Need help with update SQL with subquery - Database Discussion Boards

Hi,

anyone heard of and tried a mobile app as mysql client for Android?

Thanks,
Jassim

Hi,
I have sql server table containing dates,currency and rates.
For non working dates we dont get rates data, so I need a stored proc to fill these gaps.
for example: for Saturday and Sunday, rates data is not received, so for Sat and Sun data with rates of previous working days i.e. Friday should be entered. Same is the case with public holidays also.
Please provide me with some sample proc.
Any help is appreciated!

Devesh Sinha wrote:
Please provide me with some sample proc.

Asking for the codez is just lazy.

You need to decide if you want linier interpolation or a copy forward methodology. Both are very simple comparing the friday and monday rates and creating the new records as required.

Never underestimate the power of human stupidity
RAH

Hi all! I would like to know how to grant sql server role to another role in a database. I have a role which I have named 'GeneralAdministration' who are headed by another role which I have also named 'HeadsOfAdministration'. Each role has its own members.

Now the problem I am having is that in one of the tasks of those in the 'GeneralAdministration' role, they need to select the member in the 'HeadsOfAdministration' role who gave the authorisation for that task. I want a way to get the list of the members in the 'HeadsOfAdministration' role to be displayed in a combobox so that the one who gave the authorisation can be selected. But I have realised that when members in the 'GeneralAdministration' role log in, the 'HeadsOfAdministration' role is not visible to them.

I get an error in my C# application that 'HeadsOfAdministration' is not a role. I would like to know if there is a way to make the 'HeadsOfAdministration' role visible to those in the 'GeneralAdministration' role so that the one who gave the authorisation can be selected. Thanks in advance.

I seem to remember that SQL Server has some type of an app in which I can create or open a DB file and view the contents, add tables, set keys, add/update/delete records, etc., like one can do in Access. But I don't see it anywhere. Is it in some other installation package?

You need to install the "SQL Server Management Studio". See here[^] for the Express version.

When you install SQL Server, you have to choose 'Management Tools' in the list so that SQL Server Management Studio is installed.

Hi all,

I'm trying to write an update statement with a subquery and can't quite get it right. Hoping you can help. Overall goal of the stored procedure I'm writing is to merge data and make sure I have no duplicates and that the responses associated with a potential duplicate are re-associated with the original record instead of the duplicate.

So......

Basic structure of tables is this:

Rosters table - contains all of the rosters in the database
RosterEntries table - contains a single record for each person in a roster. FK here is back to the rosters table.
ParticipantResponses - contains a record for each response a person gave. FK here is back to the RosterEntries table.

I am merging the rosters. So when I'm done, there will be one roster where there were two. During the merge, I need to make sure that no entries in the RosterEntries table is duplicated and also make sure that the responses that are tied to a duplicate record are reassociated with the original, not the duplicate.

I have an @Existing table variable. This is a subset of the RosterEntries table and it contains only those records that are associated with the original roster.

I have the @Dupes table variable. This is a subset of RosterEntries that contains only those records from the roster to be merged (the one that will be going away) which are duplicates of those already in the RosterEntries table.

So, let's say James Kirk is in the RosterEntries table twice, once associated with RosterID1 and once associated with RosterID2. RosterID2 is going away. So James Kirk's first record would be in my @Existing table variable. James Kirk's 2nd record will be in my @Dupes table and this is the one I want to get rid of. But before I do that, I have to associate his responses with that first record (the RosterID1 one) so I don't have orphaned responses. Basically, I'm trying to replace the FK in ParticipantResponses so that it points to Kirk's first record (RosterID1 record) not the 2nd one (RosterID2 record)

The SQL statement I've been working on is this:

SQL

update participantresponses pr, @dupes d 
set pr.rostEntID = 
(
	select e.recid 
	from @Existing e, @dupes d2
	where
			e.refid = d2.refid
		and	e.palias = d2.palias
		and e.palias2 = d2.palias2
		and e.pweight = d2.pweight
		and e.pHandicap = d2.phandicap
		and e.loginID = d2.loginid
		and e.password = d2.password
) 
where pr.rostEntID = d.recID

(I know... there's a lot of where clause activity in the subquery, but that's the specs... dupes are defined as those where all of those fields are equal. Same criteria was used to fill the @Dupes table)

The way I read this (obviously not quite right) is that I want to update the PR table, setting the PR.RostEntID = the recordID from the existing table where that existing entry matches the one in the dupes table.

The error I'm getting is:

Msg 102, Level 15, State 1, Line 125
Incorrect syntax near 'pr'.
Msg 156, Level 15, State 1, Line 139
Incorrect syntax near the keyword 'where'.

Could y'all help me figure out what I'm doing wrong and/or how I can get this replacement made? I know I could do it with a loop and that's probably what I'll end up doing for now but I just KNOW there has to be a way to batch process this.

Thanks in advance!

-- Denise

If you are using SQL Server then try

SQL

update pr 
set rostEntID =
(
    select TOP 1 e.recid
    from @Existing e, @dupes d2
    where
            e.refid = d2.refid
        and e.palias = d2.palias
        and e.palias2 = d2.palias2
        and e.pweight = d2.pweight
        and e.pHandicap = d2.phandicap
        and e.loginID = d2.loginid
        and e.password = d2.password
)
FROM participantresponses pr 
INNER JOIN @dupes d
ON pr.rostEntID = d.recID

Notice the TOP 1 was added to prevent multiples.

That did it! Thanks a million!!!

