为什么约会＆lt;当日期设置为12-4-18

Question

这是我的查询

SELECT sum(paidAmount) AS payAmount
FROM Payment
where paymentDate < #12-4-18#;

这里paymentDate = 11-4-18

Answer 1

尝试以下：

SELECT sum(paidAmount) AS payAmount
FROM Payment
where paymentDate < Format (#12-4-18#, "dd-mm-yy")

Answer 2

如果可能，Access会将日期解释为MM / DD / YYYY。如果要在SQL语句中可靠地输入日期，则需要使用MM / DD / YYYY或YYYY-MM-DD作为日期符号。

SELECT sum(paidAmount) AS payAmount
FROM Payment
where paymentDate < #2018-04-12#;

这当然取决于paymentDate是一个有效的日期