Question : I have a typical tree structure stored as an adjacency list in PostgreSQL 9.4: gear_category ( id INTEGER […]
Tag: count
Trying to Count Multiple Columns SQL
Question : I’m trying to count multiple columns in a select statement for a class I’m in. Everything is coming […]
Count distinct values of a column and insert them to another table
Question : So, I have a database for logs and statistics. But, the amount of data sent is too high, […]
ORDER BY count and Bitmap Heap Scan
Question : I have a table with hits: Column | Type | Modifiers ————–+—————————–+————————————————— id | integer | not null […]
SQL script to count rows for all views in a database with SELECT-only access
Question : I need to know the row count for every view in a third-party database that I have been […]
How to get distinct count on sub table joined via two different way
Question : I have 3 below tables in my db CREATE TABLE main_table ( id SERIAL PRIMARY KEY, name VARCHAR(255) […]
How to count absence days from differents shift?
Question : I have a problem when in the counting of the employee absences depending on different shifts, so all […]
Count Rows that exist before and not after and after but not before
Question : I have an Azure SQL Database, one Table that has 3 Relevant Columns: Brand, ID and Month/Year and […]
PostgreSQL: COUNT(*) uses a sequential scan, not index
Question : Why does PostgreSQL sequentially scans the table for COUNT(*) query, while there is a very small and indexed […]
Join two tables and return data and count in a single query
Question : I have two tables in an SQL Server database, one with two columns and one with four: tbl_email_list […]