I've got table:
ID (identity, PK), TaskNr, OfferNr
I want to do insert ignore statement but sadly it's not working on MSSQL, so there's a IGNORE_DUP switch. But I need to check duplicates using TaskNr column. Is there any chance to do that?
Edit:
Sample data:
ID (identity, PK), TaskNr, OfferNr
1 BP1234 XAS
2 BD123 JFRT
3 1122AH JDA33
4 22345_a MD_3
Trying to do:
insert ignore into Sample_table (TaskNr, OfferNr) values (BP1234, DFD,)
Should ignore that row and go to next value of insert statement. ID is autoincremented but unique value should be checked using TaskNr column.
SQL Server does not support insert ignore. That is MySQL functionality.
You can do what you want as:
insert ignore into Sample_table (TaskNr, OfferNr)
select x.TaskNr, x.OfferNr
from (select 'BP1234' as TaskNr, 'DFD' as OfferNr) x
where not exists (select 1
from Sample_Table st
where st.TaskNr = x.TaskNr and st.OfferNr = x.OfferNr
);
You can try two options:
insert into ... where not exists ()
t-sql merge statement (https://learn.microsoft.com/en-us/sql/t-sql/statements/merge-transact-sql)
Related
create table source_table (id number);
insert into source_table values(3);
insert into source_table values(1);
insert into source_table values(2);
create table target_table (id number, seq_val number);
create sequence example_sequence;
insert into target_table
select id, example_sequence.nextval
from
> (select id from source_table ***order by id***);
Is it officially assured that for the id's with the lower values in source_table corresponding sequence's value will also be lower when inserting into the source_table? In other words, is it guaranteed that the sorting provided by order by clause will be preserved when inserting?
EDIT
The question is not: 'Are rows ordered in a table as such?' but rather 'Can we rely on the order by clause used in the subquery when inserting?'.
To even more closely illustrate this, the contents of the target table in the above example, after running the query like select * from target_table order by id would be:
ID | SEQ_VAL
1 1
2 2
3 3
Moreover, if i specified descending ordering when inserting like this:
insert into target_table
select id, example_sequence.nextval
from
> (select id from source_table ***order by id DESC***);
The output of the same query from above would be:
ID | SEQ_VAL
1 3
2 2
3 1
Of that I'm sure, I have tested it multiple times. My question is 'Can I always rely on this ordering?'
Tables in a relational database are not ordered, and any apparent ordering in the result set of a cursor which lacks an ORDER BY is an artifact of data storage, is not guaranteed, and later actions on the table may cause this apparent ordering to change. If you want the results of a cursor to be ordered in a particular manner you MUST use an ORDER BY.
In my project I need to create a script that insert data with auto generate value for the primary key and then to reuse this number for foreign on other tables.
I'm trying to use the WITH statement in order to keep that value.
For instance, I'm trying to do this:
WITH tmp as (SELECT ID FROM (INSERT INTO A ... VALUES ...))
INSERT INTO B ... VALUES tmp.ID ...
But I can't make it work.
Is it at least possible to do it or am I completely wrong???
Thank you
Yes, it is possible, if your DB2-server version supports the syntax.
For example:
create table xemp(id bigint generated always as identity, other_stuff varchar(20));
create table othertab(xemp_id bigint);
SELECT id FROM FINAL TABLE
(INSERT INTO xemp(other_stuff)
values ('a'), ('b'), ('c'), ('d')
) ;
The above snippet of code gives the result below:
ID
--------------------
1
2
3
4
4 record(s) selected.
If you want to re-use the ID to populate another table:
with tmp1(id) as ( SELECT id FROM new TABLE (INSERT INTO xemp(other_stuff) values ('a1'), ('b1'), ('c1'), ('d1') ) tmp3 )
, tmp2 as (select * from new table (insert into othertab(xemp_id) select id from tmp1 ) tmp4 )
select * from othertab;
As per my understanding
You will have to create an auto-increment field with the sequence object (this object generates a number sequence).
