In Postgres 9.5, I want to connect to another DB using Postgres' dblink, get data and then use them to update another table.
-- connect to another DB, get data from table, put it in a WITH
WITH temp_table AS
(
SELECT r_id, descr, p_id
FROM
dblink('myconnection',
'SELECT
r_id, descr, p_id
FROM table
WHERE table.p_id
IN (10,20);'
)
AS tempTable(r_id integer, descr text, p_id integer)
)
-- now use temp_table to update
UPDATE anothertable
SET
descr =temp_table.descr
FROM anothertable AS x
INNER JOIN temp_table
ON
x.r_id = temp_table.r_id
AND
x.p_id = temp_table.p_id
AND
x.p_id IN (2) ;
dblink works fine and if I do select * from temp_table before the UPDATE, it has data.
The issue is the UPDATE itself. It runs with no errors, but it never actually updates the table.
I tried changing the UPDATE to:
UPDATE anothertable
SET
descr =temp_table.descr
FROM anothertable AS x , temp_table
WHERE x.r_id = temp_table.r_id
AND
x.p_id = temp_table.p_id
AND
x.p_id IN (2) ;
Same as above: runs with no errors, but it never actually updates the table.
I also tried to change the UPDATE to:
UPDATE anothertable
INNER JOIN temp_table
ON x.r_id = temp_table.r_id
AND
x.p_id = temp_table.p_id
AND
x.p_id IN (2)
SET descr =temp_table.descr
But I get:
ERROR: syntax error at or near "INNER" SQL state: 42601
Character: 1894
How can I fix this to actually update?
Don't repeat the target table in the FROM clause of the UPDATE:
WITH temp_table AS ( ... )
UPDATE anothertable x
SET descr = t.descr
FROM temp_table t
WHERE x.r_id = t.r_id
AND x.p_id = t.p_id
AND x.p_id IN (2);
Or simplified:
...
AND x.p_id = 2
AND t.p_id = 2
The manual:
Do not repeat the target table as a from_item unless you intend a self-join (in which case it must appear with an alias in the from_item).
Related:
UPDATE statement with multiple joins in PostgreSQL
SQL update query with substring WHERE clause
Related
I'm trying to query a cte using a cte called s4 and based on the results either insert or update to another table eventslog. I was unable to do this in one single query and needed to insert the data first in a temp table. I would like to get rid of insertion to a temp table part and just insert or update it directly.
I think I was having issues with calling that cte more than once. Is there a work around? How can I either insert or update into a table by querying a single cte? Any help is most appreciated.
SQL;
,ss4
AS (SELECT DISTINCT h.groupid,
h.eventid,
Sum(h.vcheck) AS tot ,
max(h.eventtime) as eventtime
FROM ss3 h
GROUP BY h.groupid,
h.eventid
)
INSERT INTO #glo
(eventtime,
eventid,
groupid,
vcheck)
SELECT DISTINCT i.eventtime,
i.eventid,
i.groupid,
i.tot
FROM ss4 i
INSERT INTO eventslog
(eventtime,
eventid,
groupid)
SELECT DISTINCT j.eventtime,
j.eventid,
j.groupid
FROM #glo j
WHERE
j.vcheck = 0
AND NOT EXISTS(SELECT eventid
FROM eventslog
WHERE eventid = j.eventid
AND groupid = j.groupid
AND clearedtime IS NULL)
UPDATE k
SET k.clearedtime = l.eventtime
FROM eventslog k
RIGHT JOIN #glo l
ON k.groupid = l.groupid
AND k.eventid = l.eventid
WHERE l.vcheck > 0
AND k.groupid = l.groupid
I was working on something similar myself recently. I used a merge statement to handle doing an insert or update using a CTE.
