Postgresql - use JOIN with UPDATE-CodePudding

I want to UPDATE table row in member_network table using WHERE clause by team_id = 91 and using JOIN.

Main table member_network structure look like:

| id |  network_profile_name |                              
|----------------------------|
|  1 |    John Doe           |

I have two fields in two more connected tables with the values I need.

Table team_member_network structure looks like:

| id | team_member_id | member_network_id |
|----|----------------|-------------------|
|  2 |             1  |                 1 |

Table team_member:

| id    | team_id | member_id |
| ------|---------|-----------|
| 1     |      91 |   1679817 |

This is some kind of reverse relationship

My work so far:

   UPDATE member_network
        SET
            network_profile_name = 'James Bond'
        JOIN team_member_network
            ON member_network.id = team_member_network.member_network_id
        JOIN team_member
            ON team_member_network.team_member_id = team_member.id
        WHERE team_id = 91;

With an error:

Syntax error: 7 ERROR: syntax error at or near "JOIN\

Works on SELECT but how should I use JOIN when updating selected row? Related posts I found did not help in my case..

CodePudding user response：

I don't see why you would need JOIN for this:

UPDATE member_network mn
  SET network_profile_name = 'James Bond'
WHERE EXISTS (SELECT *
              FROM team_member_network tmn
                JOIN team_member tm ON tmn.team_member_id = tm.id
              WHERE mn.id = tmn.member_network_id
                AND tm.team_id = 91);

If you really want to "join" the tables, then you need to do that in the WHERE clause of the UPDATE statement. As documented in the manual you need a FROM clause first - but that should not repeat the target table.

UPDATE member_network mn
  SET network_profile_name = 'James Bond'
FROM team_member_network tmn
  JOIN team_member tm ON tmn.team_member_id = tm.id
WHERE mn.id = tmn.member_network_id --<< this is the "join" to the target table
  AND tm.team_id = 91;

CodePudding user response：

Just remove the comma (,) in the end of the line

network_profile_name = 'James Bond',

then try it should work

CodePudding user response：

It is:

update table1 t1
set t1.field = t2.'value'
from table2 t2
where t1.id = t2.t1_id

In your case:

   UPDATE member_network
        SET
            network_profile_name = 'James Bond'
        FROM team_member
        JOIN team_member
            ON team_member_network.team_member_id = team_member.id
        WHERE team_id = 91 and
            member_network.id = team_member_network.member_network_id