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docs/zh/sql-reference/operators/in.md
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@ -18,7 +18,7 @@ SELECT (CounterID, UserID) IN ((34, 123), (101500, 456)) FROM ...
如果左侧是索引中的单列，而右侧是一组常量，则系统将使用索引处理查询。
Don't list too many values explicitly (i.e. millions). If a data set is large, put it in a temporary table (for example, see the section “External data for query processing”），然后使用子查询。
请不要列举太多具体的常量 (比方说 几百万条)。如果数据集非常大，请把它放在一张临时表里（例如，参考章节“External data for query processing”），然后使用子查询。
运算符的右侧可以是一组常量表达式、一组带有常量表达式的元组（如上面的示例所示），或括号中的数据库表或SELECT子查询的名称。