What would be the correct syntax in Postgres to do something like: SELECT ARRAY[4,5,6] IN ARRAY[[4,5,6],[7,8,9]]; Some dbs have a list_contains or IN UNNEST(arr_expr) to do something like the above but I haven't been having luck checking in Postgres docs.
I am designing a DB schema for a meal planning application. Each meal plan consists of blocks (2 months of diet, 2 months of bulking), each block of meals for the day, each meal of the day of foods. I…
create table phone_log(phone_number CHAR(20) NOT NULL, area_code CHAR(10)); INSERT INTO phone_log(phone_number) VALUES ('310-430-9201'); INSERT INTO phone_log(phone_number) VALUES ('917-829-2876'); INSERT INTO phone_log(phone_number) VALUES ('424-917-1055') How do I insert the area code of each phone number using the SUBSTRING FUNCTION for each…
There is table in postgres db: event_stats_table id: pk int rank: int rank_delta: int event_id: int user_id: int Every record saves user position for every event. I am trying to write a query which would update rank_delta fields for all…
Consider that I have a table t1 in my postgres database like so: CREATE TABLE t1 ( id SERIAL PRIMARY KEY, col_2 TEXT DEFAULT "foo", col_3 TEXT NOT NULL DEFAULT "bar", ... col_X INTEGER NOT NULL DEFAULT 42 ); And…
I have the following query: delete from customers_cards where id not in ( select min(id) from customers_cards group by number_card ) and belongs_to = "ezpay" It throws: #1093 - You can't specify target table 'customers_cards' for update in FROM clause…
I'm trying to think of the most efficient way to check if data from one table has changed in another. Ex: Table a id name age 111 John 30 222 Jill 32 Table b id name age 111 John 30…
I'm using MySQL 8.2 and I've got a table called records for which I added the following index in order to perform text search on it: CREATE FULLTEXT INDEX all_records_idx ON records (`title`, `label`, `description`, `catalog_number`,`barcode`); Now, I've got the…
I've a sample dataset order_num order_date email product_id 101 2023-06-01 [email protected] 1 101 2023-06-01 [email protected] 2 222 2023-06-02 [email protected] 1 333 2023-06-03 [email protected] 3 434 2023-06-05 [email protected] 3 444 2023-06-01 [email protected] 1 444 2023-06-01 [email protected] 2 677 2023-06-02 [email protected] 3…
I have two tables, one named user and the other named payment. A user can have multiple payments. example: user 1 with 2 payments user 2 with 5 payments user 3 with 10 payments user 4 with 7 payments I…