Develop Reference

ID value in mySQL is auto_increment but seems generated in netbeans

I'm fairly new to developing web apps in Java. I just connected the database, and as seen in the pictures, my ID_patient is auto_increment, but in Netbeans it looks generated.
INSERT INTO sys.patient values('5','elif','nil','er','elif#hotmail.com','11111111111','1234a','istanbul')
The new record inserted wants this value, while i want it to take
INSERT INTO sys.patient values('elif','nil','er','elif#hotmail.com','11111111111','1234a','istanbul')
and auto-increment and give the id as 1,2,3,4...etc.
how can I fix this?
thank you
in netbeans
in mysql

If you are expecting to create an insert query where you don't want to provide an id and the database should generate it automatically based on table defination then you need to create insert query where you have to mention columns names.
Example
INSERT INTO <TABLENAME>(COLUMN1, COLUMN2, COLUMN3, COLUMN4)
VALUES
(VALUE1,VALUE2, VALUE 3,VALUE 4);
So in ur case it should be
INSERT INTO PATIENT(FirstName,MiddleName,LastName,E_mail)
values
('myname','mymiddlename','mylastname','myemailid');
Sequence of column names and their values are very important. They should match exactly. If you don't provide a value for one of column and if its is auto increment, then DB will add an value to it else it will add null value.

ALTER TABLE ADD COLUMN WITH DEFAULT NULL

I have a table Facility header and i want to alter it and add few columns.I want the newly added columns to hold default value as null. My table is already loaded with 14 years of data .As it is partitioned table for year 2002-2014 by default the value of these newly added column should come null in the table .
create table facility_HEADER
(
A string,
B INT,
C INT
)partitioned by (year int comment 'Date Year Incurred')
STORED AS PARQUET
Alter Table Command
ALTER TABLE facility_HEADER add columns (MSCLMID Bigint,NPI STRING,UNITS decimal(10,2));
When i put a describe on the table i can see the columns got appended at the end .
When i put a select * from any of the partition it gives error.
Failed with exception
java.io.IOException:org.apache.hadoop.hive.ql.metadata.HiveException:
java.lang.ClassCastException: org.apache.hadoop.io.IntWritable cannot
be cast to org.apache.hadoop.io.LongWritable
My table is having 14 years of data and i don't want it to be done with putting null into select clause and giving aliases.
I tried the things referring from here and from here.
Can any one help me what actually happened with my table .I lost 14 years of data in a go.

Make a full files backup first. Try to alter table and drop newly added columns. If you didn't write into table yet, it should work. Check the table is selectable again. Then create new table with new columns and insert overwrite into.

Using alter command on hive it just changed metadata not under laying data so while select * from table will fail.
As hive is trying to extract data from file stored "/apps/hive/warehouse/databasename.db/tablename/" using using row_format and file_format it will not able to find column values as described on row_format .
Note : Data is STORED AS PARQUET hive is not getting definition of new column on PARQUET
work around: create new table and insert data and rename table as oldtablname
INSERT INTO TABLE
selet columns(old) null as MSCLMID ,null as NPI, null as UNITS from oldtabel

How to get column from other tables, to form a new table?

I'm relatively new to working with JDBC and SQL. I have two tables, CustomerDetails and Cakes. I want to create a third table, called Transactions, which uses the 'Names' column from CustomerDetails, 'Description' column from Cakes, as well as two new columns of 'Cost' and 'Price'. I'm aware this is achievable through the use of relational databases, but I'm not exactly sure about how to go about it. One website I saw said this can be done using ResultSet, and another said using the metadata of the column. However, I have no idea how to go about either.

What you're probably looking to do is to create a 'SQL View' (to simplify - a virtual table), see this documentation
CREATE VIEW view_transactions AS
SELECT Name from customerdetails, Description from cakes... etc.
FROM customerdetails;
Or something along those lines
That way you can then query the View view_transactions for example as if it was a proper table.
Also why have you tagged this as mysql when you are using sqlite.

You should create the new table manually, i.e. outside of your program. Use the commandline 'client' sqlite3 for example.
If you need to, you can use the command .schema CustomerDetails in that tool to show the DDL ("metadata" if you want) of the table.
Then you can write your new CREATE TABLE Transactions (...) defining your new columns, plus those from the old tables as they're shown by the .schema command before.
Note that the .schema is only used here to show you the exact column definitions of the existing tables, so you can create matching columns in your new table. If you already know the present column definitions, because you created those tables yourself, you can of course skip that step.
Also note that SELECT Name from CUSTOMERDETAILS will always return the data from that table, but never the structure, i.e. the column definition. That data is useless when trying to derive a column definition from it.
If you really want/have to access the DB's metadata programatically, the documented way is to do so by querying the sqlite_master system table. See also SQLite Schema Information Metadata for example.

You should read up on the concept of data modelling and how relational databases can help you with it, then your transaction table might look just like this:
CREATE TABLE transactions (
id int not null primary key
, customer_id int not null references customerdetails( id )
, cake_id int not null references cakes( id )
, price numeric( 8, 2 ) not null
, quantity int not null
);
This way, you can ensure, that for each transaction (which is in this case would be just a single position of an invoice), the cake and customer exist.
And I agree with #hanno-binder, that it's not the best idea to create all this in plain JDBC.

insert into a local table from a distant table in Oracle

i would like to insert into a local table (in a local database), all the rows from a distant table. here's what i'm looking for :
insert into LocalTable (Column1,Column2,...,ColumnN) values (select * from DistantTable);
does anybody knows how could i do this (if there is a way)??
i'm aweare that there is a way using a java program, by copying the DistantTable rows in a file, then extracting those rows using a StringTokenizer then putting them to LocalTable. but it would be really good if i can perform this using only SQL queries.

You can create a database link in the local database, pointing at the remote database, and then type:
INSERT INTO LocalTable SELECT * FROM RemoteTable#DBLink;

Retrieving a row and column from Access Database

In my project are two matrices using Microsoft Access database, sourced from two different tables (for example TABLE_A and TABLE_B). I need to retrieve a row and a column from that database.
Selecting COL1 from one table means selecting a corresponding row from the other.
I would like to retrieve COL1 and the corresponding row at the same time.
How is this possible using SQL and a JDBC call?
Thank you!

In order to work with two separate tables of the same database you will need one Connection and a Statement and a ResultSet for each database table.
Since you do not clarify how you have stored your matrix data in the database i can not give you more details here. But, whatever you do, in order to access the contents of the first matrix from the database table you will have to replicate for the second. Just change the table name in your SQL select.
However it will not happen "at the same time", one query will follow the other.