Question

我想只从fb中获取指定生日的记录，我不想要空记录。我有以下查询：

String fqlQuery = "{" +
                        "'friends':'SELECT uid2 FROM friend WHERE uid1 = me()'," +
                        "'friendinfo':'SELECT uid, name, pic_square, birthday FROM user WHERE uid IN" +
                        "(SELECT uid2 FROM #friends)'," + 
                        "}";

它取出了所有内容，我尝试了以下内容：

String fqlQuery = "{" +
                        "'friends':'SELECT uid2 FROM friend WHERE uid1 = me()'," +
                        "'friendinfo':'SELECT uid, name, pic_square, birthday FROM user WHERE uid IN" +
                        "(SELECT uid2 FROM #friends)'," + "AND birthday != null"+
                        "}";

它没有给我任何结果，这样做的正确方法是什么？

Answer 1

在FQL中，只需使用AND something检查something是否为空。

以下是您更正的FQL查询：

{
'friends':'SELECT uid2 FROM friend WHERE uid1 = me()',
'friendinfo':'SELECT uid, name, pic_square, birthday FROM user 
               WHERE uid IN(SELECT uid2 FROM #friends) 
                 AND birthday'
}

Java代码：

String fqlQuery = "{" +
                        "'friends':'SELECT uid2 FROM friend WHERE uid1 = me()'," +
                        "'friendinfo':'SELECT uid, name, pic_square, birthday FROM user WHERE uid IN" +
                        "(SELECT uid2 FROM #friends) AND birthday'"+
                  "}";

FQL查询仅获取具有生日的记录。

1 个答案: