I have tried to find an answer for this elsewhere but cannot, I hope someone can help me.
I am trying to import the MySQL sample database into Oracle SQL Developer.
I have an existing database/connection I want to dump it into. I have created an empty table named classicmodels in my existing connection. Yes that name is only 1 table within the sample db, correct. Ignore the error in naming convention.
When I R-click on it and try 'import data' I cannot import a .sql file, I can only do it with XL, CSV, etc.
When I try and run a script it found on dba.stackexchange
#\path\mysqlsampledatabase.sql , I get a series of 'please provide substitution value' messages, which does not make sense to me given that I am importing a database which is built for SQL (ie what reason is there to substitute).
Pictures below:
The 'UnseenCollection' is a single table I imported as a csv file. I need to import the mysqlsampledatabase file such that it shows up the same way, I can access all tables within the sample db.
Anyone can help I would appreciate it. I need the end result to be the entire mysqlsampledatabase to populate within the 'classicmodels' node.
Thank you.
connect to MySQL
connect to Oracle
for a single MySQL table, right-click, 'Copy to Oracle'
for a few tables, select, drag and drop onto Oracle connection (requires newer version of SQL Developer)
for an entire MySQL database, use the migration project feature
Related
I have a .sql file from Oracle which contains create table/index statements and a lot of insert statements(around 1M insert).
I can manually modify the create table/index part(not too much), but for the insert part there are some Oracle functions like to_date.
I know MySql has a similar function STR_TO_DATE but the usage of the parameter is different.
I can connect to MySQL, but the .sql file is the only thing I got from Oracle.
Is there any way I can import this Oracle .sql file into MySQL?
Thanks.
Although the above job can be done by manually editing the script appropriately however there are products available which can be of use. Refer to the link for more information on one such product.
P.S. I am not affiliated in any way to the product
Since you mention about insert script basically i think you will be inserting data for this you can use any ETL tool, like open source tool like Pentaho data integrator, pretty simple to do, just search table to table transformation from different database connection on youtube to learn you should be able to connect to both mysql and oracle database else this wont help, but all the table structures you should create manually in the source database for data - you can just load it using ETL, no need to edit for every single line of insert if its more than 100 may be its very painful thing to do.
I have used database -> reverse engineer to retrieve the schema from phpmyadmin. But when I tried it, the data records that filled in table do not appear in mysql workbench. The things that appear is only the relation and the structure/attribute of the tables. What should I do so that the data records can be retrieve from phpmyadmin? Thank you
Try exporting the database in .sql
Select Database > Export > SQL > Go
You probably tried to reverse engineer the script in the modeling section, which creates a model from the content. A model doesn't work with the actual data, but only the meta data (schema objects and structure).
If you actually want to import the full dump into your server then open an SQL connection to it from the homescreen and execute the script there.
I have postponed writing SQL code for university, and now that I want to start learning it, I have no idea how to.
In C I'd define headers and begin with coding main, but in SQL classes all I have is a plain example
CREATE TABLE Sailors(
sid INTEGER,
sname VARCHAR(30) NOT NULL,
rating INTEGER DEFAULT 0,
age REAL DEFAULT 18
)
and some commands for using the table I created.
My questions are: How is a correct script supposed to look? How do I run it to create a database? (MySQL) How do I use MySQL to run scripts and where do I type commands in real time to do stuff I haven't scripted?
I just can't wrap my head around it. All tutorials I've seen use a terminal I can't find, or another I did find and I can't use because I get errors using any command (can't create file in some directory and some modules report errors so it shuts down)
The following is a very vague description of Mysql to get an idea of it:
Mysql (or SQL) is separated in 3 types of language:
DML : Data Manipulation Language
DDL : Data Definition Language
DCL : Data Control Language
Read about them to find out which kind of command belongs where.
You will find out that you almost exclusively need DML and DDL to work with Data in MySQL. While DCL is mostly used to keep the database running, control user privileges , etc.
Also when running code there will be only one command of your script executed at a time without a possibility to point somewhere else in your script.
Loops and Cursors can be used , but have to be stored in a special form of script called stored procedure. Usually you execute your code in a sequence without a code based relation between the different commands (the relation comes from the context of the commands).
Get Data into your Database:
(Consider installing the community edition for MySQL if you have problems running MySQL correctly)
To get Data into your Database , you should import data from files into your database. The MySQL-GUIs available (Workbench, Toad, Navicat, HeidSQL...) usually provide an Import Wizard that makes it easy to import Data from all kind of Files (txt, Excel, Database Files ..).
You can create an excel spreadsheet and import it into your database for example.
here is a picture of the Workbench SQL Editor:
https://dev.mysql.com/doc/workbench/en/images/wb-getting-started-tutorial-adding-data-movies.png
Workbench (or any other GUI) will be your IDE. Getting into it will answer many of your questions.
Regarding the correct script:
A complete MySQL command is called a query.
A Query is defined by a ; at the end (default) .
