I have to cleanup some imported data. Changing some entries to a proper code I use. I have it working but is there a cleaner way than lists of update/sets?
update List
SET STCode = REPLACE(STCode, 'Georgia','GEO')
update List
SET STCode = REPLACE(STCode, 'Louisiana','LOU')
etc...
Provided STCode stores at most one value to be replaced ( no stuff like 'Georgia and Louisiana') lookup table is the solution
update List
set STCode = REPLACE(STCode, replacement.bad, replacement.good)
from List l
join (
values
('Georgia','GEO')
,('Louisiana','LOU')
) replacement(bad, good)
on l.STCode like '%' + replacement.bad + '%'
;
could be using a transalation table with union and a join
UPDATE T1
SET T1.STCode = T2.code
FROM List AS T1
INNER JOIN (
select 'Georgia' name ,'GEO' code
union
select 'Louisiana','LOU'
) T2 on .T1.STCode = T2.name
Related
I'm pretty new to SQL. And I'm trying the following.
I have the following table1 with Columns group and description.
Table1 Example
I want to check if the cell values are partly the same. Like in this case Group101 and Group101D1. Now I want to take the description from the value with D1 and put it in the description column of the one without D1.
And do this for all the cells where the Group value is partly the same.
SELECT [Group]
,[Description]
FROM [Table1]
update [Table1]
set Description = (Select [Description] from [Table1] where [Group] like '%Group101D1%')
where Address like '%Group1%'
This is how far I came. I can make it work for one but have to split it up and make it work for all of them.
Try this query:
WITH cte AS (
SELECT t1.Description AS desc_dest, t2.Description AS desc_src
FROM yourTable t1
INNER JOIN yourTable t2
ON t2.[Group] LIKE t1.[Group] + '[A-Z]%' AND LEN(t1.[Group]) <= 9
)
UPDATE cte
SET desc_dest = desc_src;
Demo
If you simply want to get consistency between all descriptions that only differ in the last two characters, the following should to the trick:
WITH CTE AS
(
SELECT
a.Description
, b.Description AS Descriptionb
FROM
TABLE1 a
JOIN [Table1] b ON LEFT(a.[Group], LEN(a.[Group]) - 2) = b.[Group]
)
update CTE
set Description = Descriptionb
The self-join establishes that we look for all descriptions where the last 2 characters from set a (Group101D1) are removed so we end up with Group101. We then look for a match in set b. If we find it, we set the values of b to match the values in a.
This means the description of Group101D1 will be set to Group101, as would Group101XX. It also should allow for handling of Group1010404D1 to change Group1010404.
Edit: Switched the UPDATE around. I read things wrong and it would have updated the wrong values.
Edit2: As Tim said, my join was wrong. The above should work, though.
My solution is the following:
SELECT [Table1].[Description]
, [Table2].[Description]
,[Table1].[Group]
,[Table2].[Group]
--update [Table1] set [Table1].[Description] = [Table2].[Description]
FROM [BVCIOList_DOW].[dbo].[Table] Table1
INNER JOIN [BVCIOList_DOW].[dbo].[Table] Table2
ON [Table2].[Group] = [Table1].[Group] + 'D1'
I made this view in sql server to combine the values of 2 records of multiple columns. But the problem with this solution is that you need a concat for every column in table2. I would like to know if it is possible to do the concat part with a loop and a dynamic variable for the column numbers (columns in table2 are called 1,2,3,4,5....) of table2.
SELECT
dbo.table1.lot_id AS lot,
dbo.table1.hybird_id AS hybrid,
concat(
LEFT( (SELECT dbo.table2.[1] FROM dbo.table2 WHERE dbo.table2.parentals_id = dbo.table1.parental_male_id AND dbo.table2.lot_id = dbo.table1.lot_id) , 1),
LEFT( (SELECT dbo.table2.[1] FROM dbo.table2 WHERE dbo.table2.parentals_id = dbo.table1.parental_female_id AND dbo.table2.lot_id = dbo.table1.lot_id) , 1)
) AS '1',
--above concat x31 times more
FROM dbo.table2
INNER JOIN dbo.table1 ON dbo.table2.lot_id = dbo.table1.lot_id
GROUP BY dbo.table1.lot_id, dbo.table1.hybird_id,
dbo.table1.parental_male_id,
dbo.table1.parental_female_id
I tried a few things but nothing worked, any ideas?
