Count the number of records per week

SELECT date_trunc(‘week’, <>) AS “Week” , count(*) 
FROM <> 
GROUP BY 1 
ORDER BY 1;

Found a mistake? Have a question or improvement idea? Let me know.

Dates, Timestamps and Intervals:

* Cast a timestamp or interval to a string

* SELECT the last day of month

* Count the number of records per week

Table Of Contents

0 Getting Started

1 JSON Support

2 Role Management

3 Common Table Expressions WITH

4 Accessing Data Programatically

5 Backup and Restore

6 Table Creation

7 INSERT

8 UPDATE

9 Dates, Timestamps and Intervals

10 Aggregate Functions

11 Programming with PLPGSQL

12 Inheritance

13 High Availability

14 Triggers and Trigger Functions

15 EXTENSION dblink and postgres fdw

16 Window Functions

17 Postgres Tips and Tricks

18 Backup script for a production DB

19 Comments

20 Export to csv

21 Data Types

22 Recursive queries

23 Postgres cryptographic functions

24 Event Triggers

25 SELECT

26 Connect from Java

27 Find String Length

28 COALESCE

29 Contributors