Choose your database:
AnySQL
MySQL
MS SQL Server
PostgreSQL
SQLite
Firebird
Oracle
SQL Anywhere
DB2
MaxDB

Subscribe to our news:
Partners
Testimonials
Jim Salmons: "That is excellent news! I will look forward to a future update with these features. It will be attention to such details that further distinguishes your excellent products from the competition.

As always, I appreciate your great products and your demonstrated customer service is equal to the high quality of your products".
Kevin Settler: "If you need the job done right and on time, do it with MS SQL Maestro on your team. The software is a pleasure for us. SQL Maestro Group do excellent work and are dedicated to producing products that all can be proud of".

More

Add your opinion

MS SQL Maestro online Help

Prev Return to chapter overview Next

Split table

It's not an uncommon situation when new requirements arise, or when you need to enforce referential integrity on a set of columns, and the best decision is to split a table into two separate tables. MS SQL Maestro provides you with Split Table Wizard, a simple tool to generate a bunch of SQL scripts to modify the primary table, to create a secondary table with a primary key, and to transfer data from the primary table to the secondary one without duplicating of data. To invoke the wizard, follow the corresponding link of the Generate SQL section of popup menu of the selected table at the Explorer tree.

 

 

Let's see the wizard in action on the example of a table with the following SQL definition:

 

CREATE TABLE person (

  id         integer NOT NULL,

  city       varchar(30) NOT NULL,

  full_name  varchar(30) NOT NULL,

  /* Keys */

  CONSTRAINT person_pkey

    PRIMARY KEY (id)

);

 

The table stores sample data:

 

 

To enforce the referential integrity, we specify 'city' as secondary table:

 

 

The primary table must contain now only 'id' and' full_name' columns. The field 'city_id' will be added to the table automatically.

 

Now we have to specify what kind of primary key to be created for the secondary table: surrogate or natural. We create create the 'city' table with a surrogate primary key.

 

 

Then click Ready and get the following tables:

 



Prev Return to chapter overview Next