Try to simplify it a bit, kind of
SELECT lot, hybrid, parental_male_id, parental_female_id
concat(Left(m.[1],1), left(f.[1], 1)) AS [1]
--,..
FROM (
SELECT dbo.table1.lot_id AS lot
, dbo.table1.hybird_id AS hybrid
, dbo.table1.parental_male_id
, dbo.table1.parental_female_id
FROM dbo.table2
INNER JOIN dbo.table1 ON dbo.table2.lot_id = dbo.table1.lot_id
GROUP BY dbo.table1.lot_id, dbo.table1.hybird_id,
dbo.table1.parental_male_id,
dbo.table1.parental_female_id
) t
JOIN dbo.table2 m ON m.parentals_id = t.parental_male_id AND m.lot_id = lot)
JOIN dbo.table2 f ON f.parentals_id = t.parental_female_id AND f.lot_id = lot)
Hi I have the Query Like this :
SELECT TT2.whs_code,
TT2.pdt_code,
TT2.fresh_frozen_status,
TT2.case_dt_yyyymmdd,
TT2.qty_cases,
TT2.qty_wt
FROM #TempTable2 AS TT2
LEFT OUTER JOIN #TempTable AS TT1
ON TT1.whs_code = TT2.whs_code
AND TT1.pdt_code = TT2.pdt_code
AND TT1.fresh_frozen_status = TT2.fresh_frozen_status
AND TT1.case_dt_yyyymmdd = TT2.case_dt_yyyymmdd
The Thing is I want to select the columns in #TempTable2 That are not existed in #TempTable1 based on
whs_code, pdt_code, fresh_frozen_status, case_dt_yyyymmdd
means that lets say a set of data
1,115G,FR,20160222 is in #TempTable1 So If a set of data Say
1,115G,FR,20160223 has to be selected or
1,115G,FZ,20160223 has to be selected or
2,115G,FR,20160223 has to be selected
but not 1,115G,FR,20160222
I would use NOT EXISTS.
SELECT TT2.whs_code,
TT2.pdt_code,
TT2.fresh_frozen_status,
TT2.case_dt_yyyymmdd,
TT2.qty_cases,
TT2.qty_wt
FROM #TempTable2 AS TT2
WHERE NOT EXISTS (
SELECT TOP 1 *
FROM #TempTable AS TT1
WHERE tt1.whs_code = tt2.whs_code
AND tt1.pdt_code = tt2.pdt_code
AND TT1.fresh_frozen_status = tt2.fresh_frozen_status
AND TT1.case_dt_yyyymmdd = TT2.case_dt_yyyymmdd
)
Basically, I want to do this:
update vehicles_vehicle v
join shipments_shipment s on v.shipment_id=s.id
set v.price=s.price_per_vehicle;
I'm pretty sure that would work in MySQL (my background), but it doesn't seem to work in postgres. The error I get is:
ERROR: syntax error at or near "join"
LINE 1: update vehicles_vehicle v join shipments_shipment s on v.shi...
^
Surely there's an easy way to do this, but I can't find the proper syntax. So, how would I write this In PostgreSQL?
The UPDATE syntax is:
[ WITH [ RECURSIVE ] with_query [, ...] ]
UPDATE [ ONLY ] table [ [ AS ] alias ]
SET { column = { expression | DEFAULT } |
( column [, ...] ) = ( { expression | DEFAULT } [, ...] ) } [, ...]
[ FROM from_list ]
[ WHERE condition | WHERE CURRENT OF cursor_name ]
[ RETURNING * | output_expression [ [ AS ] output_name ] [, ...] ]
In your case I think you want this:
UPDATE vehicles_vehicle AS v
SET price = s.price_per_vehicle
FROM shipments_shipment AS s
WHERE v.shipment_id = s.id
Or if you need to join on two or more tables:
UPDATE table_1 t1
SET foo = 'new_value'
FROM table_2 t2
JOIN table_3 t3 ON t3.id = t2.t3_id
WHERE
t2.id = t1.t2_id
AND t3.bar = True;
The answer of Mark Byers is the optimal in this situation.