Example below:
;WITH cte AS
(
SELECT id,
name
FROM [TableA]
)
MERGE INTO [TableA] AS A
USING cte
ON cte.ID = A.id
WHEN MATCHED
THEN UPDATE
SET A.name = cte.name
WHEN NOT MATCHED
THEN INSERT
VALUES(cte.name);
You can use Merge command which is available in SQL 2008,
A very good tutorial is available here
http://www.made2mentor.com/2013/05/writing-t-sql-merge-statements-the-right-way/
Attempting to update a table I have created with null values from another table I have created in PL/SQL:
I was able to utilize the below update in SQL Server but am running into issues within PL/SQL (dont ask why I am running it in both)
Overall_Inventory = Table created with some populated values and some null valuse; this is the table requiring updates to those null values
task_table = Table also created, but contains value needing to be updated into T1
update dbh.overall_inventory
set dbh.overall_inventory.case_due_date = tsk.TASK_ACTION_TIMESTAMP
from dbh.overall_inventory,
(SELECT tsk.INQ_KEY,
min(tsk.TASK_ACTION_TIMESTAMP) as TASK_ACTION_TIMESTAMP
FROM dbh.task_table tsk
inner join dbh.overall_inventory Inv
on tsk.INQ_KEY = inv.inq_key
where tsk.ACTION_CD = '324'
group by tsk.INQ_KEY
) tsk
where tsk.INQ_KEY = dbh.overall_inventory.inq_key`
Oracle doesn't support from clause in the update statement. In this situation merge statement can be used.
merge into overall_inventory oi
using (select tsk.inq_key,
min(tsk.task_action_timestamp) as task_action_timestamp
from task_table tsk
join overall_inventory Inv
on tsk.inq_key = inv.inq_key
where tsk.action_cd = '324'
group by tsk.inq_key) tsk
on (tsk.inq_key = oi.inq_key )
when matched then
update
set case_due_date = tsk.task_action_timestamp
where case_due_date is null -- as I understood only NULL values
-- need to be updated
Note: Not tested because no sample data and desired result were provided.
I think you're looking for update over a select:
UPDATE (
SELECT product_id, category_id
FROM product) st
SET st.category_id = 5
WHERE st.category_id = 4;
I am writing an Update trigger and am struggling with the Update statement:
The statement is as below:
UPDATE ARGUS_APP.CMN_REG_REPORTS CARR
SET CARR.DATE_SUBMITTED =
(
SELECT To_Date(M.ACKNOWLEDGMENTHEADER.MESSAGEDATE,'YYYYMMDDHH24MISS') Messagedate
FROM esm_owner.MESSAGES M
WHERE M.ACKNOWLEDGMENTHEADER.MESSAGESENDERIDENTIFIER='PMDA'
)
WHERE CARR.DATE_SUBMITTED =
(
SELECT CARR.DATE_SUBMITTED
FROM esm_owner.safetyreport sr,esm_owner.MESSAGES M,ARGUS_APP.CMN_REG_REPORTS CARR
WHERE sr.report_id=CARR.esm_report_id
AND M.msg_id = sr.msg_id
AND M.ACKNOWLEDGMENTHEADER.MESSAGESENDERIDENTIFIER='PMDA'
)
I get ORA:01427 everytime.
The Table structure is as below:
I have 3 tables
ARGUS_APP.CMN_REG_REPORTS CARR .............having the columns DATE_SUBMITTED(which I want to update) and esm_report_id which joins with the report_id of safety report
ESM_OWNER.SAFETYREPORT SR............having the columns report_id and MSG_ID(joined with the msg_id of the MESSAGES table)
MESSAGES M ..........having the columns MSG_ID and ACKNOWLEDGMENTHEADER.MESSAGESENDERIDENTIFIER
Please help me resolve this.
I'm going to take a wild stab and guess that this is what you are after. They key feature is correlating the subselects with the update (the carr in the subselects refer to the table in the outer statement).
Update
argus_app.cmn_reg_reports carr
set
carr.date_submitted = (
Select
To_Date(m.AcknowledgmentHeader.MessageDate, 'YYYYMMDDHH24MISS') Messagedate
from
esm_owner.Messages m
inner join
esm_owner.SafetyReport sr
on m.msg_id = sr.msg_id
where
carr.esm_report_id = sr.report_id And
m.AcknowledgmentHeader.MessageSenderIdentifier = 'PMDA'
)
Where
Exists (
Select
'x'
From
esm_owner.Messages m
Inner Join
esm_owner.SafetyReport sr
on m.msg_id = sr.msg_id
Where
carr.esm_report_id = sr.report_id and
m.AcknowledgmentHeader.MessageSenderIdentifier = 'PMDA'
)
Here's an example showing the basic principle works:
Example Fiddle
It looks like one of your subqueries is probably returning more than one row of data. You could perhaps check this by running each on its own.
