how can i create a table dynamically in the database which is already created.i want the table be created when a button is clicked.
thank you
You need to build a CREATE TABLE statement, making sure to escape all table and field names with [...], and use a SqlCommand to execute it.
Related
Oracle EBS R12.2.9
I have to add a new column to an editioning view of a custom table in oracle EBS R12.2.9.
Table was created like this...
From AMTO: create table amto.mci_jjtest1(a number)
From APPS: exec ad_zd_table.upgrade('AMTO', 'MCI_JJTEST1') -- This creates editioning view and also synonym under APPS
Now, new column B number with data type, needs to be added to the table, and the editioning view needs to be modified to add that column to the editioning view. Kindly let me know what commands and steps, I need to follow. I understand the traditional approach, where we would alter table to add column, and create or replace view to add the column to the SELECT, Not sure how to add column to table and editioning view the correct recommended way. Please suggest.
For table alterations - after running the DDL run below script to regenerate the editioning view for syncing any table changes.
exec AD_ZD_TABLE.PATCH('AMTO','MCI_JJTEST1')
I am working on such application where table audit should perform to make revision of updated records. Let's say for example I have to log each field update in Users update.
I wants to create clone of existing user table by
CREATE TABLE users_audit LIKE users;
My main question is,
Is there any alternative way or provision in Laravel migration to create table from existing table ?
I know we can run raw sql query in migration up/down method using \DB::raw();
But it would be helpful if any helper function available to create table from existing table like, create or table
Yes, you can, see the below link
Click this link
This statement is used to execute raw queries
DB::statement('CREATE TABLE tablename LIKE existingtablename');
I want to create a table (lets say table_copy) which has same columns as other table (lets call it table_original) in Oracle database, so the query will be like this :
create table table_copy as (select * from table_original where 1=0);
This will create a table, but the constraints of table_original are not copied to table_copy, so what should be done in this case?
Only NOT NULL constraints are copied using Create Table As Syntax (CTAS). Others should be created manually.
You might however query data dictionary view to see the definitions of constraints and implement them on your new table using PL/SQL.
The other tool that might be helpful is Oracle Data Pump. You could import the table using REMAP_TABLE option specifying the name for the new table.
Use a database tool to extract the DDL needed for the constraints (SQL Developer does the job). Edit the resulting script to match the name of the new class.
Execute the script.
If you need to do this programmatically you can use a statement like this:
DBMS_METADATA.GET_DDL('TABLE','PERSON') from DUAL;
I have a database schema which is identical in files 1.sqlitedb through n.sqlitedb. I use a view to 'merge' all of the databases. My question is: when i insert into the view, into which database does the data get inserted into? Is there any way to control which gets the data? The way that i need to split the data depends on the data itself. Essentially, i use the first letter of a field to determine the file that it gets inserted into. Any help would be appreciated. Thanks!
Writing to views is NOT supported for SQLite like it is with other dbs.
http://www.sqlite.org/omitted.html
In order to achieve similar functionality, one must create triggers to do the necessary work.
We need to implement instead of trigger on the view (VIEW_NAME) . So when insert/update happens view . we can insert update underlying object (TABLE_NAME) in the trigger body.
CREATE TRIGGER trigger_name instead of INSERT on VIEW_NAME
BEGIN
insert into TABLE_NAME ( col1 ,col2 ) values ( :new.col1, :new.col2);
END;
I'm not sure I understand your question, but have you looked into using the ATTACH DATABASE command? It allows you connect separate database files to a single database. You can control INSERTs into a specific database by prefixing the database name (INSERT INTO db1.Table).
http://www.sqlite.org/lang_attach.html
I'm wondering if its possible to create a view that automatically checks if there is a new monthly created table and if there is include that one?
We have a new table created each month and each one ends with the number of the month, like
table for January: table_1
table for February: table_2
etc...
Is it possible to create a view that takes data from all those tables and also finds when there is a new one created?
No, a view's definition is static. You would have to replace the view each month with a new copy that included the new table; you could write a dynamic PL/SQL program to do this. Or you could create all the empty tables now and include them all in the view definition; if necessary you could postpone granting any INSERT access to the future tables until they become "live".
But really, this model is flawed - see Michael Pakhantsov's answer for a better alternative - or just have one simple table with a MONTH column.
Will be possible if you instead of creating new table each month will create new partition for existing table.
UPDATE:
If you have oracle SE without partitioning option you can create two tables: LiveTable and ArchiveTable. Then each month you need move rows from Live to ArchiveTable and clean live table. In this case you need create view just from two tables.
Another option is to create the tables in another schema with grants to the relevant user and create public synonyms to them.
As the monthly tables get created in the local schema, they'll "out-precedence" the public synonyms and the view will pick them up. It will still get invalidated and need recompiling, but the actual view text should need changing, which may be simpler from a code-control point of view.
You can write a procedure or function that looks at USER_TABLES or ALL_TABLES to determine if a table exists, generate dynamic sql, and return a ref cursor with the data. The same can be done with a pipelined function.