Though in more complex situations you can take the select query that returns rowids and calculated values and attach it to the update query like this:
with t as (
-- Any generic query which returns rowid and corresponding calculated values
select t1.id as rowid, f(t2, t2) as calculatedvalue
from table1 as t1
join table2 as t2 on t2.referenceid = t1.id
)
update table1
set value = t.calculatedvalue
from t
where id = t.rowid
This approach lets you develop and test your select query and in two steps convert it to the update query.
So in your case the result query will be:
with t as (
select v.id as rowid, s.price_per_vehicle as calculatedvalue
from vehicles_vehicle v
join shipments_shipment s on v.shipment_id = s.id
)
update vehicles_vehicle
set price = t.calculatedvalue
from t
where id = t.rowid
Note that column aliases are mandatory otherwise PostgreSQL will complain about the ambiguity of the column names.
Let me explain a little more by my example.
Task: correct info, where abiturients (students about to leave secondary school) have submitted applications to university earlier, than they got school certificates (yes, they got certificates earlier, than they were issued (by certificate date specified). So, we will increase application submit date to fit certificate issue date.
Thus. next MySQL-like statement:
UPDATE applications a
JOIN (
SELECT ap.id, ab.certificate_issued_at
FROM abiturients ab
JOIN applications ap
ON ab.id = ap.abiturient_id
WHERE ap.documents_taken_at::date < ab.certificate_issued_at
) b
ON a.id = b.id
SET a.documents_taken_at = b.certificate_issued_at;
Becomes PostgreSQL-like in such a way
UPDATE applications a
SET documents_taken_at = b.certificate_issued_at -- we can reference joined table here
FROM abiturients b -- joined table
WHERE
a.abiturient_id = b.id AND -- JOIN ON clause
a.documents_taken_at::date < b.certificate_issued_at -- Subquery WHERE
As you can see, original subquery JOIN's ON clause have become one of WHERE conditions, which is conjucted by AND with others, which have been moved from subquery with no changes. And there is no more need to JOIN table with itself (as it was in subquery).
For those actually wanting to do a JOIN you can also use:
UPDATE a
SET price = b_alias.unit_price
FROM a AS a_alias
LEFT JOIN b AS b_alias ON a_alias.b_fk = b_alias.id
WHERE a_alias.unit_name LIKE 'some_value'
AND a.id = a_alias.id;
You can use the a_alias in the SET section on the right of the equals sign if needed.
The fields on the left of the equals sign don't require a table reference as they are deemed to be from the original "a" table.
For those wanting to do a JOIN that updates ONLY the rows your join returns use:
UPDATE a
SET price = b_alias.unit_price
FROM a AS a_alias
LEFT JOIN b AS b_alias ON a_alias.b_fk = b_alias.id
WHERE a_alias.unit_name LIKE 'some_value'
AND a.id = a_alias.id
--the below line is critical for updating ONLY joined rows
AND a.pk_id = a_alias.pk_id;
This was mentioned above but only through a comment..Since it's critical to getting the correct result posting NEW answer that Works
Here we go:
update vehicles_vehicle v
set price=s.price_per_vehicle
from shipments_shipment s
where v.shipment_id=s.id;
Simple as I could make it.
To add something quite important to all the great answers above, when you want to update a join-table, you may have 2 problems:
you cannot use the table you want to update to JOIN another one
Postgres wants a ON clause after the JOIN so you cannot only use where clauses.
This means that basically, the following queries are not valid:
UPDATE join_a_b
SET count = 10
FROM a
JOIN b on b.id = join_a_b.b_id -- Not valid since join_a_b is used here
WHERE a.id = join_a_b.a_id
AND a.name = 'A'
AND b.name = 'B'
UPDATE join_a_b
SET count = 10
FROM a
JOIN b -- Not valid since there is no ON clause
WHERE a.id = join_a_b.a_id
AND b.id = join_a_b.b_id
a.name = 'A'
AND b.name = 'B'
Instead, you must use all the tables in the FROM clause like this:
UPDATE join_a_b
SET count = 10
FROM a, b
WHERE a.id = join_a_b.a_id
AND b.id = join_a_b.b_id
AND a.name = 'A'
AND b.name = 'B'
It might be straightforward for some but I got stuck on this problem wondering what's going on so hopefully, it will help others.
Here's a simple SQL that updates Mid_Name on the Name3 table using the Middle_Name field from Name:
update name3
set mid_name = name.middle_name
from name
where name3.person_id = name.person_id;
The link below has a example that resolve and helps understant better how use update and join with postgres.
UPDATE product
SET net_price = price - price * discount
FROM
product_segment
WHERE
product.segment_id = product_segment.id;
See: http://www.postgresqltutorial.com/postgresql-update-join/
First Table Name: tbl_table1 (tab1).
Second Table Name: tbl_table2 (tab2).
Set the tbl_table1's ac_status column to "INACTIVE"
update common.tbl_table1 as tab1
set ac_status= 'INACTIVE' --tbl_table1's "ac_status"
from common.tbl_table2 as tab2
where tab1.ref_id= '1111111'
and tab2.rel_type= 'CUSTOMER';
To UPDATE one Table using another, in PostGRE SQL / AWS (SQL workbench).
In PostGRE SQL, this is how you need to use joins in UPDATE Query:
UPDATE TABLEA set COLUMN_FROM_TABLEA = COLUMN_FROM_TABLEB FROM TABLEA,TABLEB WHERE FILTER_FROM_TABLEA = FILTER_FROM_TABLEB;
Example:
Update Employees Set Date_Of_Exit = Exit_Date_Recorded , Exit_Flg = 1 From Employees, Employee_Exit_Clearance Where Emp_ID = Exit_Emp_ID
Table A - Employees Columns in Table A - Date_Of_Exit,Emp_ID,Exit_Flg Table B is - Employee_Exit_Clearance Columns in Table B - Exit_Date_Recorded,Exit_Emp_ID
1760 rows affected
Execution time: 29.18s
--goal: update selected columns with join (postgres)--
UPDATE table1 t1
SET column1 = 'data'
FROM table1
RIGHT JOIN table2
ON table2.id = table1.id
WHERE t1.id IN
(SELECT table2.id FROM table2 WHERE table2.column2 = 12345)
The first way is slower than the second way.
First:
DO $$
DECLARE
page int := 10000;
min_id bigint; max_id bigint;
BEGIN
SELECT max(id),min(id) INTO max_id,min_id FROM opportunities;
FOR j IN min_id..max_id BY page LOOP
UPDATE opportunities SET sec_type = 'Unsec'
FROM opportunities AS opp
INNER JOIN accounts AS acc
ON opp.account_id = acc.id
WHERE acc.borrower = true
AND opp.sec_type IS NULL
AND opp.id >= j AND opp.id < j+page;
COMMIT;
END LOOP;
END; $$;
Second:
DO $$
DECLARE
page int := 10000;
min_id bigint; max_id bigint;
BEGIN
SELECT max(id),min(id) INTO max_id,min_id FROM opportunities;
FOR j IN min_id..max_id BY page LOOP
UPDATE opportunities AS opp
SET sec_type = 'Unsec'
FROM accounts AS acc
WHERE opp.account_id = acc.id
AND opp.sec_type IS NULL
AND acc.borrower = true
AND opp.id >= j AND opp.id < j+page;
COMMIT;
END LOOP;
END; $$;
WORKS PERFECT!!!
POSTGRE SQL - UPDATE With a JOIN
BELOW CODE - Check the positioning of columns and IDs as below:
If you place it exactly as below, then only it will work!
---IF you want to update FIRST table
UPDATE table1
SET attribute1 = table2.attribute1
FROM table2
WHERE table2.product_ID = table1.product_ID;
OR
---IF you want to update SECOND table
UPDATE table2
SET attribute1 = table1.attribute1
FROM table1
WHERE table1.product_ID = table2.product_ID;
This is quite easy and has been asked multiple times but I can't get it to work.
The SQL query I think should work is:
UPDATE table2
SET dst.a = dst.a + src.a,
dst.b = dst.b + src.b,
dst.c = dst.c + src.c,
dst.d = dst.d + src.d,
dst.e = dst.e + src.e
FROM table2 AS dst
INNER JOIN table1 AS src
ON dst.f = src.f
Using the update statement it is not possible because in sqlite joins in an update statement are not supported. See docs:
update statement
If you only wanted to update a single column to a static value, you could use a subquery in the update statement correctly. See this example: How do I make an UPDATE while joining tables on SQLite?
Now in your example, making an assumption that there is a unique key on "column f" - a workaround/solution I have come up with is using the replace statement:
replace into table2
(a, b, c, d, e, f, g)
select src.a, src.b, src.c, src.d, src.e, dest.f, dest.g
from table1 src
inner join table2 dest on src.f = dest.f
I also added an extra column to table2 "column g" to show how you'd "update" only some of the columns with this method.
One other thing to be cautious about is if you use "PRAGMA foreign_keys = ON;" it's possible to have issues with this as the row is effectively deleted and inserted.
I came up with an alternative technique using a TRIGGER and "reversing" the direction of the update, albeit at the cost of a dummy field in the source table.
In general terms, you have a Master table and an Updates table. You want to update some/all fields of records in Master from the corresponding fields in Updates linked by a key field Key.
Instead of UPDATE Master SET ... FROM Master INNER JOIN Updates ON Mater.Key = Updates.Key you do the following:
Add a dummy field TriggerField to the Updates table to act as the focus of the trigger.
Create a trigger on this field:
CREATE TRIGGER UpdateTrigger AFTER UPDATE OF TriggerField ON Updates
BEGIN
UPDATE Master SET
Field1 = OLD.Field1,
Field2 = OLD.Field2,
...
WHERE Master.Key = OLD.Key
END;
Launch the update process with the following:
UPDATE Updates SET TriggerField = NULL ;
Notes
The dummy field is merely an anchor for the trigger so that any other UPDATE Updates SET ... won't trigger the update into Master. If you only ever INSERT into Updates then you don't need it (and can remove the OF TriggerField clause when creating the trigger).
From some rough-and-ready timings, this seems to work about the same speed as REPLACE INTO but avoids the feels-slightly-wrong technique of removing and adding rows. It is also simpler if you are only updating a few fields in Master as you only list the ones you want to change.
It is orders of magnitude faster than the other alternative I've seen to UPDATE ... FROM which is:
UPDATE Master SET
Field1 = ( SELECT Field1 FROM Updates WHERE Mater.Key = Updates.Key ),
Field1 = ( SELECT Field1 FROM Updates WHERE Mater.Key = Updates.Key ),
...
;
Updating six fields over 1700 records was roughly 0.05s for Tony and my methods but 2.50s for the UPDATE ... ( SELECT... ) method.
AFTER UPDATE triggers on Master seem to fire as expected.
As Tony says, the solution is the replace into way but you can use the sqlite hidden field rowid to simulate full update with join like:
replace into table2
(rowid,a, b, c, d, e, f, g)
select dest.rowid,src.a, src.b, src.c, src.d, src.e, dest.f, dest.g
from table1 src
inner join table2 dest on src.f = dest.f
With this you recreate full rows if you don't have primary key for the replace or as standard method to do the updates with joins.
SQLITE does not support UPDATE with INNER JOIN nor do several other DB's. Inner Joins are nice and simple however it can be accomplished using just a UPDATE and a subquery select. By using a where clause and the 'IN' with a subquery and a additional subquery for the 'SET' the same result can always be accomplished. Below is how it's done.
UPDATE table2
SET a = a + (select a from table1 where table1.f = table2.f),
b = b + (select b from table1 where table1.f = table2.f),
c = c + (select c from table1 where table1.f = table2.f),
d = d + (select d from table1 where table1.f = table2.f),
e = e + (select e from table1 where table1.f = table2.f)
WHERE RowId IN (Select table2.RowId from table1 where table1.f = table2.f)
Use below query:
UPDATE table2
SET a = Z.a,
b = Z.b,
c = Z.c,
d = Z.d,
e = Z.e
FROM (SELECT dst.id,
dst.a + src.a AS a,
dst.b + src.b AS b,
dst.c + src.c AS c,
dst.d + src.d AS d,
dst.e + src.e AS e
FROM table2 AS dst
INNER JOIN table1 AS src ON dst.f = src.f
)Z
WHERE table2.id = z.id