0

我有这样的疑问

SELECT 
    COUNT(*) AS TotalAmount
FROM
    CurrentApplications
WHERE
    CurrentApplications.resp_id IN (1)
    AND FinalOutcome_date BETWEEN '2013-04-01 00:00:00' AND '2013-04-30 23:59:59'
    AND (FinalOutcome >= 1 AND FinalOutcome <= 2)
    AND (FIND_IN_SET(14, app_category)
    OR FIND_IN_SET(15, app_category)
    OR FIND_IN_SET(26, app_category))

它在 MySQL Workbench 中返回值 10。

现在我正在检索这样的查询：

insideResultsSet = insideStatement
                .executeQuery("SELECT COUNT(*) AS TotalAmount  FROM CurrentApplications  WHERE CurrentApplications.resp_id  IN(1)  AND FinalOutcome_date  BETWEEN '2013-04-01 00:00:00' AND '2013-04-30 23:59:59' AND (FinalOutcome >=1 AND FinalOutcome <= 2)  AND(  FIND_IN_SET(14, app_category) OR  FIND_IN_SET(15, app_category) OR  FIND_IN_SET(26, app_category)) ");
        while (insideResultsSet.next()) 
        {
            mResultValues.put((String)(Reflection("Subdivision_of_land_" + RANGE_NAMES[EachMap.getKey()])),
                    insideResultsSet.getDouble("TotalAmount"));

            Fn.Out(insideResultsSet.getDouble("TotalAmount"));
            Fn.Out_Stop("SELECT COUNT(*) AS TotalAmount "
                    + mCurrentApplications
                    + " WHERE CurrentApplications.resp_id " + mResp_authority + " " + "AND "
                    + FIELD_FinalOutcome_date + " " + EachMap.getValue() + "AND (" + FIELD_FinalOutcome
                    + " >=1 AND " + FIELD_FinalOutcome + " <= " + FIELD_FinalOutComeORRAHighNumber + ") "
                    + getCommaSeachSQL_AppCategory_Multi(new int[]{14,15,26}));
        }

Fn.Out_Stop 查询工作 100%，但是当我直接输出结果时结果甚至无效。

结果为 0，对象类型为 null。谁能解释这里发生了什么？对我来说奇怪的错误，因为这对 400 多个其他查询都有效。

4

1 回答 1

1

列名可能不是"TotalAmount"。尝试使用索引 getter likegetLong(1)或在查询中的列名周围加上双引号以强制大小写：

"SELECT COUNT(*) AS \"TotalAmount\" ... "

如果不引用查询中的列名，数据库可以自由更改大小写。

于 2013-06-20T01:27:28.957 回答