I have some coupon software for an e-commerce site. I want to generate a bunch of coupons at once. It consists of 2 tables. 1 for the coupon, and 1 for the coupon description. The primary key being coupon_id.
Is this the proper way to do the sql? Will the coupon_id match up? Since it is auto-incremented and I am not inputting a number I think it should.
edit: I just rechecked and only the coupon_id field in coupons table is auto incremented not the one in coupon_description
But I'm not sure if using 2 inserts is the proper way.
INSERT INTO coupons (
coupon_id,
coupon_type,
coupon_code,
coupon_amount,
coupon_minimum_order,
coupon_start_date,
coupon_expire_date,
uses_per_coupon,
uses_per_user,
restrict_to_products,
restrict_to_categories,
restrict_to_customers,
coupon_active,
date_created,
date_modified
)
VALUES (
'' , '', '" . substr(md5(uniqid(rand(), true)), 0, 8) ."', '100' , '1' , '06/05/2013' , '06/11/2013' , '1' , '1', '', '', '', '', '', '')
INSERT INTO coupons_description (
coupon_id,
language_id,
coupon_name,
coupon_description
)
VALUES (
'', '1', 'test coupon', 'test'
)
Since only one is auto-incremented, I would insert into that table first, then look up the value and hard-code it into the dependant table. That is:
INSERT INTO coupons (
coupon_type,
coupon_code,
...)
VALUES ('', '" . substr(md5(uniqid(rand(), true)), 0, 8) ."', '100' ,...).
Notice that coupon_id is NOT in the insert statement. The database will assign that itself (assuming the auto-increment is doing what it should). Some databases let you assign this, but I consider that bad form. The problem, then, is finding that record again. I'd use:
select * from coupons order by coupon_id desc;
Unless someone else is adding coupons at the same time, you should see your coupon on top. It would help if you used a unique coupon name or description. Anyway, you'll have to take the assigned ID and then update the table WITHOUT the auto-increment:
INSERT INTO coupons_description (
coupon_id,
language_id,
coupon_name,
coupon_description)
VALUES ('123', '1', 'test coupon', 'test')
Where '123' is really whatever coupon_id you found from the select statement.
But your syntax does look correct, otherwise.
I may go 'coupons' table check biggest coupon_id and specify the new id in insert explicitly. I think this is a safer way to prevent any mismatching.
let's say you have 100 coupon in coupons already. So in your case:
INSERT INTO coupons (
coupon_id,
coupon_type,
...
) VALUES (101 , '', ...);
INSERT INTO coupons_description (
coupon_id,
language_id,
coupon_name,
coupon_description
) VALUES (101, '1', 'test coupon', 'test')
I would suggest either merging the two tables (they appear to have a 1:1 relationship) or changing the description table so that coupon_id is a foreign key of the first table, and remove the autoincrement. After that you can insert into the first table, then instead of trying to guess the id to insert into the second table, you just use select ##identity; (or select scope_identity(); if on sql server)
Related
I have to insert data in provonance of several table which itself comes from csv (COPY).
Before I used a LOOP in a function to enter the data. I want to simplify the thing for the sake of maintainability and speed.
I need to insert data into a description table, which serves as both the title and description (and multi language).
Previously my code was as follows (extract from the loop):
insert into description (label, lang_id, poi_id,date_dernier_update, date_enregistrementbdd, date_derniere_lecture) values (label, lang_id, poi_id, now(), now(), now()) RETURNING id INTO _retour_id_titre;
insert into poi_titre_poi (poi_id, titre_poi_id, titre_poi_key) values (poi_id, _retour_id_titre, label_lang);
But now I can't:
with rows as (
insert into description (label, lang_id, poi_id)
select rdfslabelfrs, '1', (select id from poi where uri_id = csv_poi_rdf_fr.poi) as toto from csv_poi_rdf_fr RETURNING id
)
insert into poi_titre_poi (poi_id, titre_poi_id, titre_poi_key)
select description.poi_id, id , 'fr'
FROM description;
In fact, I cannot insert the 'poi_id' in the 'poi_titre_poi' table which corresponds to the one which was inserted in the description table.
