I have a table like: create table movement_logs ( id integer NOT NULL, room_id integer NOT NULL, entry_time timestamp NOT NULL, exit_time timestamp, user_id integer NOT NULL ) This models a domain where users enter rooms. This table logs timestamps…
My table looks like this: Name Date of Birth John 02-02-1990 15:30 Esther 05-05-1980 13:30 Mark 07-10-1980 12:30 I want a query that returns this. Age Count 33 1 43 2 I've seen other solutions like what we have here…
I have a JSON dataset and it is in array format. I have to make a table in Postgres-SQL and then store the data into it. I haven't ever worked with this complex data. I am trying to figure out…
This is my custom field that I call in a model. Migrations succeed and I'm able to insert an encrypted value into the data table. However, it will not decrypt. Here's the custom field class: class SecureString(CharField): """Custom Encrypted Field"""…
I have the following result of a query: P2_AU_CE P2_03 P2_AU_CE P2_04 P2_CN_MOCE_001 P2_04 I would like to have the result shown this way instead: P2_AU_CE P2_03 P2_04 P2_CN_MOCE EMPTY P2_04
Given a directed acyclic graph shaped like this: "Branch A" "Branch B" branch-a-head-id branch-b-head-id --- | | ^ id-Z id-C | | | | id-Y id-B | | | "Branch A" id-X id-A and | | "Branch B" branch-a-first-id branch-b-first-id…
I have a table CREATE TABLE cities ( id serial, name character varying(30) ); Then, some rows were added. In order to make the queries faster, an index was defined: CREATE INDEX cities_name_idx ON cities (name); SET enable_seqscan TO off;…
I want to get the next 10 values of the SEQUENCE at once. I can get those individually by calling SELECT setval('myseq', ...); -- Next nextval will return 43 10 times back to back. On Microsoft SQL server, I can…
My PostgreSQL-table: CREATE TABLE "Scheme"."TableName" ( "ID" serial4 NOT NULL, "ID-XyzPlist_fkey" int4 NOT NULL, "ID-Xyz_fkey" int4 NOT NULL, CONSTRAINT "TableName_pkey" PRIMARY KEY ("ID"), CONSTRAINT "TableName_ID-XyzPlist_fkey_fkey" FOREIGN KEY ("ID-XyzPlist_fkey") REFERENCES ...), CONSTRAINT "TableName_ID-Xyz_fkey" FOREIGN KEY ("ID-Xyz_fkey") REFERENCES ...) ); There are…
update 20M records in table and set col1 = col2 + col3 for each record using spring boot. try (Connection connection = dataSource.getConnection()) { String updateQuery = "UPDATE table SET col1 = ? WHERE id = ?"; PreparedStatement preparedStatement =…