我正在尝试在 Microsoft Access SQL 中编写此查询，但我终究无法找出代码中的语法错误。
SELECT base.study_group, base.NPI,inv.log_date AS invite_date, rec.log_date as
recieved_date, rej.log_date as reject_date
FROM CODAAC_master AS base
LEFT JOIN Pre_Log AS inv ON base.NPI = inv.NPI AND inv.tracking_event='INVA'
LEFT JOIN Pre_Log AS rec ON base.NPI = rec.NPI AND rec.tracking_event='RECA'
LEFT JOIN Pre_Log AS rej ON base.NPI = rej.NPI AND rej.tracking_event='REJA'
WHERE base.study_year = '2013'
ORDER BY base.study_group, base.NPI;
我得到的错误是:
"Syntax error (missing operator) in query expression"
最佳答案
MS Access 需要用括号括住多个连接:
SELECT base.study_group,
base.NPI,
inv.log_date AS invite_date,
rec.log_date as recieved_date,
rej.log_date as reject_date
FROM ((CODAAC_master AS base
LEFT JOIN Pre_Log AS inv
ON base.NPI = inv.NPI AND inv.tracking_event='INVA')
LEFT JOIN Pre_Log AS rec
ON base.NPI = rec.NPI AND rec.tracking_event='RECA')
LEFT JOIN Pre_Log AS rej
ON base.NPI = rej.NPI AND rej.tracking_event='REJA'
WHERE base.study_year = '2013'
ORDER BY base.study_group, base.NPI;
关于sql - 无法弄清楚 Access SQL 语法错误，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/15705375/