my first time in eclipse and im trying to get some test data from my sql server,now the problem is i have setup a sql connection using ms jdbc drivers and it seems like it works but when i run my query from eclipse,i get
com.microsoft.sqlserver.jdbc.SQLServerException: Invalid column name
'KategoriName'.
error.My query works fine in sql manager.What could be the problem?I'm adding the code below as well:
String connectionString = "jdbc:sqlserver://192.168.0.155;user=user;password=password";
Connection conn= DriverManager.getConnection(connectionString);
Statement stmt = conn.createStatement();
ResultSet rs;
String sqlconn="select [KategoriName] from [FINSAT6G9].[TBL_Test] whereID=493";
rs = stmt.executeQuery(sqlconn);
String aa = rs.getString("KategoriName");
System.out.println(aa);
Cheers.
Try including the database name in the connection string as so:
String connectionString = "jdbc:sqlserver://192.168.0.155;user=user;password=password;databaseName=FINSAT6G9";
Because, obviously, the error is telling you that the KategoriName column doesn't exist which can only mean 2 things: You have a typo or you are attempting to get the data from the wrong place, either the wrong database or the wrong table.
Related
I am having this problem,
When I send an SQL query as an argument it gives error
when I use the same query directly in my java program it works fine.
MY SQL query when I send as an argument is as follow
Select RATINGPERIOD from INVESTMENT.I1INVE Where INVESTMENTID = 100
rs = stmt.executeQuery(sqlQery); // Select RATINGPERIOD from INVESTMENT.I1INVE Where INVESTMENTID = 100
and when I use it directly into my java program is as follow
try
{
// Load the driver
Class.forName("com.ibm.db2.jcc.DB2Driver");
System.out.println("**** Loaded the JDBC driver");
// Create the connection using the IBM Data Server Driver for JDBC and SQLJ
con = DriverManager.getConnection (url, user, password);
// Create the Statement
stmt = con.createStatement();
System.out.println("**** Created JDBC Statement object");
// Execute a query and generate a ResultSet instance
rs = stmt.executeQuery("Select RATINGPERIOD from INVESTMENT.I1INVE where INVESTMENTID = 100");
while (rs.next()) {
delay = rs.getString("RATINGPERIOD");
System.out.println("size of list ="+delay);
}
}
Error log
com.ibm.db2.jcc.am.SqlException: [jcc][10103][10941][3.62.57] Method executeQuery cannot be used for update. ERRORCODE=-4476, SQLSTATE=null
at com.ibm.db2.jcc.am.fd.a(fd.java:660)
at com.ibm.db2.jcc.am.fd.a(fd.java:60)
at com.ibm.db2.jcc.am.fd.a(fd.java:120)
at com.ibm.db2.jcc.am.jn.a(jn.java:4129)
at com.ibm.db2.jcc.am.jn.a(jn.java:2875)
at com.ibm.db2.jcc.am.jn.a(jn.java:679)
at com.ibm.db2.jcc.am.jn.executeQuery(jn.java:663)
at com.profitsoftware.testing.utils.keywords.date.DatabaseSQL.sqlQuery(DatabaseSQL.java:46)
at com.profitsoftware.testing.utils.keywords.date.DatabaseSQLKeywords.executeSqlQuery(DatabaseSQLKeywords.java:18)com.
ok some more information, I have assigned sql query to a string in Java program and then compared it to the query(String) I was getting as argument in my java program and it gives false. which explain maybe when query is passed from RIDE to Java programm it changes somehow. any idea what happens there ?
Thanks in advance and sorry if it sounds a stupid question, I a new to this programming world.
oK, It started to work, actually I was missing something there, so type. My logic itself was good but it was typo that created the problem
--Sara
I am trying to get Generated key from sequnce.(Using Servlets & Oracle10)
Following is my code:
query ="insert into TABLE_NAME(COL1,COL2,COL3) values(sysdate,?,SEQ_NAME.nextval)";
PreparedStatement pstmt = con.prepareStatement(query,new String[]{"COL3"}); //Getting error on this line
pstmt.setString(1,Str2);
pstmt.executeUpdate();
ResultSet keyset = pstmt.getGeneratedKeys();
if(keyset.next())
{
genKey = keyset.getString(1);
}
But I am getting the Exception:
java.sql.SQLException: Unsupported feature
Few days ago this code was working fine. So what might be the reason that this code is not working now? (I haven't changed the JDBC driver war file)
Thanks in advance.
Is there another way of getting the value generated by sequence in the query?
Download the latest JDBC drivers, I think you need at least the 10.2.0.1 drivers and the db also need to be 10.2+
http://www.oracle.com/technology/software/tech/java/sqlj_jdbc/htdocs/jdbc101040.html
or first get the sequence value
String sqlForSeq = "select SEQ_NAME.NEXTVAL from dual";
ResultSet rs = stmt.executeQuery(sqlForSeq);
if (rs.next()) {
logSeq = rs.getString("NEXTVAL");
}
I am trying to retrieve data from MySQL database using eclipse.I am using the same code of JDBC as for a java application...but it does work.
