on 11-20-2009 7:51 AM
谢谢 楼上的!如果这两个QUERY 没有逻辑关系,如何处理?
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如果两个Query是没有任何联系的,CR会按它自己的理解将类型相似的字段做笛卡尔积,这样的效率会很低。
如果这两个Query是由联系的,而在你没有数据库链接窗口中给这两个Query设置联接,CR也一样会按自动把这两个Query联接上。
总之,最好不要在CR中包含两个不相关的数据源,CR会想尽办法把所有不相关的数据源关联起来。
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可以的, 你可以把多个query在Crystal Reports Designer的Database Expert里面连接起来。
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