import type { Entities } from './types';
export declare class Database<T extends Entities = {}> {
    private db;
    private databaseName;
    private entities;
    private sql;
    private static instance;
    private constructor();
    static getInstance(options?: any): Database;
    private prepare;
    private createConnection;
    select<T>(entityName: string, options?: T): import("../QueryArray").QueryArray<any>;
    selectOne<T>(entityName: string, options?: T): any;
    insertOrUpdate(entityName: string, target: any, prop: string | symbol, value: any): void;
}
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