This query needs to do 2 things it’s not doing at the moment: If a h.name is strictly equal to other h.name, it should only select the latest record (where the h.modify_at is the most recent). Currently it selects all “h”). The following line: (EXTRACT(epoch FROM (SELECT (NOW() – date_…
Tag: postgresql
I wonder using INNER JOIN and equality operator is faster or using IN when I try to filter data from a table by another table’s column
While I’m trying to get all accounts, which received message from foo@gmail.com. I want to know about the performance of two following query. or Thanks! Answer Always use the first query in such situations. Don’t use DISTINCT inside an IN clause subquery, though. Don’t try to tell the DBMS h…
Migrate data from SQL Server to PostgreSQL
I have a stored procedure function as well as table in the SQL Server enterprise 2014. I also have data in the table. Now I need same table and data in PostgreSql(pgAdmin4). Can anyone suggest to me the idea to migrate data to POSTGRESQL or any idea on creating the SQL script so that I can use psql to run
INSERT in CASE expression from subselect PostgreSQL
I am trying to create a query like this WITH insert1 as (), … subselect1 as (SELECT (CASE WHEN %s is NOT NULL THEN (INSERT INTO Duration (duration) VALUES (ROW (%s, %s)) …
Postgresql select column with minimum value of hierarchical parents
Having a table like this Table “public.access_level” Column | Type | Modifiers | Storage | Stats target | Description ———–+———+———–+———-+——…
Extract values from JSON with nesting
I have a problem with taking all values under the “id_ref_directory” keys. I have a temp table: CREATE LOCAL TEMP TABLE parsed_json( var_key text, var_value text NOT NULL) ON COMMIT DROP; …
How extract jsonb column in fields by key
I’m using postgresql and postgis plugin. I have stored data with this scheme: table_id is primary key, properties is a jsonb and geom as geometry(GeometryZ,4326); If I make this request: select table_id, properties, geom from nametable return all info with table_id as integer, properties as jsonb and ge…
Select multiple columns with not all columns mentioned in Groupby – Postgres v12
I have a table which contain review_id,product_id,ratings,reviewer_id,review_comments. The table i have is as below. My need is quite simple but I have issues figuring it out. Need is to get …
SQL for 2 tables
I have these 2 tables: Table A Country State —————– US OH US FL US WA Table B State LastVisitDate City ———————————- OH …
Trying to update column on postgresql
I am trying to update my table from another tmp table called fake_email but when I ran the following: update users SET email = fake_email2.email FROM fake_email2 where users.id = fake_email2.id I …