Denise Duggan

I have as table like
TheDate
Type
Value

I need to retreive the last value for each type.

I try a SQL command like
SELECT MAX(TheDate), Type, Value from MyTable GROUP BY Type

But I receive an error :
Erreur SQL : ORA-00979: not a GROUP BY expression
00979. 00000 - "not a GROUP BY expression"

Do you have any idea ?

I would try

SQL

SELECT MAX(TheDate), Type, Value 
FROM MyTable 
GROUP BY Type, Value

Lobster Thermidor aux crevettes with a Mornay sauce, served in a Provençale manner with shallots and aubergines, garnished with truffle pate, brandy and a fried egg on top and Spam - Monty Python Spam Sketch

Thanks for the idea, but it's not enought because the values are diffrent.

I receive in this case :

MAX(TheDate), Type, Value
2011/08/11 , T1 , 10
2011/08/17 , T1 , 12
2011/09/25 , T1 , 11
2011/08/15 , T2 , 10
...

And I only need the last value for T1, T2, ... !

Mike

modified 26-Oct-11 8:09am.

Then you need to remove the Value column from the query.

SQL

SELECT MAX(TheDate), Type
FROM   MyTable
GROUP BY TYPE

But then you don't get the value.
So join the result from this query with the original table.

SQL

WITH maxdate AS (
    SELECT MAX(TheDate) TheDate, Type
    FROM MyTable
    GROUP BY Type
    )
SELECT  t.TheDate, t.Type, t.Value
FROM    MyTable t join maxdate d
    ON  t.TheDate = d.TheDate
    AND t.Type = d.Type

Light moves faster than sound. That is why some people appear bright, until you hear them speak.
List of common misconceptions

Super,

It's working Wink | ;)

Thanks

If you get performance issues on this query you will need a composite index on (Type,TheDate)

Light moves faster than sound. That is why some people appear bright, until you hear them speak.
List of common misconceptions

Heres a query using Rank as suggested by Mycroft

SQL

SELECT  TheDate, TYPE, Value
FROM    (
        SELECT TheDate, Type, Value, Rank( ) OVER (PARTITION BY Type ORDER BY TheDate DESC NULLS LAST) RN
        FROM MyTable
        )
WHERE   RN = 1

Just a bit curious whether performance is better.

Light moves faster than sound. That is why some people appear bright, until you hear them speak.
List of common misconceptions

Try this query

SQL

select distinct
(select top 1 t2.thedate from MyTable as t2 where t2.[type]=t1.[type] order by t2.thedate desc) as thedate
, t1.[type]
,(select top 1 t2.value from MyTable as t2 where t2.[type]=t1.[type] order by t2.thedate desc) as [Value]
from MyTable as t1
order by t1.[type]

I Love T-SQL
"VB.NET is developed with C#.NET"
If my post helps you kindly save my time by voting my post.

modified 26-Oct-11 13:11pm.

You first need to find the MAX(TheDate) and then use that to find the Value(s). Smile | :)

select Value
      ,Type
  from TABLE
 where TheDate in ( select MAX(TheDate)
                      from Table
                     group by Type
                  )
;

That's off the top of my head, but should be close. Smile | :)

Chris Meech
I am Canadian. [heard in a local bar]

In theory there is no difference between theory and practice. In practice there is. [Yogi Berra]

posting about Crystal Reports here is like discussing gay marriage on a catholic church’s website.[Nishant Sivakumar]

OK, but you select the max date and not the max date per type

I have several types and I shearch the last value for each type
and not the max date per type

modified 26-Oct-11 10:39am.

MikeDhaan wrote:
and not the max date per type

The inner select has a group by type which should produce a list of MAX(dates). Smile | :)

Chris Meech
I am Canadian. [heard in a local bar]

In theory there is no difference between theory and practice. In practice there is. [Yogi Berra]

posting about Crystal Reports here is like discussing gay marriage on a catholic church’s website.[Nishant Sivakumar]

Correct but the result with the extract below is not correct.

MAX(TheDate), Type, Value
2011/08/11 , T1 , 10
2011/08/17 , T1 , 12
2011/09/25 , T1 , 11
2011/08/11 , T2 , 15
2011/10/10 , T3 , 15
...

The result is :
MAX(TheDate), Type, Value
2011/08/11 , T1 , 10 Confused | :confused:

2011/09/25 , T1 , 11
2011/08/11 , T2 , 15
2011/08/15 , T2 , 10
...

Because
select MAX(TheDate) from Table group by Type
return
2011/09/25 (for T1)
2011/08/11 (for T2)
2011/10/10 (for T3)

Do a little research on Row_Number, Partition and Ranking. Using these you can set up an inner query that ranks the records by date partitioned over type.

The outer query would then join by date and type where the rank = 1.

Never underestimate the power of human stupidity
RAH

Since there are multiple values the same in TheDate column it can not be used as a key and that is why you are getting those results. Another, more complicated way, is to use the date and type as a key. Try this

select date
      ,type
      ,value
  from table t
      , ( select max(date) max_date
                ,type type
            from Table 
           group by type
        ) tg
 where t.date = tg.max_date
   and t.type = tg.type
order by type
;

Chris Meech
I am Canadian. [heard in a local bar]

In theory there is no difference between theory and practice. In practice there is. [Yogi Berra]

posting about Crystal Reports here is like discussing gay marriage on a catholic church’s website.[Nishant Sivakumar]

Super,

It's now in order ! Wink | ;)

Thanks