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Split 函数与Join函数是互逆的作用，它可以将字符串转换为数组。
在数据集过滤章节中为您介绍过如何制作一个带有查询参数的报表，示例中使用了用户输入型的参数且每次只能查询一个大区的数据。如果我们输入多个大区的值，就会被识别为同一个字符串而查不到数据。那我们如何实现一次查询多个大区的数据呢？
接下来就为您介绍使用 split 函数实现该需求的具体步骤。
1. 制作一个使用了手动输入报表查询参数的报表，比如使用大区进行查询的报表。
2. 编辑数据集，将查询参数的数据使用Split函数 { Split(@销售大区, ",") } 进行转换，并将SQL语句修改为 select * from 销售明细 where 销售大区 IN (@查询参数1) 。
Split 表达式解析：split 函数将以逗号分隔的字符串转换为了一个数组。
3. 预览报表，可见此时已经可以输入多个大区的名称进行查询。
注意
请使用英文输入法的逗号”,“分隔大区名称。