以下查询在 Access 中不起作用。
SELECT Fields.FieldId, PrecisionSettings.DecimalPlaces
from Fields left outer join FieldGroup on Fields.FieldGroupId = FieldGroup.FieldGroupId
left outer join Category on FieldGroup.CategoryId = Category.CategoryId
left outer join PrecisionSettings on
Category.InputAttributesID=PrecisionSettings.AttributesID
它给出了查询表达式中缺少运算符的错误。
最佳答案
在 Access 中,您一次只能连接两个结果。要加入更多表,您需要更多括号:
SELECT
Fields.FieldId,
PrecisionSettings.DecimalPlaces
FROM
(
(
Fields
LEFT OUTER JOIN FieldGroup ON Fields.FieldGroupId = FieldGroup.FieldGroupId
)
LEFT OUTER JOIN Category ON FieldGroup.CategoryId = Category.CategoryId
)
LEFT OUTER JOIN PrecisionSettings ON Category.InputAttributesID = PrecisionSettings.AttributesID
https://stackoverflow.com/questions/10547837/