Syntax Error with mysql in java

Question

I don' t understand why eclipse tell me this error for this query:

ResultSet rs = st.executeQuery("select * from '"+ value3+ "' where Name='" + value1 + "' and Password='"+ value2 + "'");

error:

com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: 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 ''f' where Name='f' and Password='f'' at line 1

Answer 1

1) Try this.

ResultSet rs = st.executeQuery("select * from `" + value3 + "` where Name='" +
               value1 + "' and Password='"+ value2 + "'");

See here:
MySQL Identifiers

The identifier quote character is the backtick ("`") in MySQL.

2) Also, as you're not using PreparedStatement, if your Name or
Password contains ' you will have issues. Your code is vulnerable
to SQL injection.

See also:
PreparedStatement
SQL injection