Oracle上的SQL查询给出了错误

Question

SELECT A.PD_END_DT Recent_PD_END_DT,
       B.PD_END_DT Last_PD_END_DT,
       A.NRX_CNT - B.NRX_CNT DELTA
FROM   wkly_lnd.lnd_wkly_plan_rx_summary A,
       wkly_lnd.lnd_wkly_plan_rx_summary B 
WHERE  a.MKT_I D =b.MKT_ID;

Answer 1

你有一个空间就行了

WHERE  a.MKT_I D =b.MKT_ID;

它应该是:

WHERE  a.MKT_ID =b.MKT_ID;