If you want the update to apply to them all, change the
... = (SELECT...
to
... IN (SELECT ...
I have two tables. user and user_new
the user contains the old data.
the user_new contains the new data.
I want to sync the user_new to user.
if the data exist in user_new and not exist in user,then insert to user.
if the data exist in user and user_new, then update.(compare with the column id)
what's the fast sql to do it?
This works on any server version -
-- 1) Insert new record
INSERT INTO old_table(id, column)
SELECT n.id, n.column
FROM new_table n
LEFT JOIN old_table o ON n.id = o.id
WHERE o.id IS NULL
-- 2) Update existed record
UPDATE o
SET column = n.column
FROM old_table o
JOIN new_table n ON n.id = o.id
From Sql Server 2008 onwards you can use Merge syntax
MERGE user target
USING user_new source
ON taget.ID = source.ID
WHEN MATCHED THEN
UPDATE
SET target.Column= source.Column1,target.column2=source.column2
WHEN NOT MATCHED BY TARGET THEN
INSERT (ID,Column1,Column2)
VALUES (source.ID,source.column1,source.column2);
or you can use the below query
INSERT INTO user(ID,column1,column2)
SELECT ID,column1,column2 FROM user_new AS source
WHERE NOT EXISTS (SELECT * FROM user WHERE ID = source.ID);
UPDATE target SET ...
FROM user AS target
INNER JOIN user_new AS source
ON target.ID = source.ID;
Sounds like you might need a Merge if you have sql server 2008+.
You can't do insert and update in a single query you have to do in seperate
select * from user where user_id not in (select user_new.user_id from user_new )
this query results the data for insert query similarly u have to update by replacing not in to in
I have the following SQL statement to simply update the #temp temp table with the latest package version number in our Sybase 15 database.
UPDATE t
SET versionId = l.latestVersion
FROM #temp t INNER JOIN (SELECT gp.packageId
, MAX(gp.versionId) latestVersion
FROM Group_Packages gp
WHERE gp.groupId IN (SELECT groupId
FROM User_Group
WHERE userXpId = 'someUser')
GROUP BY gp.packageId) l
ON t.packageId = l.packageId
To me (mainly Oracle & SQL Server experience more than Sybase) there is little wrong with this statement. However, Sybase throws an exception:
You cannot use a derived table in the FROM clause of an UPDATE or DELETE statement.
Now, I don't get what the problem is here. I assume it is because of the aggregation / GROUP BY being used. Of course, I could put the sub query in a temp table and join on it but I really want to know what the 'correct' method should be and what the hell is wrong.
Any ideas or guidance would be much appreciated.
It seems that SYBASE doesn't support nested queries in UPDATE FROM class. Similar problem
Try to use this:
UPDATE #temp
SET versionId = (SELECT MAX(gp.versionId) latestVersion
FROM Group_Packages gp
WHERE gp.packageId=#temp.packageId
and
gp.groupId IN (SELECT groupId
FROM User_Group
WHERE userXpId = 'someUser')
)
And also what if l.latestVersion is NULL? Do you want update #temp with null ? if not then add WHERE:
WHERE (SELECT MAX(gp.versionId)
....
) is not null
I guess this is a limitation of Sybase (not allowing derived tables) in the FROM clause of the UPDATE. Perhaps you can rewrite like this:
UPDATE t
SET t.versionId = l.versionId
FROM #temp t
INNER JOIN
Group_Packages l
ON t.packageId = l.packageId
WHERE
l.groupId IN ( SELECT groupId
FROM User_Group
WHERE userXpId = 'someUser')
AND
l.versionId =
( SELECT MAX(gp.versionId)
FROM Group_Packages gp
WHERE gp.groupId IN ( SELECT groupId
FROM User_Group
WHERE userXpId = 'someUser')
AND gp.packageId = l.packageId
) ;
Your table alias for #temp is called "t" and your original table is called "t".
My guess is that this is the problem.
I think you want to start with:
update #temp
Does this syntax work in Sybase?
update dstTable T
set (T.field1, T.field2, T.field3) =
(select S.value1, S.value2, S.value3
from srcTable S
where S.key = T.Key);
I believe the correlated subquery can be as complicated as you like (including using CTE. etc). It just has to project the right number (and type) of values.