I have a destination table that needs to be updated with the values that match from my source. I would like my destination to have the same CarValue as my source table would have. I have came up with the query above to pull the records that do not match my source and I want to use this to update my destination table values. Please provide examples of how to accomplish this.
select
s.*
,t.*
from SourceTable as s
full outer join DestinationTable as t
on s.CarNo = t.CarNo and s.CarName = t.CarName
where s.CarValue <> t.Carvalue
You do not need a full join. So:
update t
set carvalue = s.carvalue
from DestinationTable t join
SourceTable s
on s.CarNo = t.CarNo and s.CarName = t.CarName
where s.CarValue <> t.Carvalue;
This does not update non-matching rows. My guess is that you want to leave those alone. If you do want to update them, use a left join and remove the where clause.
You can update by using the current join statement
update t
set t.CarValue = s.Carvalue
from DestinationTable as t
full outer join SourceTable as s
on s.CarNo = t.CarNo and s.CarName = t.CarName
where s.Carvalue<>coalesce(t.Carvalue,'xYz');
coalesce() is added for the probability of existence of null values within the DestinationTable, assuming a car value never would be xYz.
Demo
Related
Im trying to update two fields from table into two fields of the same name/datatype in another table. wont work!Here my SQL
UPDATE tblEmployeesTemplateTest INNER JOIN tblPersonalWsInDS ON
tblEmployeesTemplateTest.EMPGivenNameLegal = tblPersonalWsInDS.EMPGivenNameLegal
SET tblPersonalWsInDS.EMPGivenNameLegal =
[tblEmployeesTemplateTest].[EMPGivenNameLegal],
tblPersonalWsInDS.EMPSurnameLegal =
[tblEmployeesTemplateTest].[EMPSurnameLegal];
This will not update any of the fields.
You always need to update a single table. So you need to use:
UPDATE <table>
SET <field> = <value>
...
FROM <other table/join>
WHERE <conditions>;
No explicit JOIN here, just the second table in the FROM and the join condition in the WHERE.
AFAICT the JOIN should be syntactically forbidden. I am surprised the query ran and did nothing instead of erring out.
If I am not wrong, your query should be formed like below
UPDATE TPW
SET TPW.EMPGivenNameLegal = TET.[EMPGivenNameLegal],
TPW.EMPSurnameLegal = TET.[EMPSurnameLegal]
FROM tblPersonalWsInDS AS TPW
INNER JOIN tblEmployeesTemplateTest AS TET
ON TET.EMPGivenNameLegal = TPW.EMPGivenNameLegal;
The Problem
I need to write an Update query where my SET references an outer joined table.
I can do this fairly easily with SQL Server but I'm having a heck of a time figuring out the syntax in Oracle as I'm only allow a single table in an update query.
I have written the following Oracle query:
UPDATE SalesExt_tmp tmp
SET slsrep = (SELECT three_dig_rep
FROM dw_sls_rep_conv sls
WHERE sls.aims_rep = tmp.slsrep)
WHERE EXISTS (SELECT three_dig_rep
FROM dw_sls_rep_conv sls
WHERE sls.aims_rep = tmp.slsrep)
AND tmp.sysind = 'AIM';
This takes care of the intersection but I need to deal with values in SalesExt_tmp that do not have equivalent matches in dw_sls_rep_conv (I plan to add a case statement to set null values to a default value). To do this I need to set up dw_sls_rep_conv as an outer joined table. But this is where I get stuck.
SQL Server Example
In SQL Server the solution is a piece of cake as you can have multiple tables in an Update Query:
UPDATE SalesExt_tmp tmp
LEFT JOIN dw_sls_rep_conv sls ON sls.aims_rep = tmp.slsrep
SET tmp.slsrep = sls.three_dig_rep
WHERE tmp.sysind = 'AIM';
But I can't for the life of me figure out how to do this in Oracle. I understand that this query will allow my slsrep field to be set to NULL in some occasions which causes me to fear that this operation may not be allowed.
Questions
1) Firstly is this possible in Oracle? (It's got to be, right?)
2) How do I need to restructure my query to pull this off? I'm guessing my WHERE EXISTS clause needs to go... but I'm still stuck as to where to place my JOIN.
If I understood you correctly, you want to set the value to NULL if there is no match in the dw_sls_rep_conv table? If so, just drop your EXISTS condition and all the rows will be updated:
UPDATE SalesExt_tmp tmp
SET slsrep = (SELECT three_dig_rep
FROM dw_sls_rep_conv sls
WHERE sls.aims_rep = tmp.slsrep)
WHERE tmp.sysind = 'AIM';
If there is a match in the dw_sls_rep_conv table, then the slsrep column will be updated with selected value, otherwise, with NULL.
Have you considered using a subquery in your where clause that performs the outer join as you stated like this:
UPDATE SalesExt_tmp tmp
SET slsrep = (SELECT three_dig_rep
FROM dw_sls_rep_conv sls WHERE sls.aims_rep = tmp.slsrep)
WHERE
tmp.rowid in
(SELECT tmp1.rowid
FROM SalesExt_tmp tmp1,
dw_sls_rep_conv sls
WHERE
tmp1.slsrep = sls.aims_rep (+)
AND tmp1.sysind = 'AIM' );
I need to copy a column from one table to another. The problem is matching the values with the right rows.
INSERT INTO DestinationTable (money_owed)
SELECT "credit"
FROM SourceTable
How do I search through the destination table and compare another field to see if it's the same one in the source table?
You need to join the two tables on the matching condition.
Something like this
UPDATE
DestinationTable
SET
DestinationTable.money_owed = SourceTable.Credit
FROM
DestinationTable
INNER JOIN SourceTable
ON DestinationTable.Field2 = SourceTable.Field2
do an Update from:
UPDATE
destination
SET
destination.money_owed = source.Credit
FROM
destination
INNER JOIN
source
ON
source.id = destination.id
I have two tables,
SELECT [SHADOW_ID]
,[DATA]
,[TSN]
,[HEALTH_PLAN_CATEGORY_VALUE_ID]
FROM [stbl834]
and
SELECT [HEALTH_PLAN_CATEGORY_VALUE_ID]
,[TSN]
FROM [uvwCLIENT_HEALTH_PLAN]
Right now HEALTH_PLAN_CATEGORY_VALUE_ID are all set to NULL in stbl834, I need to fetch these values from uvwCLIENT_HEALTH_PLAN based on different TSN values from stbl834. Is there a way to do this using JOIN statements? I need to avoid any sort of loops.
First run a select
SELECT *
FROM [stbl834] A
INNER JOIN [uvwCLIENT_HEALTH_PLAN] B ON A.TSN = B.TSN
and verify that you have correct number of rows and that the values in the columns match. this would ensure that you have a correct join key. If this looks correct use the below update
UPDATE [stbl834]
SET [HEALTH_PLAN_CATEGORY_VALUE_ID] = B.[HEALTH_PLAN_CATEGORY_VALUE_ID]
FROM [stbl834] A
INNER JOIN [uvwCLIENT_HEALTH_PLAN] B ON A.TSN = B.TSN
Select HEALTH_PLAN_CATEGORY_VALUE_ID, TSN
from stbl834 left join uvwCLIENT_HEALTH_PLAN
on stbl834.TSN=uvwCLIENT_HEALTH_PLAN.TSN
Do you need to insert them into stbl834? If so --
update stbl834
set HEALTH_PLAN_CATEGORY_VALUE_ID = uvwCLIENT_HEALTH_PLAN.HEALTH_PLAN_CATEGORY_VALUE_ID
from stbl834 left join uvwCLIENT_HEALTH_PLAN
on stbl834.TSN=uvwCLIENT_HEALTH_PLAN.TSN
Alternatively, you can do this for any RDBMS that does not support the UPDATE..FROM syntax:
UPDATE stbl834
SET health_plan_category_value_id = (SELECT health_plan_category_value_id
FROM uvwclient_health_plan
WHERE uvwclient_health_plan.tns = stbl834.tns)
This solution is SQL Ansi compatible, meaning it will work for any RDBMS. Please make sure the sub-query (SELECT) will only return record value for a given TNS, or else you will have to ensure that by using TOP or LIMIT (whatever is supported by your RDBMS).
You can try out this too, this might serve your purpose.
update stbl834
set stbl834.HEALTH_PLAN_CATEGORY_VALUE_ID= uvwCLIENT_HEALTH_PLAN.HEALTH_PLAN_CATEGORY_VALUE_ID
inner join uvwCLIENT_HEALTH_PLAN.TSN=HEALTH_PLAN_CATEGORY_VALUE_ID.TSN
I have two tables in Database , I need to select a field from one table and update it in another table with a condition where id is same .. Is it Possible to write in single query ???
This should work for you:
update storage
set storage.email = (select register.email
from register
where register.id = storage.id)
Yeah it is, you could do this for example:
UPDATE Origin SET DesiredColumn = NewValue
FROM Origin
JOIN NewTable ON Origin.Id = NewTable.Id
And guess the column names were like DesiredColumn in the updating table and NewValue in the table that holds the new value.
Yes, this is possible, although the syntax depends on the type of SQL you are using.
Here is an example for T-SQL (for Microsoft SQL Server)
UPDATE
S
SET
Email = R.Email
FROM
dbo.Register R
INNER JOIN dbo.Storage S
ON S.RegisterID = R.RegisterID