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Update index.md

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docs/zh/14-reference/12-config/index.md
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@ -235,7 +235,7 @@ taos -C
| 属性 | 说明 |
| -------- | ---------------------------------------------------------------------------------------------------------------------------------------------- |
| 适用范围 | 仅客户端适用 |
| 含义 | 查询超级表时，last(\*)/last_row(\*)/first(\*) 是否返回标签列 |
| 含义 | 查询超级表时，last(\*)/last_row(\*)/first(\*) 是否返回标签列；查询普通表、子表时，不受该参数影响。 |
| 取值范围 | 0：不返回标签列，1：返回标签列 |
| 缺省值 | 0 |
| 补充说明 | 该参数设置为 0 时，last(\*)/last_row(\*)/first(\*) 只返回超级表的普通列；为 1 时，返回超级表的普通列和标签列 |