System Data SqlClient SqlException

Question

I have to execute an updating query :

 using (SqlCommand sqlCmd = new SqlCommand("UPDATE  Test SET Testedpiece = Testedpiece + 1 and Rate = (Testedpiece  * 100) / Totalpiece  WHERE IDSuperlot = @super", connexion))

But i have this error System.Data.SqlClient.SqlException (0x80131904): Incorrect syntax near the keyword 'and'.

I don't know why this error appears and how can i fix it

1. What is the Sql Syntax error?
2. How can i fix it?

Answer 1

Your sql command starts like this:

UPDATE  Test SET Testedpiece = Testedpiece + 1 and Rate = ...

change it to this:

UPDATE  Test SET Testedpiece = Testedpiece + 1, Rate = ...