我有这段代码用于将 CSV 文件上传到 MySQL,我尝试上传我创建的 CSV 文件,但运行代码时不断收到此错误。
我尝试运行的代码在这里:
Load Data Local Infile
'/Users/dylanpowell/Dropbox/Dylan Powell/Berkeley Investment Advisors/Dylans Stock Evaluations/Bottom Scores at 9-7-19.csv'
Into Table Stock_Evaluator_Raw_Scores
Fields Terminated by ','
Enclosed by '"'
Escaped by '\\'
Lines terminated by '\n'
Ignore 1 Lines;
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错误如下:
Error Code: 3948. Loading local data is disabled; this must be enabled on both the client and server side. Load Data Local Infile '/Users/dylanpowell/Dropbox/Dylan Powell/Berkeley Investment Advisors/Dylans Stock Evaluations/Bottom Scores at 9-7-19.csv'Into Table Stock_Evaluator_Raw_Scores Fields Terminated by ','Enclosed by …Run Code Online (Sandbox Code Playgroud) 我正在尝试执行动态sql选择我在使用参数从表中选择的位置.
SELECT null FROM @TableName
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但是我收到了错误must declare table variable @TableName.我怀疑这是因为我正在使用变量从表中进行选择.我以前不需要这样做.
List<SqlParameter> sqlParams = new List<SqlParameter>()
{
new SqlParameter("TableName", "testtable"),
new SqlParameter("FieldName", "testfield"),
new SqlParameter("Find", "testfind"),
};
string sqlSelect = "SELECT null FROM @TableName
WHERE @FieldName LIKE '%' + @Find + '%' ";
DataTable dtSelect = SqlHelper.ExecuteDataset(sqlConn, CommandType.Text,
sqlSelect, 30, sqlParams.ToArray()).Tables[0];
//30 = timeout
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如何使用动态sql执行上述操作?(请不要存储程序)
我们为什么要在我们的应用程序中使用sql helper类.sql helper类和simple class之间有什么区别.在哪种情况下应该使用sql Helper.请定义类的结构.