使用sqldf仅显示count(*)> 2000的行

Question

我试图使用下面的代码选择除前2000行以外的所有行,但是我收到以下错误.

new_table = sqldf("select units, count(*)
                   from old_table
                   group by units
                   where count(*) > 2000")
Error in sqliteExecStatement(con, statement, bind.data) : 
  RS-DBI driver: (error in statement: near "where": syntax error)

Answer 1

我想你只是在寻找HAVING:

select units, count(*)
from old_table
group by units
having count(*) > 2000

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