export declare class Asterisk {
    private static instance;
    private readonly unique;
    private constructor();
    static getInstance(): Asterisk;
    getStmt(): string;
}
export declare const ASTERISK: Asterisk;
export declare class Distinct {
    private static instance;
    private readonly unique;
    private constructor();
    static getInstance(): Distinct;
    toString(): string;
}
export declare const DISTINCT: Distinct;
export declare class All {
    private static instance;
    private readonly unique;
    private constructor();
    static getInstance(): All;
    toString(): string;
}
export declare const ALL: All;
export declare class Default {
    private static instance;
    private readonly unique;
    private constructor();
    static getInstance(): Default;
    getStmt(): string;
}
export declare const DEFAULT: Default;