I get this error message:
ERROR: more than one row returned by a subquery used as an expression
État SQL : 21000
Can I make this work, or do I need to loop?
Filling in missing bits with assumptions, it could work like this:
WITH description_insert AS (
INSERT INTO description
(label , lang_id, poi_id)
SELECT c.rdfslabelfrs, 1 , p.id
FROM csv_poi_rdf_fr c
JOIN poi p ON p.uri_id = c.poi
RETURNING poi_id, id
)
INSERT INTO poi_titre_poi (poi_id, titre_poi_id, titre_poi_key)
SELECT d.poi_id, d.id , 'fr'
FROM description_insert d;
Related:
PostgreSQL multi INSERT...RETURNING with multiple columns
Insert data in 3 tables at a time using Postgres
Get Id from a conditional INSERT
I'm developing a query for a program where user has to enter one or multiple multiple values into a DB table.
The issue with the query is when you try to insert multiples values it could be that some of those values are repeated in the tables and the warning will only display one repeated value at a time and that might be a problem when you are working with a 1000+ values.
Error Message:
Cannot insert duplicate key row in object 'ItemWebCategory' with unique index 'IX_StyleID_WebCategoryID'. The duplicate key value is (1109068, 99999).
Query
insert into ItemWebCategory (Style_id,WebCategoryID)
select distinct Style_id,WebCategoryID = '99999'
from ItemCategory
where style_id in ('1109068','168175', '68435', '545457', '69189')
Question
How can I modify the query so it may skip/exclude all repeating values and only insert the values that do no exist on the table?
Try something like this:
INSERT INTO ItemWebCategory ( Style_id, WebCategoryID )
SELECT DISTINCT
Style_id,
'99999' AS WebCategoryID
FROM ItemCategory WHERE Style_id NOT IN (
SELECT Style_id FROM ItemWebCategory
);
The NOT IN excludes any Style_id values that already exist in ItemWebCategory.
You have two straight-forward options:
NOT EXISTS
insert into ItemWebCategory (Style_id,WebCategoryID)
select distinct Style_id,WebCategoryID = '99999'
from ItemCategory ic
where style_id in ('1109068','168175', '68435', '545457', '69189')
AND NOT EXISTS (SELECT 1
FROM ItemWebCategory iwc
WHERE ic.Style_id = iwc.Style_id
);
EXCEPT
insert into ItemWebCategory (Style_id,WebCategoryID)
select Style_id,WebCategoryID = '99999'
from ItemCategory
where style_id in ('1109068','168175', '68435', '545457', '69189')
EXCEPT
SELECT Style_id
FROM ItemWebCategory;
Now there's no need for DISTINCT because EXCEPT implies DISTINCT
One more useful option is a MERGE. This has performance benefits due to Halloween Protection (an entire subject in itself) as explained by Paul White:
MERGE ItemWebCategory AS target
USING (
select Style_id, WebCategoryID = '99999'
from ItemCategory
where style_id in ('1109068','168175', '68435', '545457', '69189')
) AS source
ON target.Style_id = source.Style_id
WHEN NOT MATCHED THEN INSERT
(Style_id, WebCategoryID)
VALUES (source.Style_id, source.WebCategoryID);
I have DB2 table "organization" which holds organizations data including the following columns
organization_id (PK), name, description
Some organizations are deleted so lot of "organization_id" (i.e. rows) doesn't exist anymore so it is not continuous like 1,2,3,4,5... but more like 1, 2, 5, 7, 11,12,21....
Then there is another table "title" with some other data, and there is organization_id from organization table in it as FK.
Now there is some data which I have to insert for all organizations, some title it is going to be shown for all of them in web app.
In total there is approximately 3000 records to be added.
If I would do it one by one it would look like this:
INSERT INTO title
(
name,
organization_id,
datetime_added,
added_by,
special_fl,
title_type_id
)
VALUES
(
'This is new title',
XXXX,
CURRENT TIMESTAMP,
1,
1,
1
);
where XXXX represent "organization_id" which I should get from table "organization" so that insert do it only for existing organization_id.
So only "organization_id" is changing matching to "organization_id" from table "organization".
What would be best way to do it?
