mysql - 选择操作期间出现不明确的列名错误

Question

我收到以下错误:

Msg 209, Level 16, State 1, Line 3 Ambiguous column name 'NUM_0'.

SELECT BPR_0, BPAPAY_0, BPYNAM_0, BPYADDLIG_0, NUM_0 -- and so on
  FROM PROD.SINVOICE, PROD.SINVOICED
  WHERE SINVOICE.NUM_0 = SINVOICED.NUM_0

Answer 1

用表 alise 明确限定列名:

select sin.col, . . ., sind.col, . . ., c.col, . . .
from prod.sininvoice sin inner join
     prod.sininvoiced sind
     on sind.num_0 = sin_num_0 inner join
     prod.customer c 
     on . . .;