I am trying to insert data using select statement. The table which I am inserting is having foreign key and it is sequence ID. How do I accomplish this? Because if I insert the sequence key in associated table first then how do I get the list of all the sequence ID to insert into the table.
Please note I am using insert with select statement so is there way to accomplish this without using cursor?
I think you can extract sequence value and then re-use it as many times as you want:
DECLARE #NextValue INT
SELECT #NextValue = NEXT VALUE FOR MySequence
SELECT NextValue = #NextValue
INSERT INTO PrimaryTable(PK_ID) VALUES (#NextValue);
INSERT INTO SecondaryTable(FK_ID) VALUES (#NextValue);
Here what I have tried.
DECLARE #MyTabVaR TABLE
(
FOREIGNKEY_ID INT,
COMMON_COL INT
);
INSERT INTO #MyTabVaR
SELECT NEXT VALUE FOR DBO.MY_SEQ,COMMON_COL FROM another_table2
INSERT INTO actual_table
SELECT FOREIGNKEY_ID FROM #MyTabVaR
INSERT INTO another_table
SELECT * FROM copy_table C
LEFT JOIN actual_table A
ON C.COMMON_COL=A.COMMON_COL
WHERE A.FOREIGNKEY_ID IS NOT NULL
I am trying to insert into 3 tables from one single select statement. Here is what I am trying to do:
insert into dbo.temp1 (name, location, city)
select name, location, city from mytable.
I want to be able to insert into 3 tables once I run the select statement like inserting into temp1, temp2 and temp3.
How can I do this? Thanks.
You can do it maximum for 2 tables with using output:
insert into dbo.temp1 (name, location, city)
output inserted.name, inserted.location, inserted.city into temp2
select name, location, city from mytable
You can't do this in one step*
What you can do is to insert the initial query into a #temp table (or a #table variable) as a staging area, and then insert into the tables from there. Wrap the steps in a transaction to retain ACID:
BEGIN TRAN
select name, location, city
into #TEMP
from mytable;
insert into temp1(name, location, city)
select name, location, city
from #TEMP;
-- Same for temp2 and temp3.
COMMIT TRAN
* Excluding hacks such as a view with an Instead-of Trigger.
The staging table is important from a concurrency point of view, as repeating the original query 3 times may result in different results if there are interim concurrent changes to the source table.
You can.
With a trick.
Create a view, then create an 'instead of' trigger for insert on that view where you insert the stuff into your tables. If you now insert into your view, you finally insert data in 3 tables. Here's a demo
-- 1. create 3 test tables
create table t1( id int, f1 varchar(20))
create table t2( id int, f2 varchar(20))
create table t3( id int, f3 varchar(20))
go
-- 2. create the view
create view Tt as
select t1.ID, t1.f1, t2.f2,t3.f3
from t1
join t2 on t1.ID=t2.ID
join t3 on t1.ID=t3.id
go
-- 3. create the trigger
create trigger Tr_Test on Tt INSTEAD OF INSERT
AS
BEGIN
SET NOCOUNT ON;
insert into t1 select id,f1 from inserted
insert into t2 select id,f2 from inserted
insert into t3 select id,f3 from inserted
END
GO
-- 4. now do your insert with a single select
insert into tt
select 1,'A','B','C'
-- 5. and watch the 3 tables
select * from t1
select * from t2
select * from t3
voilá, one insert, 3 tables got modified. Wwe don't count the hidden trigger, do we ;-)
There is no way to insert into X tables with one query (Ok it its with insert and output to table).
So you have to write 3 queries.
Or you can generate SQL statments with dynamic queries.
I don't believe you can insert into multiple tables in one statement. You can definitely do it in one transaction, however.
BEGIN TRANSACTION
INSERT INTO dbo.temp1 (name, location, city)
SELECT name, location, city
FROM myTable
INSERT INTO dbo.temp2 (name, location, city)
SELECT name, location, city
FROM myTable2
COMMIT TRANSACTION
You can insert into multiple tables with one select statement using a TRIGGER.
CREATE TRIGGER TEMP2_TEMP3_INSERT ON TEMP1
AFTER INSERT AS
BEGIN
/* create your insert statements for TEMP2 and TEMP3 here
referencing the data from the first insert */
END;
GO
MySQL doesn't support multi-table insertion in a single INSERT statement. Oracle is the only one I'm aware of that does, oddly...
However, you CAN use a transaction and have both of them be contained within one transaction.
