PDO登录错误

Question

错误 SQLSTATE [HY093]：参数号无效：参数未定义！

echo "select * from <schema>.events limit 5000 ;" | /home.../bin/cqlsh > output.dat

什么是正确的代码？请任何人找出错误并正确形成代码

Answer 1

您的arrange声明错误。见这里，

sorted.v %>%
    group_by(SampleId) %>%
    top_n(10, LumenLength) %>%
    summmarise(MeanLumenArea = mean(LumenLength))

应该是，

execute()