PG function of time using a simple database

PG function of time using a simple database

Today my colleagues want to be able to mention a demand for an automated message with some time to update information in the database

Own thinking process before had simply found a bit frustrating not very complicated

1. Set the environment variable to add a default password on the PG

export PGPASSWORD=Test1127?!

Environment variables can be placed inside every time you go so you can use

2. PG bin directory into the environment variable which can execute commands directly.

3. Write a simple SQL statement such as I put here

/ Deploy / SELECT .sql 
content: 
Note that the intermediate connector is a single quote two spaces 
double quotation marks do not know why given 

select patchcode || '' || patchname from gsppatchlog where deployedtime> (current_timestamp - interval '1 day' );

4. Write sql script:

psql -U gscloud -f  /deploy/select.sql >/deploy/PatchUpdatein24hours.txt

5. Modify the script to automatically send e-mail

The attachment name and the word -a attach above plus the family to stay,

 

Here are my Baidu out of the PG function of time, quite useless. 

source:

https://zhidao.baidu.com/question/1768470740987545260.html

 

Current time forward by one day: 
the SELECT CURRENT_TIMESTAMP - interval The ' 1 Day ' 
current push forward a month of time: 
the SELECT CURRENT_TIMESTAMP - interval The ' 1 month The ' 
current push forward time a year: 
the SELECT CURRENT_TIMESTAMP - interval The ' 1 year ' 
current time to pushed forward one hour: 
the SELECT CURRENT_TIMESTAMP - interval The ' . 1 hour ' 
current push forward in time one minute: 
the SELECT CURRENT_TIMESTAMP - interval The ' . 1 min ' 
this is pushed forward 60 seconds: 
the SELECT CURRENT_TIMESTAMP - interval The ' 60 SECOND ' 
query: 
SELECT * from tablename where TO_CHAR(create_time,'yyyy-MM-dd') = TO_CHAR((current_timestamp - interval '1 day'),'yyyy-MM-dd');