export declare class AggregateDisplayService {
    /**
     * Format aggregate (non-grouped) result for display.
     * Returns lines for console output, or JSON string if jsonOutput is true.
     */
    formatAggregateResult(stats: any, tableName: string, jsonOutput: boolean): string[];
    /**
     * Format count result for display.
     * Returns lines for console output, or JSON string if jsonOutput is true.
     */
    formatCountResult(count: number, tableName: string, query: string | undefined, jsonOutput: boolean): string[];
    /**
     * Format grouped aggregate result for display.
     * Returns lines for console output, or JSON string if jsonOutput is true.
     */
    formatGroupedResult(groups: any[], tableName: string, jsonOutput: boolean): string[];
}
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