| md_check_not_exists | R Documentation | 
判断基础资料是否存在
md_check_not_exists(
  conn = tsda::conn_rds("jlrds"),
  FYear = 2021,
  FPeriod = 8,
  table_name = "t_mrpt_costCenterRatio_sap"
)
| conn | 连接 | 
| FYear | 年份 | 
| FPeriod | 期间 | 
| table_name | 表名 | 
返回值
md_check_not_exists()
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