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Flink sql控制台，不识别group_concat函数吗？
2022-06-30 12:04:00 【阿里云问答】
提示，no match foubd for function singnature group_concat( )
采纳答案1：
是不是没有把参数转换成string类型（此答案整理自Flink CDC 社区）
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