I checked several similar qustions but none of them seems to be equal to this?
SQL Server 2008 Insert with WHILE LOOP
While loop answer interates over continuous IDs, other answer also assumes that ID is autoincremented.
Same here:
How to use a SQL for loop to insert rows into database?
Not sure about this one (as question itself is not quite clear)
Inserting a multiple records in a table with while loop
Any advice on this? How should I do it?
If you seriously want a row for every organization record in Title with the exact same data something like this should work:
INSERT INTO title
(
name,
organization_id,
datetime_added,
added_by,
special_fl,
title_type_id
)
SELECT
'This is new title' as name,
o.organization_id,
CURRENT TIMESTAMP as datetime_added,
1 as added_by,
1 as special_fl,
1 as title_type_id
FROM
organizations o
;
you shouldn't need the column aliases in the select but I am including for readability and good measure.
https://www.ibm.com/support/knowledgecenter/ssw_i5_54/sqlp/rbafymultrow.htm
and for good measure in case you process errors out or whatever... you can also do something like this to only insert a record in title if that organization_id and title does not exist.
INSERT INTO title
(
name,
organization_id,
datetime_added,
added_by,
special_fl,
title_type_id
)
SELECT
'This is new title' as name,
o.organization_id,
CURRENT TIMESTAMP as datetime_added,
1 as added_by,
1 as special_fl,
1 as title_type_id
FROM
organizations o
LEFT JOIN Title t
ON o.organization_id = t.organization_id
AND t.name = 'This is new title'
WHERE
t.organization_id IS NULL
;
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 like initialize a H2 database, but I am not sure if the records exist. If they exist I don't want to do anything, but if they don't exist I would like to write the default values.
Something like this:
IF 'number of rows in ACCESSLEVELS' = 0
INSERT INTO ACCESSLEVELS VALUES
(0, 'admin'),
(1, 'SEO'),
(2, 'sales director'),
(3, 'manager'),
(4, 'REP')
;
MERGE INTO ACCESSLEVELS
KEY(ID)
VALUES (0, 'admin'),
(1, 'SEO'),
(2, 'sales director'),
(3, 'manager'),
(4, 'REP');
Updates existing rows, and insert rows that don't exist. If no key column is specified, the primary key columns are used to find the row.
If you do not name the columns, their values must be provided as defined in the table. If you prefer to name the columns to be more independent from their order in the table definition, or to avoid having to provide values for all columns when that is not necessary or possible:
MERGE INTO ACCESSLEVELS
(ID, LEVELNAME)
KEY(ID)
VALUES (0, 'admin'),
(1, 'SEO'),
(2, 'sales director'),
(3, 'manager'),
(4, 'REP');
Note that you must include the key column ("ID" in this example) in the column list as well as in the KEY clause.
The following works for MySQL, PostgreSQL, and the H2 database:
drop table ACCESSLEVELS;
create table ACCESSLEVELS(id int, name varchar(255));
insert into ACCESSLEVELS select * from (
select 0, 'admin' union
select 1, 'SEO' union
select 2, 'sales director' union
select 3, 'manager' union
select 4, 'REP'
) x where not exists(select * from ACCESSLEVELS);
To do this you can use MySQL Compatibility Mode in H2 database. Starting from 1.4.197 version it supports the following syntax:
INSERT IGNORE INTO table_name VALUES ...
From this pull request:
INSERT IGNORE is not supported in Regular mode, you have to enable MySQL compatibility mode explicitly by appending ;MODE=MySQL to your database URL or by executing SET MODE MySQL statement.
From official site:
INSERT IGNORE is partially supported and may be used to skip rows with duplicate keys if ON DUPLICATE KEY UPDATE is not specified.
Here is another way:
CREATE TABLE target (C1 VARCHAR(255), C2 VARCHAR(255));
MERGE INTO target AS T USING (SELECT 'foo' C1, 'bar') AS S ON T.C1=S.C1
WHEN NOT MATCHED THEN
INSERT VALUES('foo', 'bar')
When a row in S matches one or more rows in T, do nothing. But when a row in S is not matched, insert it. See "MERGE USING" for more details:
https://www.h2database.com/html/commands.html#merge_using