A chain of MySQL commands is called a script.
Therefore, a correct script consists of correct querys.
To solve more complex problems, use stored procedures in MySQL (this should come close to your usage of the word script).
some MYSQL commands you will have to be familiar with:
select
update
insert into
delete
create table
drop table
alter table
You have a lot to read. But make sure that your Database is running and you have some data in it to test code. As you already have programming experience, you should understand this really fast with the right setup.
I have a user table in Mysql. And this table is copied from another DB(Oracle).
Of course they have totally same table. And it needs to be updated once a day.(Mysql ← Oracle)
Is it possible to access Oracle and retrieve data within MYsql? I mean things like procedure.
(It seems possible between Mysql)
Or do I have to find other way?
Try to use Data Import tool in dbForge Studio for MySQL.
Start Data Import
Check ODBC format, specify its options and select table to import from
Specify mapping and other options
Select Append, Update or Append/Update import mode.
Also, you can run this tool in command line mode. Save data import template file and run it in command line mode once a day.
So I have this gigantic table, containing approx 7 million records, in MS Access (*.mdb), I want to transfer it into a much more workable MySQL format, and store it on my webserver. The file itself weighs 2GB.
The problem is, since the table is so large, it won't let me export it normally (Access says the limit is 65,536 records.)
I've tried some 3rd party software but to no avail.
Can anyone recommend a clean way of doing so, without damaging the data inside?
Thanks in advance for any help.
Install an ODBC driver for MySQL, if you don't have one already. The latest version is available here: Download Connector/ODBC
Create a DSN (Data Source Name) for your MySQL server from the Windows ODBC Data Source Administrator.
Then from Access 2003, select your table in the Database Window, and choose File->Export from Access' main menu. In the "Export Table 'yourtablename' To ..." dialog, select "ODBC Databases()" from the "Save as type" drop-down list (at the bottom of the dialog). The next dialog allows you to specify the name MySQL will use for the exported table, and it defaults to the Access table name. After you click OK, you will get another dialog, "Select Data Source", where you can select your DSN for MySQL. After you click OK on that dialog, you will probably get one more asking you for user name and password. Supply them, and click OK.
Hopefully your table will then transfer without errors. However, I've never done that operation with MySQL. It has worked for me with ODBC transfers to SQL Server and PostGreSQL. So I don't see why it wouldn't work with MySQL, too.
Also I've never attempted to export 7 million records in one go. If it chokes, we'll have to figure out a work-around.
If you're using Access 2007 instead of 2003, look for a similar option starting with the Export section of the ribbon.
I suggested this approach because my impression is this export will be a one-time deal, so I think the Access UI export method would be easiest. However, you can do essentially the same operation with VBA code using the DoCmd.TransferDatabase Method with your ODBC DSN.
Yet another alternative would be to create a compatible table structure in MySQL, create a link in Access to the MySQL destination table (using your DSN again), then run an "append query" from Access:
INSERT INTO link_to_mysql_table (field1, field2, field3, etc)
SELECT field1, field2, field3, etc
FROM access_table;
The append query approach could be useful in case the export chokes on 7 million records. You could add a WHERE clause to limit the SELECT query's output record set to a manageable chunk size, and then repeat with a different WHERE to specify another chunk.
Is that 7 million value after a compact + repair? I mean, if each record is about 120 chars in length, you can fit 32 million records in 2 gigs.
Also, I not aware of a limit of exporting 65,000 records, but only in regards to Excel.
So, you can/should be able to export the data to a csv, and then use a bulk text import in mySql to pull that data in. So, try exporting the table as csv. That should work.
I mean, you could link a table via odbc if you have a good local connection to the sql server, but if not, then I would export to csv (it is VERY fast). I would then zip the file (they zip fantastic). Upload file to server, and un-zip, and then use bulk text import. So, such a zipped file is VERY small and will save huge amounts of transfer time.
You can also consider using tab delimited as mySql also can import those, but a simple text file should work just fine.
I would use pyodbc as described in
http://en.wikibooks.org/wiki/Python_Programming/Database_Programming
download python 2.7 from
http://python.org/
download
http://code.google.com/p/pyodbc/
modify the following coede to set myfile.mdb and MyTable according to your table and file
save the code in a file translate.py
import csv
mycsv = csv.writer(open('result.csv', 'wb'), delimiter=',',
quotechar='"', quoting=csv.QUOTE_MINIMAL)
import pyodbc
DBfile = 'myfile.mdb'
conn = pyodbc.connect('DRIVER={Microsoft Access Driver (*.mdb)};DBQ='+DBfile)
cursor = conn.cursor()
SQL = 'SELECT * FROM MyTable;'
for row in cursor.execute(SQL): # cursors are iterable
mycsv.writerow(row)
cursor.close()
conn.close()
run python translate.py
Install MySQL on your own system and upsize to it rather than trying to use your local server. Then run an append query from your MySQL to the server instance.