Question

我的Qt应用程序中使用了以下MySQL查询：

query.prepare(QString("SELECT productName, value, COUNT(value), SUM(value)"
                  "FROM tblmystock"
                  "WHERE time>=\'%1\' AND time<=\'%2\'"
                  "GROUP BY productName, value").arg(startDateTime, endDateTime));

我收到以下错误：You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near'>='2012-04-24 00:00:00' AND time<='2012-04-24 23:59:59:59' GROUP BY productName' at line 1 QMYSQL: Unable to execute query

即使我尝试使用bindValues，它也会失败并出现同样的错误。

但是当我在MySQL提示符下执行相同的查询时，它可以正常工作：

mysql> SELECT productName, value, COUNT(value), SUM(value) FROM tblmystock WHERE time>='2012-04-24 00:00:00' AND time<='2012-04-25 23:59:59' GROUP BY productName, value;

有人知道解决方法吗？

Answer 1

time是保留关键字。使用反引号逃脱它。
您也可以使用between代替<=和>=

WHERE `time` between '2012-04-24 00:00:00' AND '2012-04-25 23:59:59'

MySQL select语句的QSlQuery失败

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