Question

我的代码中出现了以下语句的语法错误，我已经完成了它，除非我错过了一些内容，否则我看不出任何错误：

错误是

关键字RIGHT“
附近的语法不正确

("SELECT D1.DR, D1.CR, D1.ASSET_NO, (Coalesce(addit_ytd,0) + DR - CR) AS ADDIT_YTD"
+"FROM (SELECT coalesce (sum(dr_amount),0) AS DR, coalesce (sum(cr_amount),0) AS CR , asset.asset_no" 
+"FROM posting RIGHT JOIN asset ON asset.asset_no = posting.asset_no, sysasset" 
+"WHERE asset.asset_no = @AssetNumber" 
+"AND (period <= posting.period) AND (period >= sysasset.asset_open_per)" 
+ "GROUP BY asset.asset_no) AS D1 INNER JOIN dbo.asset ON D1.asset_no= asset.asset_no", DataAccess.AssetConnection);

Answer 1

正如其他人所说，你缺少空白。考虑重写代码以使用C＃的逐字文字字符串语法，并在其中添加一些缩进以更好地指示查询的结构：

(@"SELECT D1.DR, D1.CR, D1.ASSET_NO, (Coalesce(addit_ytd,0) + DR - CR) AS ADDIT_YTD
FROM 
    (SELECT coalesce (sum(dr_amount),0) AS DR, coalesce (sum(cr_amount),0) AS CR ,     asset.asset_no
    FROM posting RIGHT JOIN asset ON asset.asset_no = posting.asset_no, sysasset
    WHERE asset.asset_no = @AssetNumber
    AND (period <= posting.period) AND (period >= sysasset.asset_open_per)
    GROUP BY asset.asset_no) 
AS D1 INNER JOIN dbo.asset ON D1.asset_no= asset.asset_no",         
DataAccess.AssetConnection);

请参阅，@符号表示“直接从源代码中取出字符串”。源代码中的所有空格都成为字符串中的空格。

Answer 2

错误是在串联期间的字符串。您需要在列之后或FROM子句

之前有额外的空格

("SELECT D1.DR, D1.CR, D1.ASSET_NO, (Coalesce(addit_ytd,0) + DR - CR) AS ADDIT_YTD" +
" FROM (SELECT coalesce (sum(dr_amount),0) AS DR, coalesce (sum(cr_amount),0) AS CR , asset.asset_no" +
" FROM posting RIGHT JOIN asset ON asset.asset_no = posting.asset_no, sysasset" +
" WHERE asset.asset_no = @AssetNumber" +
" AND (period <= posting.period) AND (period >= sysasset.asset_open_per)" + 
" GROUP BY asset.asset_no) AS D1 INNER JOIN dbo.asset ON D1.asset_no= asset.asset_no", DataAccess.AssetConnection); 
 ^ << for clarity add extra space here

如果您不添加额外空间，则会将select语句解析为

... (Coalesce(addit_ytd,0) + DR - CR) AS ADDIT_YTDFROM (SELECT coalesce
                                                  ^ causes syntax error

Answer 3

您在每行之间缺少空格字符：

... ADDIT_YTD" +
"FROM ( ...

变为

... ADDIT_YTDFROM ( ...

等

仅仅因为您的来源中有换行符，并不意味着这些换行符会显示在您构建的文本中。（另一方面，在它不是语法正确的SQL之前，我对它到底有多远（显然是在第3行的中间）留下了深刻的印象。

Answer 4

除了所有其他答案之外，我还会指出，通常当我有任何进入生产代码的SQL时，我通常会将其作为资源包含在内，而不是在内部硬编码c＃代码。这使您可以在多个位置重用SQL代码，并且还可以在需要编辑时更轻松地读取SQL代码。

错误：关键字附近的语法不正确

4 个答案: