Question

添加sql内连接时出现错误这是错误

抛出异常：＆＃39; System.Data.SqlClient.SqlException＆＃39;在System.Data.dll中 System.Data.SqlClient.SqlException（0x80131904）：＆＃39; SellingDetail＆＃39;附近的语法不正确。在System.Data.SqlClient.SqlConnection.OnError（SqlException异常，Boolean breakConnection，Action 1 wrapCloseInAction) at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection, Action 1 wrapCloseInAction）在System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning（TdsParserStateObject stateObj，Boolean callerHasConnectionLock，Boolean asyncClose）在System.Data.SqlClient.TdsParser.TryRun（RunBehavior runBehavior，SqlCommand cmdHandler，SqlDataReader dataStream，BulkCopySimpleResultSet bulkCopyHandler，TdsParserStateObject stateObj，Boolean＆amp; dataReady）在System.Data.SqlClient.SqlCommand.RunExecuteNonQueryTds（String methodName，Boolean async，Int32 timeout，Boolean asyncWrite）在System.Data.SqlClient.SqlCommand.InternalExecuteNonQuery（TaskCompletionSource`1完成，String methodName，Boolean sendToPipe，Int32 timeout，Boolean＆amp; usedCache，Boolea＆＃39; Lks_itSoftware.vshost.exe＆＃39;（CLR v4.0.30319：Lks_itSoftware.vshost .exe）：已加载＆＃39; C：\ Windows \ Microsoft.Net \ assembly \ GAC_MSIL \ System.Runtime.Caching \ v4.0_4.0.0.0__b03f5f7f11d50a3a \ System.Runtime.Caching.dll＆＃39;。跳过加载符号。模块已经过优化，启用了调试器选项“Just My Code”。＆＃39; Lks_itSoftware.vshost.exe＆＃39; （CLR v4.0.30319：Lks_itSoftware.vshost.exe）：已加载＆＃39; C：\ Windows \ Microsoft.Net \ assembly \ GAC_MSIL \ System.Numerics \ v4.0_4.0.0.0__b77a5c561934e089 \ System.Numerics.dll＆＃39 ;。跳过加载符号。模块已经过优化，调试器选项“Just My Code＆＃39;已启用。 n asyncWrite，Boolean inRetry）在System.Data.SqlClient.SqlCommand.ExecuteNonQuery（）在E：\ Zuhdan \ Sekolah \ LKS \ Lks_itSoftware \ Lks_itSoftware \ InputSellingForm.cs中的Lks_itSoftware.InputSellingForm.showData（）：第44行 ClientConnectionId：ddcfb16a-208C-40c0-be48-b3a296ef673c 错误号码：102，状态：1，等级：15

这是我的代码

tring query =  "SELECT Food.FoodName, SellingDetail.Qty, Food.Price, SellingDetail.Price AS Expr1" +
                        "FROM ((SellingDetail INNER JOIN" +
                        "Food ON SellingDetail.FoodId = Food.Foodid)INNER JOIN" +
                        "SellingHeader ON SellingDetail.SellingId = SellingHeader.SellingId)INNER JOIN(" +
                        "Employee ON SellingHeader.EmployeeId = Employee.EmployeeId)";

Answer 1

如果你做了一些基本的故障排除 - 打印字符串 - 你会发现你需要在每个结束报价前加一个空格。即

string query =  "SELECT Food.FoodName, SellingDetail.Qty, Food.Price, 
 SellingDetail.Price AS Expr1 " +
            "FROM ((SellingDetail INNER JOIN " +
            "Food ON SellingDetail.FoodId = Food.Foodid)INNER JOIN " +
            "SellingHeader ON SellingDetail.SellingId = 
 SellingHeader.SellingId)INNER JOIN(" +
            "Employee ON SellingHeader.EmployeeId = Employee.EmployeeId)";

Erro语法Sql使用sql server加入c＃

1 个答案: