Question

我正在尝试使用inner join视图和使用以下查询的表

SELECT 
   AcId, AcName, PldepPer, RepId, CustCatg, HardCode, BlockCust, CrPeriod, CrLimit, 
   BillLimit, Mode, PNotes, gtab82.memno 
FROM
   VCustomer 
INNER JOIN   
   vcustomer AS v1 ON gtab82.memacid = v1.acid 
WHERE (AcGrCode = '204' OR CreDebt = 'True') 
AND Masked = 'false'
ORDER BY AcName

，错误是

missing FROM-clause entry for table "gtab82"

Answer 1

SELECT 
   AcId, AcName, PldepPer, RepId, CustCatg, HardCode, BlockCust, CrPeriod, CrLimit, 
   BillLimit, Mode, PNotes, gtab82.memno 
FROM
   VCustomer AS v1
INNER JOIN   
   gtab82 ON gtab82.memacid = v1.AcId 
WHERE (AcGrCode = '204' OR CreDebt = 'True') 
AND Masked = 'false'
ORDER BY AcName

由于连接表中的列名重复且表名为long或表连接到自身，因此在需要使用表名称为列添加前缀时，通常只使用表名的别名。在您的情况下，您使用VCustomer的别名，但仅出于不确定的原因仅在ON子句中使用它。您可能希望查看代码的这一方面。

Answer 2

因为gtab82表不在FROM或JOIN子句中。在这些情况下，您可以引用gtab82表：gtab82.memno和gtab82.memacid

缺少表的FROM子句条目

2 个答案: