export declare class QueryBuilder<T> {
    private tableName;
    private db;
    private modelClass?;
    private conditions;
    private orderByClause?;
    private limitValue?;
    constructor(tableName: string, db: IDBDatabase | null, modelClass?: any | undefined);
    where(field: string, operator: string, value?: any): QueryBuilder<T>;
    orderBy(field: string, direction?: 'asc' | 'desc'): QueryBuilder<T>;
    limit(count: number): QueryBuilder<T>;
    all(): Promise<T[]>;
    first(): Promise<T | null>;
    count(): Promise<number>;
    exists(): Promise<boolean>;
    update(data: any): Promise<void>;
    destroyAll(): Promise<void>;
}
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