- #Postgresql insert into table multiple rows how to
- #Postgresql insert into table multiple rows update
Columns added by a FROM clause are invisible there. Unfortunately, the RETURNING clause of an INSERT can only work with columns from the inserted row. SELECT * FROM copy_one, copy_two, copy_three Įxpected results of duplicating lvl_one.id=1įollowing rows will be created in all 3 tables as a result of "duplicating" lvl_one.id=1 row. RETURNING id AS new_three_id, copied_from_id INNER JOIN lvl_three ON lvl_three.lvl_two_id = lvl_two.id
INNER JOIN lvl_two ON lvl_two.id = copy_two.copied_from_id
SELECT new_two_id, lvl_three.name, lvl_three.id AS copied_from_id INSERT INTO lvl_three(lvl_two_id,name,copied_from_id) RETURNING id AS new_two_id, copied_from_id INNER JOIN lvl_two ON lvl_two.lvl_one_id = lvl_one.id INNER JOIN lvl_one ON lvl_one.id = copy_one.copied_from_id SELECT new_one_id, lvl_two.name,lvl_two.id AS copied_from_id INSERT INTO lvl_two(lvl_one_id,name,copied_from_id) RETURNING id AS new_one_id, copied_from_id copy row id=1 from lvl_one and all its child tables Solution (with adding extra column) ALTER TABLE lvl_one ADD COLUMN copied_from_id bigint ĪLTER TABLE lvl_two ADD COLUMN copied_from_id bigint ĪLTER TABLE lvl_three ADD COLUMN copied_from_id bigint
LEFT OUTER JOIN lvl_three AS three ON two.id = three.lvl_two_id LEFT OUTER JOIN lvl_two AS two ON one.id = two.lvl_one_id , three.id AS three_id, three.name AS three_name INSERT INTO lvl_three(lvl_two_id, name) VALUES (1,'door'), (1,'window'), (3,'trunk') INSERT INTO lvl_two(lvl_one_id, name) VALUES (1,'Civic'), (1,'Passport'), (3,'Prius') INSERT INTO lvl_one(name) VALUES ('Honda'), ('Ford'), ('Toyota') Id bigint NOT NULL GENERATED ALWAYS AS IDENTITY,ĬREATE TABLE IF NOT EXISTS public.lvl_two (ĬONSTRAINT lvl_two_lvl_one_id_fk FOREIGN KEY (lvl_one_id)ĬREATE TABLE IF NOT EXISTS public.lvl_three (ĬONSTRAINT lvl_three_pk PRIMARY KEY (id),ĬONSTRAINT lvl_three_lvl_two_id_fk FOREIGN KEY (lvl_two_id) Setup -DROP TABLE IF EXISTS lvl_one,lvl_two,lvl_three CASCADE ĬREATE TABLE IF NOT EXISTS public.lvl_one (
#Postgresql insert into table multiple rows how to
I did see this answer by Brandstetter but his example only has 1 parent and child and I was not sure how to extend this to multiple levels Example Is there a way to accomplish the same without extra column? I was able to accomplish this by adding an extra column ( copied_from_id). I tried "cascading"-insert CTEs, but ran into issues where RETURNING is limited to return only inserted data, while I need extra information to connect the next INSERT. Given root parent table ID, insert duplicate rows for it and all of its children. I would like to "cascade"-insert duplicate rows based on root parent table row selection.Įach table has IDENTITY primary key and each child table has FK to its parent ID (one level up). Try Ubiq for free.Imagine multiple parent-child tables with 1:M relationships. Ubiq makes it easy to visualize data, and monitor them in real-time dashboards. Mysql> insert ignore into employees(id, first_name, last_name)Īs you can see, only 1 row was inserted instead of two duplicate rows. Here is an example, mysql> create table employees(id int primary key, However, this works only for tables that have a primary key. If you want to automatically avoid duplicate records when you insert multiple values in your table, use IGNORE keyword after INSERT in your SQL query.
#Postgresql insert into table multiple rows update
mysql> insert into employees2(id, first_name, last_name)Īlso read : How to Update Multiple Columns in MySQL Here is the SQL query to copy data from employees table to employees2 table. Please note, the columns used in the INSERT INTO statement and SELECT statement must have same name and order. In the above query, we select column1, column2, … from table2 and insert them into table1.
Here is the SQL query syntax to copy data from one table to another using INSERT INTO statement. You can also insert multiple rows of data into your table using the result of a SELECT query. mysql> insert into employees(id, first_name, last_name)Īlso read : How to Update a Column based on Another Column Here is the SQL query to insert multiple rows of information in employees table. Next, you need to enter values of each row enclosed in round brackets ‘()’ in a comma-separated manner.Īlso read : How to Copy Data from One Table to Another In the above query, you need to mention your table name into which you need to insert values. Here is the syntax to insert multiple rows using INSERT statement. Let us say you have the following table employees(id, first_name, last_name). We will look at each of these approaches one by one. There are multiple ways to insert multiple rows in MySQL. Here are the steps to insert multiple rows in MySQL. In this article, we will look at how to insert multiple rows in MySQL. MySQL allows you to enter multiple rows of information with a single query. Sometimes you may need to insert multiple rows of data in MySQL.
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