You can do as follows:
Class.forName("com.mysql.jdbc.Driver"); // Setup the connection with the DB
connect = DriverManager.getConnection("jdbc:mysql://localhost/database_name", username,password);
// Statements allow to issue SQL queries to the database ; that's why we need to create one.
statement = connect.createStatement();
// Result set get the result of the SQL query
resultSet = statement.executeQuery("select * from TableName;");
while (resultSet.next()) { //retrieve data
String data = resultSet.getString("column_name");
...
}
Please make sure that your database connection is created successfully then apply queries to retrieve data from database. If your connection is not created then you need to check you driver setting or mysql password setting.
Class.forName("com.mysql.jdbc.Driver");
Connection con=DriverManager.getConnection("jdbc:mysql://localhost/database_name",username,password");
Connection class having method like 'createstatement()', with help of this we can query from database.
Statement statement = con.createstatement();
resultSet=statement.executeQuery("select * from tablename");
And finally retrive the data from the 'resultSet' object.
I have been assigned a task at work but i'm a beginner in Java and Eclipse.
I have to re-use an existing programm and modify some parts of it.
The following part does'nt work:
private java.sql.Connection conn;
private final String sqlRequest = "select ... from ...";
//................
private void DBConnect(){
try {
// Load the driver
java.lang.Class.forName(jdbcdriver).newInstance();
// Connect to database
conn = java.sql.DriverManager.getConnection(jdbcURL,dbuser,dbpwd);
//................
private void search2() {
try {
// create SQL statement
java.sql.Statement stmt = conn.createStatement(); //my line 135
java.sql.ResultSet rs = execRequest(stmt,sqlRequest);
//................
The error message in eclipse is :
"java.lang.NullPointerException at mon_prog.search2(mon_prog.java:135)"
This part used to work before... so is the problem due to my JDK version? I have JDK7u2
Get the connection first ...using..
Connection conn = DriverManager.getConnection(connection string);
Your conn seems null.
Have a look into great Vogella tutorial on how to connect to MySQL database from java program (IDE neutral way): http://www.vogella.de/articles/MySQLJava/article.html
Example steps to connect to your database:
// This will load the MySQL driver, each DB has its own driver
Class.forName("com.mysql.jdbc.Driver");
// Setup the connection with the DB
connect = DriverManager
.getConnection("jdbc:mysql://localhost/feedback?"
+ "user=sqluser&password=sqluserpw");
// Statements allow to issue SQL queries to the database
statement = connect.createStatement();
// Result set get the result of the SQL query
resultSet = statement
.executeQuery("select * from FEEDBACK.COMMENTS");
Set breakpoints on the Class.forName() and getConnection() calls in DBConnect(), and on your line 135, then run it all through the debugger. I wouldn't be the least bit surprised if getConnection() doesn't get executed before you try to use the connection. (Been there, done that, got the source control commit.)
If that's not it, you may also want to double-check that you really don't have another variable that is shadowing your intended conn instance. "Go to definition" is very useful for this; just make sure you end up in the expected place.
I'm trying to connect netbeans to my postgresql database. The connection seems to have worked as I don't get any errors or exceptions when just connecting, methods such as getCatalog() also return the correct answers.
But when I try to run a simple SQL statement I get the error "ERROR: relation "TABLE_NAME" does not exist", where TABLE_NAME is any one of my tables which DO exist in the database. Here's my code:
Statement stmt = con.createStatement();
ResultSet rs;
String query = "SELECT * FROM clients";
rs = stmt.executeQuery(query);
I was thinking that netbeans might not be finding the tables because it's not looking in the default schema (public), is there a way of setting the schema in java?
EDIT: My connection code. The database name is Cinemax, when I leave out the statement code, I get no errors.
String url = "jdbc:postgresql://localhost:5432/Cinemax";
try{
try {
Class.forName("org.postgresql.Driver");
} catch (ClassNotFoundException cnfe) {
System.err.println("Couldn't find driver class:");
cnfe.printStackTrace();
}
Connection con = DriverManager.getConnection( url,"postgres","desertrose147");
I suspect you created the table using double quotes using e.g. "Clients" or some other combination of upper/lowercase characters and therefor the table name is case sensitive now.
What does the statement
SELECT table_schema, table_name
FROM information_schema.tables
WHERE lower(table_name) = 'clients'
return?
If the table name that is returned is not lowercase you have to use double quotes when referring to it, something like this:
String query = "SELECT * FROM \"Clients\"";
You could check these possibilities:
String query = "SELECT * FROM clients";
String query = "SELECT * FROM CLIENTS";
String query = "SELECT * FROM \"clients\"";
String query = "SELECT * FROM \"CLIENTS\"";
String query = "SELECT * FROM Clients";
Maybe one of those would work.
Besides CoolBeans' suggestion, you may also be connecting to the db as a different user who does not have permission on the relevant db or schema. Can you show the connection string?
Funny thing is i was experiencing the same thing as i had just started on netbeans and postgressql db, and the error was fixed after noting that the issue was that my tables in postgressql had capital letters in my naming convention which me and my jdbc query statement for INSERT was failing to find the table. But after renaming my tables in the db and fixing the column names as well am good to go. Hope it helps.