连接到韩淑敏的腾讯云MySQL库：
域名：gz-cdb-esmcsxl9.sql.tencentcdb.com
数据库名：
端口：58586
账户：root
读取表：xjdb
过滤部分字段
过滤 民族=汉 和民族=NULL
对民族计数，输出饼图
Workflow
测试MySQL连接和数据处理
Used extensions & nodes
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KNIME AG, Zurich, Switzerland
Version 4.4.1
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KNIME AG, Zurich, Switzerland
Version 4.4.1
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KNIME AG, Zurich, Switzerland
Version 4.4.1
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KNIME AG, Zurich, Switzerland
Version 4.4.1
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KNIME AG, Zurich, Switzerland
Version 4.4.1
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