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Sql convert string to int8/1/2023 ![]() ![]() INNER JOIN Sheet AS s ON s.LineID = j. Using (SqlDataReader reader = cmd.ExecuteReader()) CAST ( '195' AS int ) CONVERT ( int, '225' ) The string to int conversion can be useful where you are taking user input and want to convert that into column’s data type before using. Both these functions are little different to use. SqlParameter paramValue = new SqlDbType.Int) You may use SQL CAST and CONVERT functions for converting int to string and vice versa. SqlParameter paramColumn = new SqlDbType.NVarChar, 128) Using (SqlCommand cmd = new SqlCommand("GetAllLine", conn))Ĭmd.CommandType = CommandType.StoredProcedure Using (SqlConnection conn = new SqlConnection("YourConnectionString")) SYSDATETIME () implicitly converts to date style 21. GETDATE () implicitly converts to date style 0. For example, when a smallint is compared to an int, the smallint is implicitly converted to int before the comparison proceeds. WHERE ' + + N' = sp_executesql int', = static DataTable GetAll(string column, int value) SQL Server automatically converts the data from one data type to another. Tip: Also look at the CONVERT() function. INNER JOIN Sheet AS s ON s.LineID = s.LineID The CAST() function converts a value (of any type) into a specified datatype. In this case sales.pid has an implicit convertion on both queries since it's being compared to products.idn which has a different data type. INNER JOIN Line AS l ON l.LineID = j.LineID Query 1 worked because when you removed the N (which is used to convert a string to nvarchar) SQL Server didn't need to perform an implicit convertion of sales.type from varchar to nvarchar. You need to use dynamic SQL to build your query and insert the column names into the query. In a SQL stored procedure, you cannot directly pass a column name as a parameter to a query, because it will be treated as a string instead of an actual column name. You're passing the column name as a string to the stored procedure, and then trying to compare it to an integer value within the stored procedure causes a type conversion error. The problem is with the column name parameter you pass. How Should I Pass String Column with Int Value to this SP? If we provide a string that can be converted, the statement will succeed, as seen in the following example: DECLARE notastring INT SET notastring '1' SELECT notastring. I want use one query with different column name to pass to this SP.Īfter run get this error: Conversion failed when converting the nvarchar value 'j.LineID' to data type int. Because int has a higher precedence than varchar, SQL Server attempts to convert the string to an integer and fails because this string can't be converted to an integer. Dim MyInt, MyVar MyInt 4534 ' MyInt is an Integer. This example uses the CVar function to convert an expression to a Variant. MyString CStr(MyDouble) ' MyString contains '437.324'. Dim MyDouble, MyString MyDouble 437.324 ' MyDouble is a Double. ![]() SqlCommand cmd = new SqlCommand(query, Connection.Conn) Īnd my command btn : DataTable dt = Test.GetAll("j.LineID", 2) This example uses the CStr function to convert a numeric value to a String. Public static DataTable GetAll(string column, int value) Inner join Sheet as s on s.LineID=s.LineID Inner join Line as l on l.LineID =j.LineID one for column name another for it's value. I have a SP that join 3 table and I pass two parameters to it. I have a big problem with SP in sql server. ![]()
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