In Oracle SQL Developer, there's a "SQL" tab for each table. This tab contains most of the SQL code (CREATE TABLE, CREATE TRIGGER, etc) that's needed to recreate the table.
Is this information available programatically from the database system, or is this an application feature of SQL Developer? If the former, what commands/statements would I need to run to retrieve this information? If the later, are there any clever ways to get SQL Developer to export these statements?
If you are using Oracle 9i+ then you are looking for the DBMS_METADATA package. http://download.oracle.com/docs/cd/B10500_01/appdev.920/a96612/d_metada.htm. It will allow you to extract whatever DDL you want.
If you are looking for more specific information there is a whole host of views you can access for specific data elements similar to the ones given by #Quassnoi.
There are lots of information, but here are the main queries:
SELECT *
FROM dba_tables
SELECT *
FROM dba_tab_columns
SELECT *
FROM dba_ind_columns
To see what SQL Developer actually outputs, enable trace for all sessions with a LOGON TRIGGER and look into the trace file created by SQL Developer's internal session.
You are looking for the DDL of your database objects.
You can use the Oracle bundled DBMS_METADATA package to get it, from any PL/SQL prompt, with the GET_DDL function.
I use TOAD vs Oracle SQL Developer.
When I click on a "Script" tab when viewing an object (like a table) TOAD executes a whole host of queries and then compiles the "script" from the output of all of these queries.
dba_tables
dba_tab_columns
dba_ind_columns
...
I think replicating this functionality would be a tedious task.
Related
Oracle SQL Developer is able to export DDL through Tools -> Database Export... This works very well, but requires manual intervention.
I know of DBMS_METADATA.get_ddl(), what I want to do is save the generated DDL in client machine which I use to connect to the Oracle DB using Oracle SQL Developer, this can be done manually.
But, I am looking for an automatic/scriptable way to export (save to local machine) DDL identical to what is exported through the manual way.
This is the SQL command I used to get DDL.
select dbms_metadata.get_ddl('obJType','ObjName','Schema') from dual;
How can I do that?
You can use spool and dbms_output.put_line to spool the results to your local machine.
You can see the link for an example utl-file-saving-in-local-machine spooling and tweak the same as per your requirement.
I have a stored procedure function as well as table in the SQL Server enterprise 2014. I also have data in the table. Now I need same table and data in PostgreSql(pgAdmin4).
Can anyone suggest to me the idea to migrate data to POSTGRESQL or any idea on creating the SQL script so that I can use psql to run the script?
Depending on how much data you have, you could script out the table and data. Then you could tweak the script as needed for PostgreSQL:
Right click on the SQL database > Tasks > Generate Scripts
On the "Choose Objects" screen, select your specific table then select "Next>"
On the "Set Scripting Options" screen, select "Advanced"
Find the option called "Types of data to script", then select "Schema and data" and select "OK"
Set the filename and continue through the dialog until the file is generated
Tweak the sql script for any specific PostgreSQL syntax
If there is a larger amount of data, you might look into some type of data transfer tool like SSIS.
Exporting the table structure and data as Josh Jay describes will likely require some fixes where the syntax doesn't match, but it should be doable if not tedious. Luckily there are existing conversion tools available to help.
You could also try using a foreign data wrapper to map the tables in SQL Server to a running instance of PostgreSQL. Then it's just a matter of copying tables. Depends on your needs and where each database server is located relative to one another.
The stored procedures will be far more difficult to handle unfortunately. While Oracle's pl/sql language is substantially similar to PostgreSQL's pl/pgsql, MS SQL Server/Sybase's TransactSQL dialect on the other hand is different enough to require rewrites. If the TransactSQL functions also access .Net objects, the migration task may end up far more difficult as you reimplement dependencies or find logical equivalents.
I am trying to CREATE VIEW in access in SQL view but I am getting a syntax error for CREATE TABLE which is highlighting the word VIEW. This is in Access 2016 via Office 365 (latest update as of 2/11/2019). The SELECT statement works by itself, but the CREATE VIEW command isn't. My book (Concepts of Database Management) is designed for use specifically alongside Access. My code is as such:
CREATE VIEW TopLevelCust AS
SELECT CustomerNum, CustomerName, Street, Balance, CreditLimit
FROM Customer
WHERE CreditLimit>=10000
;
As already stated in Lynn's answer, if you want to execute this query, you can do that after turning on SQL server compatible syntax.
