I'm trying to figure out how to set a column to true when other columns from the query be true. I have two tables called products and families. A family can have a lot of products and a product can…
Is there anything one cannot do (and then rollback safely) in transaction? My transaction is a simple test of a major, disruptive change in a production database. The SQL code wrapped in a transaction consists of statements such as below.…
In postgres, I have two tables: blog and blog_history. blog_history is to keep track of users and which blogs they read. Tables structures are as follows: blog table: CREATE TABLE blog ( id serial PRIMARY KEY, title text, description text,…
Is it possible to make eloquent generate a query with a WHERE clause precisely like the example in the title? The closest I got was with Where() and orWhere(), but that outputs (column_1 IS NOT NULL OR column_2 IS NOT…
I have 2 tables... crew_availability (ca) which has id(INT), admin_id(INT) and usable_date(DATE) fields. reservations (r) which has id(INT), ride_id(INT), admin_id(INT) and ride_date(DATE) fields. The following EXCEPT query provides expected result in that it gives remaining crew availability. SELECT ca.admin_id, ca.usable_date…
I have the following code with my_table (id, student, category, score) as (values (1, 'Alex', 'A', 11), (2, 'Alex', 'D', 4), (2, 'Alex', 'B', 50), (2, 'Alex', 'C', 83), (2, 'Alex', 'D', 5), (3, 'Bill', 'A', 81), (6, 'Carl', 'C',…
We have a couple of staging tables for Data in mysql db that we read from a input file. In the first table, the data is dumped as is. This data is then processed and grouped in certain ways and…
Let's assume the table has 110 rows. The following skips the first 10 rows and returns the other 100: SELECT ... FROM ... ORDER BY ... LIMIT 10, 100 Is there a way to replace 100 by whatever is left?…
I'm evaluating a query performance and came to a curious finding.... I'm trying to get the count of items created today grouped by a column Pretty simple SQL query: SELECT count(id), total_units_sold FROM public.items x WHERE created_at > current_date GROUP…
I was wondering why this line that is underlined in red isnt AVG(tenure) OVER() AS avg_tenure? The output table is correct the way it is below, but not sure when we should use AVG() normally vs. AVG() OVER() as a…