Question

我打算根据参加者的等级给积分。例如，位置1应该给32点，位置2应该给31点，位置3应该给30点，依此类推... 结果没有来。对于任何位置，它仅返回“ 1”。查询可能出什么问题？注意：该查询在SQLExpress上运行良好，但是当我在SQLite中使用该查询时，对于参与者的所有位置它只会返回1。这是我的SQLiteCommand查询：

cn.Open();
SQLiteCommand cmd3 = new SQLiteCommand("INSERT INTO PARTICIPANT5(NAMES,SCHOOL,TYPE,TITLE,YEAR,TOTAL,POSITION,POINTS) SELECT  DISTINCT NAMES,SCHOOL,TYPE,TITLE ,YEAR,SUM(AVG) AS TOTAL, RANK()OVER (ORDER BY SUM(AVG) DESC) AS POSITION , CASE WHEN RANK()OVER (ORDER BY SUM(AVG) DESC)='1' THEN '32' WHEN RANK()OVER (ORDER BY SUM(AVG) DESC)='2' THEN '31' WHEN RANK()OVER (ORDER BY SUM(AVG) DESC)='3' THEN '30' WHEN RANK()OVER (ORDER BY SUM(AVG) DESC)='4' THEN '29' WHEN RANK()OVER (ORDER BY SUM(AVG) DESC)='5' THEN '28' WHEN RANK()OVER (ORDER BY SUM(AVG) DESC)='6' THEN '27' WHEN RANK()OVER (ORDER BY SUM(AVG) DESC)='7' THEN '26' WHEN RANK()OVER (ORDER BY SUM(AVG) DESC)='8' THEN '25' WHEN RANK()OVER (ORDER BY SUM(AVG) DESC)='9' THEN '24'  WHEN RANK()OVER (ORDER BY SUM(AVG) DESC)='10' THEN '23' WHEN RANK()OVER (ORDER BY SUM(AVG) DESC)='11' THEN '22' WHEN RANK()OVER (ORDER BY SUM(AVG) DESC)='12' THEN '21'  WHEN RANK()OVER (ORDER BY SUM(AVG) DESC)='13' THEN '20' WHEN RANK()OVER (ORDER BY SUM(AVG) DESC)='14' THEN '19' WHEN RANK()OVER (ORDER BY SUM(AVG) DESC)='15' THEN '18'  WHEN RANK()OVER (ORDER BY SUM(AVG) DESC)='16' THEN '17' WHEN RANK()OVER (ORDER BY SUM(AVG) DESC)='17' THEN '16' WHEN RANK()OVER (ORDER BY SUM(AVG) DESC)='18' THEN '15' WHEN RANK()OVER (ORDER BY SUM(AVG) DESC)='19' THEN '14' WHEN RANK()OVER (ORDER BY SUM(AVG) DESC)='20' THEN '13' WHEN RANK()OVER (ORDER BY SUM(AVG) DESC)='21' THEN '12'  WHEN RANK()OVER (ORDER BY SUM(AVG) DESC)='22' THEN '11' WHEN RANK()OVER (ORDER BY SUM(AVG) DESC)='23' THEN '10' WHEN RANK()OVER (ORDER BY SUM(AVG) DESC)='24' THEN '9' WHEN RANK()OVER (ORDER BY SUM(AVG) DESC)='25' THEN '8' WHEN RANK()OVER (ORDER BY SUM(AVG) DESC)='26' THEN '7' WHEN RANK()OVER (ORDER BY SUM(AVG) DESC)='27' THEN '6' WHEN RANK()OVER (ORDER BY SUM(AVG) DESC)='28' THEN '5' WHEN RANK()OVER (ORDER BY SUM(AVG) DESC)='29' THEN '4' WHEN RANK()OVER (ORDER BY SUM(AVG) DESC)='30' THEN '3' WHEN RANK()OVER (ORDER BY SUM(AVG) DESC)='31' THEN '2' ELSE '1' END POINTS FROM Average WHERE YEAR='" + textBox15.Text + "' AND CATEGORY = '" + textBox1.Text + "' GROUP BY NAMES,SCHOOL,TYPE,TITLE,YEAR  ", cn);
int count3 = cmd3.ExecuteNonQuery();
cn.Close();

