() string {
	return "GROUP BY"
}

// Build build group by clause
func (groupBy GroupBy) Build(builder Builder) {
	for idx, column := range groupBy.Columns {
		if idx > 0 {
			builder.WriteByte(',')
		}

		builder.WriteQuoted(column)
	}

	if len(groupBy.Having) > 0 {

import org.codelibs.fess.util.ComponentUtil;
import org.dbflute.exception.IllegalBehaviorStateException;
import org.dbflute.util.DfTypeUtil;

/**
 * @author FreeGen
 */
public class GroupBhv extends BsGroupBhv {
    private String indexName = null;

    @Override
    protected String asEsIndex() {
        if (indexName == null) {

 * maintaining data consistency between groups and associated users.
 */
public class GroupService {

    /** Behavior class for group database operations */
    @Resource
    protected GroupBhv groupBhv;

    /** Configuration settings for the Fess application */
    @Resource
    protected FessConfig fessConfig;

    /** Behavior class for user database operations */
    @Resource

	}{
		{
			[]clause.Interface{clause.Select{}, clause.From{}, clause.GroupBy{
				Columns: []clause.Column{{Name: "role"}},
				Having:  []clause.Expression{clause.Eq{"role", "admin"}},
			}},
			"SELECT * FROM `users` GROUP BY `role` HAVING `role` = ?",
			[]interface{}{"admin"},
		},
		{
			[]clause.Interface{clause.Select{}, clause.From{}, clause.GroupBy{
				Columns: []clause.Column{{Name: "role"}},

	<component name="userBhv" class="org.codelibs.fess.opensearch.user.exbhv.UserBhv"/>
	<component name="roleBhv" class="org.codelibs.fess.opensearch.user.exbhv.RoleBhv"/>
	<component name="groupBhv" class="org.codelibs.fess.opensearch.user.exbhv.GroupBhv"/>

        assertArrayEquals(new String[] { "group1", "group2" }, groups);

        OpenIdConnectCredential credential = new OpenIdConnectCredential(attributes);
        assertEquals("******@****.***", credential.getUserId());
        assertArrayEquals(new String[] { "group1", "group2" }, credential.getUserGroups());
    }

			}},
			clause.Where{Exprs: []clause.Expression{
				clause.Or(clause.Gt{Column: "score", Value: 100}, clause.Like{Column: "name", Value: "%linus%"}),
			}},
			clause.GroupBy{Columns: []clause.Column{{Name: "role"}}, Having: []clause.Expression{clause.Eq{"role", "admin"}}},
			clause.Limit{Limit: &limit10, Offset: 20},

        return "org.codelibs.fess.opensearch.user.cbean.GroupCB";
    }

    @Override
    public String getBehaviorTypeName() {
        return "org.codelibs.fess.opensearch.user.exbhv.GroupBhv";
    }

    // ===================================================================================
    //                                                                         Object Type

func (db *DB) Group(name string) (tx *DB) {
	tx = db.getInstance()

	fields := strings.FieldsFunc(name, utils.IsValidDBNameChar)
	tx.Statement.AddClause(clause.GroupBy{
		Columns: []clause.Column{{Name: name, Raw: len(fields) != 1}},
	})
	return
}

// Having specify HAVING conditions for GROUP BY
//
//	// Select the sum age of users with name jinzhu