Update from select postgresql Code Answer's

The Postgresql database is a relational database management system (RDBMS), meaning that it stores data in tables, which are collections of related data. Each table has a name and contains different types of data. One of the most common table types is called a "query table", which is simply a table that contains all the information needed to run one or more queries.

postgres update with if condition query

on Jan 01, 1970

update t1
        set t1.current_location =   
        CASE  
			WHEN SUBQUERY.status = 0 THEN 'Deployed' 
			WHEN SUBQUERY.status = 1 THEN 'Retrieved' 
			WHEN SUBQUERY.status = 2 THEN 'Lost' 
            ELSE t1.current_location
		END 
from (
    select t3.serial_number, t2.status
    from t2 inner join t3
        on t2.some_id = t3.some_id
    ) as SUBQUERY

where SUBQUERY.serial_number = t1.serial_number;

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postgres update with if condition query

on Jan 01, 1970

update t1 
  set current_location = 
    case t2.status
        when 0 then 'Deployed'
        when 1 then 'Retrieved'
        when 2 then 'Lost'
    end
from t2 inner join t3
   on t2.some_id = t3.some_id
where t3.serial_number = t1.serial_number;

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update from select postgresql

on Jan 01, 1970

UPDATE
  <table1>
SET
  customer=subquery.customer,
  address=subquery.address,
  partn=subquery.partn
FROM
  (
    SELECT
      address_id, customer, address, partn
    FROM  /* big hairy SQL */ ...
  ) AS subquery
WHERE
  dummy.address_id=subquery.address_id;

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If you're writing an application that needs to interact with other systems, you'll probably want to store some of this same kind of data somewhere else so that other applications can easily access it as well. PostgreSQL provides several ways for doing this.

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Update from select postgresql Code Answer's

postgres update with if condition query

postgres update with if condition query

update from select postgresql

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