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We must write sql reference with guidance: https://doris.apache.org/zh-CN/community/how-to-contribute/contribute-doc/#%E5%A6%82%E4%BD%95%E7%BC%96%E5%86%99%E5%91%BD%E4%BB%A4%E5%B8%AE%E5%8A%A9%E6%89%8B%E5%86%8C
2d7d8102c7