SQL - Copy Data Within Same Table

Question

I\'m not that great with SQL Server, but I\'m trying to do some behind the scenes work to create some functionality that our EMR system lacks - copying forms (and all their

Answer 1

I always like creating sample tables in [tempdb] so that the syntax is correct. I created tables [t1], [t2], and [t3]. There are primary and foreign keys.

If you have a well developed schema, ERD (entity relationship diagram) http://en.wikipedia.org/wiki/Entity-relationship_diagram , these relationships should be in place.

-- Playing around
use tempdb
go


--
-- Table 1
--

-- Remove if it exists
if object_id('t1') > 0
drop table t1
go

-- Create the first table
create table t1
(
encounter_id int,
patient_id int, 
the_date date,
the_time time,
constraint pk_t1 primary key (encounter_id)
);
go

-- Add one row
insert into t1 values (1234, 112233, '2014-01-02', '14:25:01:00');
go

-- Show the data
select * from t1
go


--
-- Table 2
--

-- Remove if it exists
if object_id('t2') > 0
drop table t2
go

-- Create the second table
create table t2
(
encounter_id int,
the_page int,
recorded_on date,
recorded_by int,
constraint pk_t2 primary key (encounter_id, the_page)
);
go

-- Add two rows
insert into t2 values 
(1234, 1, '2014-01-02', 134),
(1234, 2, '2014-01-02', 134);    
go  

-- Show the data
select * from t2
go

--
-- Table 3
--

-- Remove if it exists
if object_id('t3') > 0
drop table t3
go

-- Create the third table
create table t3
(
encounter_id int,
the_page int,
key_name1 varchar(16),
key_value1 varchar(16),
constraint pk_t3 primary key (encounter_id, the_page, key_name1)
);
go

-- Add seven rows
insert into t3 values 
(1234, 1, 'key1', 'aaa'),
(1234, 1, 'key2', 'bbb'),
(1234, 1, 'key3', 'ccc'),
(1234, 1, 'key4', 'ffffd'),
(1234, 2, 'key5', 'eee'),
(1234, 2, 'key6', 'fff'),
(1234, 2, 'key7', 'ggg');
go

-- Show the data
select * from t3
go

--
-- Foreign Keys
--

alter table t2 with check
add constraint fk_t2 foreign key (encounter_id)
references t1 (encounter_id);

alter table t3 with check
add constraint fk_t3 foreign key (encounter_id, the_page)
references t2 (encounter_id, the_page);

Here comes the fun part, a stored procedure to duplicate the data.

--
-- Procedure to duplicate one record
--

-- Remove if it exists
if object_id('usp_Duplicate_Data') > 0
drop procedure t1
go

-- Create the procedure
create procedure usp_Duplicate_Data @OldId int, @NewId int
as
begin

  -- Duplicate table 1's data
  insert into t1 
  select 
    @NewId,
    patient_id, 
    the_date,
    the_time
  from t1
  where encounter_id = @OldId;

  -- Duplicate table 2's data
  insert into t2 
  select 
    @NewId,
    the_page, 
    recorded_on,
    recorded_by
  from t2
  where encounter_id = @OldId;

  -- Duplicate table 3's data
  insert into t3 
  select 
    @NewId,
    the_page, 
    key_name1,
    key_value1
  from t3
  where encounter_id = @OldId;

end

Last but not least, we have to call the stored procedure to make sure it works.

-- Sample call
exec usp_Duplicate_Data 1234, 7777

In summary, I did not add any error checking or accounted for a range of Id's. I leave these tasks for you to learn.