However, you can also execute the query using an OLEDB connection to the Access database.
You can even do this using VBA and the already preset CurrentProject.Connection object:
CurrentProject.Connection.Execute "CREATE VIEW Query1 AS SELECT 1"
Without turning on SQL server compatible syntax, DDL statements executed from Access itself are fairly limited (for example, you can also not use the Decimal data type). But these DDL statements are not really meant to be executed from Access itself, VBA provides way better tools to create queries (that also allows creating pass-through queries, for example).
According to the asker and other users, enabling ANSI-92 SQL in the database options will allow you to execute the DDL statement CREATE VIEW.
File > Options > Object Designers > Query Design.
According to Wolfgang, under the hood, this actually creates a query.
<SoapBox>
It surprises me that your text reference requests you to execute statements that aren't enabled by default in Access, especially without a special note screaming at you that you need to enable a special option before database creation. ¯\_(ツ)_/¯
</SoapBox>
Anyone have a PL-SQL statement that i can use to generate database & tables schema for specific database on Oracle 10g? I need the schema in .sql file and if possible compatible with ANSI-92/99 sql implementation, so i can use the generated .sql directly on sql server 2005.
Already heard about exp/imp, but it seems generated dump file, what i need just a simple ddl on .sql file.
Thanks
You could try:
select dbms_metadata.get_ddl('TABLE',table_name,owner)
from dba_tables where owner='schema name';
It returns longs, so you may want to play with the long buffer.
More about dbms_metadata here: http://download.oracle.com/docs/cd/B19306_01/appdev.102/b14258/d_metada.htm
If you just need to dump your schema, this free package does a very nice job. We use it in daily production.
http://sourceforge.net/projects/cx-oracletools
If you need to convert from Oracle to SQL Server, this software might do a better job. We've used it to convert between Oracle, MySql, and Postgreqsql.
http://www.spectralcore.com/fullconvert
I wrote oraddlscript which calls dbms_metadata.get_ddl (Pop's answer) for each database object owned by a user and writes the DDL to a file.
Update: Answered comment
Greetings, I'd recomend using Oracle SQL Developer Data Modeler since it's from Oracle, it can read the DDL information directly from the Data Dictionary. It creates an ERD and then you can produce DDL for SQL Server 2000/2005, some versions of DB2 and Oracle 9i/10g/11g.
Does anyone know how to generate SQL scripts from a query?
For example,
Script some tables.
Do custom action 1.
Script the views.
Do custom action 2.
Etc.
It sounds like you want to write a cursor to execute custom SQL. This is common and easy to do. What you need to do is specify a few things to help us more completely answer your question:
What type of SQL server are you using? (MSSQL, Oracle, MySQL)
What language are you writing in? (Java, C++, PL/SQL, TSQL)
You can either write code (Java / C++) to generate SQL from a query, or possibly use a cursor to iterate over recordsets (PL/SQL / TSQL). You can use the results to give you information that can then be executed as SQL via an exec (of some kind depending on the language).
... but please investigate SQL injection before implementing dynamic SQL. Look into Parameterized Queries...
With Microsoft Sql Server, the best way to script database objects is to use SMO. Sql Management Objects is a c# api, but you could always execute t-sql scripts from c# using a SqlClient.
You could want something like
select 'UPDATE '+table_name+ ' SET description=''(new!) ''+description WHERE description_date>''2008-11-01'''
from information_schema.tables where table_name like '%Description'
(this query generates queries which prepend value of description column with '(new!) ' for each recent row in each table which name ends with 'Description' in a fictional database).
The system view INFORMATION_SCHEMA.TABLES contains data about all database tables, there are also INFORMATION_SCHEMA.VIEWS, INFORMATIONS_CHEMA.COLUMNS and other system views in INFORMATION_SCHEMA table schema.
Hope this will help.