You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '= 1' at line 1

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Pls Help me in Finding the error.
Thanks in advance

C#

string qry = "select * from " + tableName + "where campaignid= " + campaignid;
           ds = MySqlHelper.ExecuteDataset(GetConnectionString(), qry);
           if (ds != null && ds.Tables.Count > 0 && ds.Tables[0].Rows.Count > 0)
           {
               Control.DataSource = ds;
               Control.DataTextField = lstText;
               Control.DataValueField = lstValue;
               Control.DataBind();
           }

Posted 24-Nov-12 20:45pm

pankajgarg1986

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pankajgarg1986 25-Nov-12 3:04am

it is solved and answer is:-
string qry = "select * from " + tableName + "where campaignid='" + campaignid + "'";

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OriginalGriff · Answer 1 · 2012-11-24T20:52:00

The most likely reason is that your tablename does not end with a space - so it will get run together with the "where" to form a new name:

SQL

SELECT * FROM myTablewhere campaignid= 1

Try adding a space to your code:

C#

string qry = "select * from " + tableName + "where campaignid= " + campaignid;

Becomes

C#

string qry = "select * from " + tableName + " where campaignid= " + campaignid;

But it is not a good idea to do that anyway: Do not concatenate strings to build a SQL command. It leaves you wide open to accidental or deliberate SQL Injection attack which can destroy your entire database. Use Parametrized queries instead.

BTW: It is also poor form to use SELECT * FROM - it may return data you don't want or need such as image data. It is much better practice to explicitly list the fields you want, in the order you want them.