You can CREATE SEQUENCE to achieve the auto increment value :
CREATE SEQUENCE seq_person
MINVALUE 1
START WITH 1
INCREMENT BY 1
CACHE 10
I wonder if it exists a function that allows me to get total rec count of a table to for new record insertion into the table?
I have this table:
CREATE TABLE "TEST"
( "NAME" VARCHAR2(20 BYTE),
"ID" NUMBER,
"FLAG" NUMBER
) ;
Insert into TEST (NAME,ID,FLAG) values ('Ahlahslfh',1,1);
Insert into TEST (NAME,ID, FLAG) values ('Buoiuop',2,1);
Insert into TEST (NAME,ID, FLAG) values ('UOIP',12,0);
My intention is to issue a statement that is equivalent to this:
INSERT INTO TEST( NAME, ID, FLAG )
VALUES( 'TST', 3,1 );
The statement I used below generated error:
INSERT INTO TEST ( NAME, ID, FLAG )
VALUES ( 'TST', SELECT COUNT(*)+1 FROM TEST WHERE FLAG=1,1 );
Below is the final result I am expecting:
Is there a way around it? Of course, I can put them in a script, count the records into a variable and insert that variable into the field. I just wonder if there is more elegant solution and do this in 1 statement.
Thanks!
This is likely to be a very bad way to set an id. In general, I think you should use sequences/identity/auto_increment and not worry about gaps.
But, you can do what you want using parentheses -- these are needed for subqueries:
INSERT INTO TEST(NAME, ID, FLAG)
VALUES ('TST',
(SELECT COUNT(*)+1 FROM TEST WHERE FLAG = 1),
1
);
Or, alternatively:
INSERT INTO TEST(NAME, ID, FLAG)
SELECT 'TST', COUNT(*) + 1, 1
FROM TEST
WHERE FLAG = 1;
I must emphasize that this seems dangerous. It is quite possible that you will get duplicate ids. You should really let the database insert a new value and not worry about gaps.
I would need to insert the non existing values to a Table.
Table name BarcodeSubgroup (single column table)
Column (nvarchar)
Sample data in the table
ProductSubGroupID
-----------------
F11WD
F77AH
G36CN
G37HJ
H11AA
H11AD
Now I need to insert the non existing values in the table.
Values want to be checked and inserted.
H11AA
H11AD
G78DE
G76DK
G41JA
B45JC
Query written
insert into BarcodeSubgroup
select
productsubgroupid
where
not exists ('G78DE', 'G76DK', 'G41JA',
'B45JC', 'H11AA', 'H11AD')
Now it should insert only the 4 non existing values.
You can do this with select . . . not exists:
insert into BarcodeSubgroup(productsubgroupid)
select productsubgroupid
from (values ('G78DE'), ('G76DK'), ('G41JA'), ('B45JC'), ('H11AA'), ('H11AD') ) v(productsubgroupid)
where not exists (select 1
from BarcodeSubgroup bs
where bs.productsubgroupid = v.productsubgroupid
);
I have to insert the data at a time in 3 tables into PostgreSQL database.
I have to insert data into first and Second table is directly.
But The third table which i received data as array and inserted into 3rd table as same.
Is data inserting as array into PostgreSQL available or possible?
If it possible how can I insert can some correct me
How can i do the same mechanism with Wso2 DSS 3.0.1.
My query is
with first_insert as (insert into sample(name,age)
values(?,?)
RETURNING id
),
second_insert as (insert into sample1(empid,desig)
values((select id from first_insert),?)
RETURNING userid
)
insert into sample2(offid,details)
values((select userid from second_insert),?)
Not sure I understood your question exactly, but at least you could use insert into ... select:
with cte_first_insert as
(
insert into sample1(name, age)
values('John', 25)
returning id
), cte_second_insert as (
insert into sample2(empid, desig)
select id, 1 from cte_first_insert
returning userid
)
insert into sample3(offid, details)
select userid, 'test'
from cte_second_insert;
sql fiddle demo