MySQL:
START TRANSACTION;
INSERT INTO table1 VALUES ('1','2','3');
INSERT INTO table2 VALUES ('1','2','3');
COMMIT;
SQL Server:
BEGIN TRAN;
INSERT INTO table1 VALUES ('1','2','3');
INSERT INTO table2 VALUES ('1','2','3');
COMMIT;
SQL Server with error catching/rollback:
BEGIN TRANSACTION [Tran1]
BEGIN TRY
INSERT INTO table1 VALUES ('1','2','3')
INSERT INTO table2 VALUES ('1','2','3')
COMMIT TRANSACTION [Tran1]
END TRY
BEGIN CATCH
ROLLBACK TRANSACTION [Tran1]
END CATCH
GO
When I want to get last inserted ID to a table I use it like this:
insert into table1(col1,col2,col3)
values(val1,val2,val3)
declare #last_id int = scope_identity()
Now I have stored procedure that gets a value inserts multiple items:
insert into table1(col1,col2,col3)
select #val1,#val2,val3 from table2 where value=#value //#value is a single value that is passed to procedure as argument
now how can I get the list of IDs of these multiple rows that are added to table1?
declare #inserted table (Id int)
insert into table1(col1,col2,col3)
output inserted.Id into #inserted (Id)
select #val1,#val2,val3
from table2
where value=#value
select * from #inserted
The SCOPE_IDENTITY() gets you the last generated Identity Value in the identity column. to get all the newly inserted values you will need to make use of OUTPUT clause along with a table variable. See below how you can do that.
DECLARE #New_IDs TABLE(IDs INT)
insert into table1(col1,col2,col3)
OUTPUT inserted.Id_column INTO #New_IDs
select #val1,#val2,val3
from table2
where value=#value
SELECT * FROM #New_IDs
Is it Possible to extract the ID of the record being inserted in a table at the time of inserting dat particular record into that table ??? Reference to Sql Server
Read about INSERT with OUTPUT. This is in my experience the easiest way of achieving an atomic INSERT outputting an inserted value.
Example, assuming that Table contains an auto-incremented field named ID:
DECLARE #outputResult TABLE (ID BIGINT)
INSERT INTO Table
(
Field1,
Field2
)
OUPUT INSERTED.ID INTO #outputResult
VALUES
(
....
)
SELECT TOP 1 ID FROM #outputResult
You can select the ID afterwards with
SELECT ##IDENTITY
or
SELECT SCOPE_IDENTITY()
Just as a preface, I'm not very knowledgeable on T-SQL syntax.
I'd like to create a simple SQL script that will make 3 insert statements.
Insert A
Insert B
Insert C
Insert A statement's identity or "ID" would be needed in insert B statement.
And both the identities Inserts A & B would be needed in Insert C statement.
Pseudo code would look something like:
INSERT INTO tableA
VALUES ('blah', 'blah')
INSERT INTO tableB
VALUES (IDENTITY_FROM_A_INSERT, 'foo')
INSERT INTO tableC
VALUES (IDENTITY_FROM_A_INSERT, IDENTITY_FROM_B_INSERT)
How would I go about writing this script?
Use SCOPE_IDENTITY() after each insert in order to get the identity of the inserted row (in the current session).
I have used two variables to capture the two identities and then insert them into the third table:
DECLARE #Id1 INT
DECLARE #Id2 INT
INSERT INTO tableA VALUES ('blah', 'blah')
SET #Id1 = SELECT SCOPE_IDENTITY()
INSERT INTO tableB VALUES (IDENTITY_FROM_A_INSERT, 'foo')
SET #Id2 = SELECT SCOPE_IDENTITY()
INSERT INTO tableC VALUES (#Id1, #Id2)
scope_identity() is perfect for integer identifiers on single-record insertions (+1 to the other answer btw). However, if you find yourself using a guid/uniqueidentifier (newsequentialid(), newid(), etc) or inserting multiple records at once, you'll need something a little different:
declare #id uniqueidentifier;
-- Table variable for storing your newly inserted identifiers:
declare #NewlyInsertedIds table
(
[Id] uniqueidentifier
);
insert [MyTable]
(
[Blah1]
,[Blah2]
)
-- in the output clause you can access the inserted/deleted pseudo tables:
ouptut inserted.[Id]
into #NewlyInsertedIDs
(
[Id]
)
values
(
'Blah'
,'Blah'
);
select
#id = [Id]
from #NewlyInsertedIds;
Check out the OUTPUT Clause for more information.