谢谢！

Answer 1

我找到了问题所在。现在它就像一种魅力！ SQLite无法理解查询中的单引号... 我只是删除了所有单引号。这就是它的样子。尝试 { cn.Open（）; SQLiteCommand cmd3 =新的SQLiteCommand（“ INSERT INTO PARTICIPANT5（NAME，SCHOOL，TYPE，TITLE，YEAR，TOTAL，POSITION，POINTS）选择不同的名称，SCHOOL，TYPE，TITLE，YEAR，SUM（AVG）作为TOTAL，RANK（）OVER （按SUM（AVG）DESC排序），当RANK（）超过（按SUM（AVG）DESC排序）= 1则为32，当RANK（）超过（按SUM（AVG）DESC排序）为2，则为31时RANK（）OVER（按SUM（AVG）DESC排序）= 3，则30则RANK（）OVER（按SUM（AVG）DESC排序）= 4，然后，RANK（）OVER（按SUM（AVG）DESC排序）= 29 5 THEN 28当RANK（）超过（按SUM（AVG）DESC排序）= 6 THEN 27 WHEN RANK（）超过（按SUM（AVG）DESC排序）= 7 THEN 26当RANK（）超过（按SUM（AVG）DESC排序）= 7 ）DESC）= 8然后RANK（）OVER（按SUM（AVG）DESC排序）时25然后THER 24当RANK（）OVER（按SUM（AVG）DESC排序）= 10然后THEN 23当RANK（）OVER（按ORDER命令）按SUM（AVG）DESC）= 11则22 RANK（）超过（按SUM（AVG）DESC的顺序）= 12 THEN 21当RANK（）OVER（按SUM（AVG）DESC的顺序）= 13那么20 RANK（））OVER（按SUM（AVG）DESC排序）= 14然后在RANK（）OVER（按SUM（AVG）DESC排序）= 19时15 THEN 18当RANK（）超过（按SUM（AVG）DESC命令）= 16 THEN 17 WHEN RANK（）超过（按SUM（AVG）DESC命令）= 17 THEN 16当RANK（）超过（按SUM（AVG）DESC命令）= 17 ）DESC）= 18然后15（当RANK（）超过（按SUM（AVG）DESC排序））= 19 THEN 14当RANK（）超过（按SUM（AVG）DESC排序）= 20 THEN 13当RANK（）超过（ORDER（排序）按SUM（AVG）DESC）= 21然后在RANK（）超过时排序（按SUM（AVG）DESC排序）= 22 THEN 11当RANK（）超过（按SUM（AVG）DESC排序）时= 23然后则当RANK（）排序时）OVER（按SUM（AVG）DESC排序）= 24 THEN RANK（）OVER（按SUM（AVG）DESC排序）= 25 THEN 9当RANK（）OVER（按SUM（AVG）DESC排序）= 26 THEN 7当RANK（）超过（按SUM（AVG）DESC排序）= 27然后6当RANK（）超过（按SUM（AVG）DESC排序）= 28然后5当RANK（）超过（按SUM（AVG）DESC排序））= 29则当RANK（）超过（按SUM（AVG）DESC排序）时= 4 THEN 3则当RANK（）超过（按SUM（AVG）DESC排序）的THEN 3 =然后THEN 2 ELSE 1结束点从平均年份= '“ + textBox15.Text +”'AND CATEGORY ='“ + textBox1.Text +”'GROUP BY NAMES，SCHOOL，TYPE，TITLE，YEAR“，cn）; int count3 = cmd3.ExecuteNonQuery（）; cn.Close（）;

            }

            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }

SQLite是否支持CASE WHEN查询？

1 个答案: