Hi All,
I have my table structure as Follows
S.NO INT
S.NAME VARCHAR(50)
now i want to update values where S.NO=10.
How is this possible to writ query.
As per my knowledge sql won't allow dot as in column name in where condition.
Can any one please advice on this.
This is Priority one.
Thanks in advance.
I have three table For example
Employee (Empid , Empname , Esal)
Department (Deptid , Deptname , empid )
Staff (staffid , Staffname , Empid)
It is just example
how can i update Empname whose staffid =1 accor to staffid)
using Join Conditions :- Pls help me out ..
or
how to update data using JOIN Conditions
Yaman
I need to update the status of a client when they make a payment of a certine amount. My problem is this, the two pieces of information needed to do this are comming from two tables. For example;
@ClientID Int,
@PmtAmt Money
IF @PmtAmt >= tblSettings.TopAmt THEN
Update tblClients
SET
ClientStatus='High'
WHERE ClientID=@ClientID
ELSE
Update tblClients
SET
ClientStatus='Medium'
WHERE ClientID=@ClientID
ENDIF
How do I do this in a stored procedure? I need to select the TopAmt from the table tblSettings and then update the table tblClients.
I am trying to do a simple update in one sql table from another where a certain condition in both tables are met.I am missing something basic and have tried numerous posted examples, without success.Here is my code (that does not update) :
opdragaliasnaaminsit.Connection = konneksie
opdragaliasnaaminsit.CommandText = "UPDATE vyfjaarontledings " & _
"SET aliasnaam = T2.aliasnaam" & _
" FROM vyfjaarontledings T1" & _
" INNER " & _
"JOIN blokke T2 " & _
" ON T1.plaasno = T2.plaasno " & _
"WHERE T1.plaasno = T2.plaasno"
opdragaliasnaaminsit.ExecuteNonQuery()
I am trying to update aliasnaam in vyfjaarontledings from blokke.
I have a table (GLTRANS) with thousands of lines.
1 column in the table (ACCNO) has 300 different values which all need to change to a new value.
ie. 11100 all change to 8100
11200 all change to 8200
I know how to do a simple UPDATE
UPDATE GLTRANS
SET ACCNO = '8100'
WHERE ACCNO = '11100'
But how can i combine into 1 script rather than having to continually change this script 300 times??
Thanks
Wilbur
I have Three tables Student,Daily_Attendance_Master and Daily_Attendence_Details.
I want to run sql of insert or update of student attendence(apsent or present) in Daily_Attendence_Details based on Daily_Attendance_Master_Id and Student_Id(from one roll number to another).
If Both are present in table Daily_Attendence_Details then i want to run Updating of attendance from one roll number to another roll number in Daily_Attendence_Details on the basis of Daily_Attendence_Details_Id
And if both or any one is not present i want to run insert of student attendense from one roll number to another roll number in Daily_Attendence_Details.
I give below the structure of three tables Student,Daily_Attendance_Master and Daily_Attendance_Details.
Student:-
CREATE TABLE [dbo].[Student](
[Student_Id] [bigint] IDENTITY(1,1) NOT NULL,
[Course_Id] [smallint] NULL,
[Class_Id] [int] NULL,
[Batch_Year] [varchar](20) NULL,
[Student_Initials] [varchar](20) NULL,
[Code] ....
My question is fairly simple. When I join between two tables, I always use the ON syntax. For example:
SELECT
*
FROM
Users
JOIN UserRoles
ON (Users.UserRoleId = UserRoles.UserRoleId)
No problems there. However, if I then decide to further filter the selection based on some trait of the UserRole, I have two options: I can add the condition as a WHERE statement, or I can add the condition within the ON block.
--Version 1:
SELECT
*
FROM
Users
JOIN UserRoles
ON (Users.UserRoleId = UserRoles.UserRoleId)
WHERE
UserRoles.Active = 'TRUE'
-- Version 2
SELECT
*
FROM
Users
JOIN UserRoles
ON (Users.UserRoleId = UserRoles.UserRoleId
AND UserRoles.Active = 'TRUE')
So, the question is, which is faster/better, if either? The Query Analyzer shows the two queries have the exact same execution plan, which makes sense, since they're both joining the same tables. However, I'm wondering if adding the condition in the ON statement results in fewer rows the JOIN statement initially needs to join up, thus reducing the overall initial size of the results table before the WHERE conditions are applied.
So is there a difference, performance wise? I imagine that if Users had a thousand records, and UserRoles had 10 records, then the JOIN would create a cartesian product of the two tables, resulting in 10,000 records in the table before the WHERE conditions are applied. However, if only three of the UserRoles is set to Active, would that mean that the resulting table, before applying WHERE conditions, would only contain 3000 records?
Thanks for whatever information you can provide.
I have the following variables VehicleID, TransactDate, TransactTime, OdometerReading, TransactCity, TransactState.
VehicleID is the unique vehicle ID, OdometerReading is the Odometer Reading, and the others are information related to the transaction time and location of the fuel card (similar to a credit card).
The records will be first grouped and sorted by VehicleID, TransactDate, TransactTime and OdometerReading. Then all records where the Vehicle ID and TransactDate is same for consecutive rows, AND TransactCity or TransactState are different for consecutive rows should be printed.
I also would like to add two derived variables.
1. Miles will be a derived variable that is the difference between consecutive odometer readings for the same Vehicle ID.
2. TimeDiff will be the second derived variable that will categorize the time difference for a particular vehicle on the same day.
My report should look like:
VehID TrDt TrTime TimeDiff Odometer Miles TrCity TrState
1296 1/30/2008 08:22:42 0:00:00 18301 000 Omaha NE
1296 1/30/2008 15:22:46 7:00:04 18560 259 KEARNEY NE
Can someone please help me here?
Thanks,
Romakanta
Hi SQL fans,I realized that I often encounter the same situation in a relationdatabase context, where I really don't know what to do. Here is anexample, where I have 2 tables as follow:__________________________________________ | PortfolioTitle|| Portfolio |+----------------------------------------++-----------------------------+ | tfolio_id (int)|| folio_id (int) |<<-PK----FK--| tfolio_idfolio (int)|| folio_name (varchar) | | tfolio_idtitle (int)|--FK----PK->>[ Titles]+-----------------------------+ | tfolio_weight(decimal(6,5)) |+-----------------------------------------+Note that I also have a "Titles" tables (hence the tfolio_idtitlelink).My problem is : When I update a portfolio, I must update all theassociated titles in it. That means that titles can be either removedfrom the portfolio (a folio does not support the title anymore), addedto it (a new title is supported by the folio) or simply updated (atitle stays in the portfolio, but has its weight changed)For example, if the portfolio #2 would contain :[ PortfolioTitle ]id | idFolio | idTitre | poids1 2 1 102 2 2 203 2 3 30and I must update the PortfolioTitle based on these values :idFolio | idTitre | poids2 2 202 3 352 4 40then I should1 ) remove the title #1 from the folio by deleting its entry in thePortfolioTitle table2 ) update the title #2 (weight from 30 to 35)3 ) add the title #4 to the folioFor now, the only way I've found to do this is delete all the entriesof the related folio (e.g.: DELETE TitrePortefeuille WHERE idFolio =2), and then insert new values for each entry based on the new givenvalues.Is there a way to better manage this by detecting which value has to beinserted/updated/deleted?And this applies to many situation :(If you need other examples, I can give you.thanks a lot!ibiza
View 8 Replies View RelatedI have two tables A(uname,address,full_name) and B(uname,full_name). I want to update table A for all matching case of uname in table B.
View 5 Replies View Relatedtable2 is intially populated (basically this will serve as historical table for view); temptable and table2 will are similar except that table2 has two extra columns which are insertdt and updatedt
process:
1. get data from an existing view and insert in temptable
2. truncate/delete contents of table1
3. insert data in table1 by comparing temptable vs table2 (values that exists in temptable but not in table2 will be inserted)
4. insert data in table2 which are not yet present (comparing ID in t2 and temptable)
5. UPDATE table2 whose field/column VALUE is not equal with temptable. (meaning UNMATCHED VALUE)
* for #5 if a value from table2 (historical table) has changed compared to temptable (new result of view) this must be updated as well as the updateddt field value.
instead of insert into command
sqlcom.CommandText = "insert into Approve_Overtime(syainNo,ninka_nen_from,ninka_gatsu_from)values(@syainNo,@ninka_nen_from,@ninka_gatsu_from)
how can i change it using update command?
thnx
Hi Guys
I already searched for one day and didn't find any solution. Unfortunately I can't update my dataset. It works when I remove the string "WHERE ID = ?" in the UpdateCommand but then it updates all the records. I think it must be something obvious which I just don't see:(There are two tables; tblArtists and tblCountries which are connected together with a Inner Join. Now, I need the ID from the table Artists to update the dataset. How can I get it?Here the code:....SelectCommand="SELECT tblArtists.ID AS IDArtists, tblArtists.ArtistName, tblArtists.FirstName, tblArtists.LastName, tblArtists.Address, tblArtists.PLZ, tblArtists.City, tblArtists.Region, tblArtists.Country_ID, tblArtists.MusicStyles, tblArtists.HomeDJ, tblArtists.Active, tblArtists.CDate, tblArtists.Description, tblCountries.ID AS IDCountries, tblCountries.Country, tblArtists.Producer, tblArtists.Picture, tblArtists.Homepage, tblArtists.Phonenumber, tblArtists.eMail FROM (tblCountries INNER JOIN tblArtists ON tblCountries.ID = tblArtists.Country_ID) WHERE (tblArtists.Active = ?) AND (tblArtists.HomeDJ = ?) AND (tblArtists.Producer = ?)" UpdateCommand="UPDATE tblArtists SET ArtistName = ?, FirstName = ?, LastName = ?, Address = ?, PLZ = ?, City = ?, Region = ?, Country_ID = ?, MusicStyles = ?, HomeDJ = ?, Active = ?, Description = ?, Producer = ?, Picture = ?, Homepage = ?, Phonenumber = ?, eMail = ? WHERE ID = ?"> <SelectParameters> <asp:ControlParameter ControlID="activeRadioButton" Name="Active" PropertyName="Checked" Type="Boolean"/> <asp:ControlParameter ControlID="homedjRadioButton" Name="HomeDJ" PropertyName="Checked" Type="Boolean"/> <asp:ControlParameter ControlID="producerRadioButton" Name="Producer" PropertyName="Checked" Type="Boolean"/> </SelectParameters> <UpdateParameters> <asp:Parameter Name="ArtistName" Type="String" Size="254" /> <asp:Parameter Name="FirstName" Type="String" Size="254" /> <asp:Parameter Name="LastName" Type="String" Size="254" /> <asp:Parameter Name="Address" Type="String" Size="254" /> <asp:Parameter Name="PLZ" Type="String" Size="254" /> <asp:Parameter Name="City" Type="String" Size="254" /> <asp:Parameter Name="Region" Type="String" Size="254" /> <asp:Parameter Name="Country_ID" /> <asp:Parameter Name="MusicStyles" Type="String" Size="254" /> <asp:Parameter Name="HomeDJ" Type="Boolean" /> <asp:Parameter Name="Active" Type="Boolean" /> <asp:Parameter Name="Description" Type="String" /> <asp:Parameter Name="Producer" Type="Boolean" /> <asp:Parameter Name="Picture" Type="String" Size="254" /> <asp:Parameter Name="Homepage" Type="String" Size="254" /> <asp:Parameter Name="Phonenumber" Type="String" Size="50" /> <asp:Parameter Name="eMail" Type="String" Size="50" /> <asp:Parameter Name="original_IDArtists" Type="Int32" /> </UpdateParameters> </asp:SqlDataSource>
GreetingsPat
IDVALUE1VALUE2
1|a|12
2|v|3
3|c|4
4|g|12
B
IDIDAVALUE
1|1|12
2|1|34
3|2|17
4|3|4
5|1|22
6|3|1
I want to update A with values from b , so the value2 from a= value from b but only with latest corresponding data based on b.id so after updtate a looks like:
IDVALUE1VALUE2
1 |a |22 couse max id from B with ida=1 is 5 and so the value is 22, so A.value2=22
2 |v |17 couse max id from B with ida=2 is 3 and so the value is 17so A.value2=22
3 |c | 1 couse max id from B with ida=3 is 6 and so the value is 1 so A.value2=1
4 |g |12 couse there is no ida=4 in B
I have faced a situation that when i try to update a page. Some values can be updated while some cannot. I try to print the executed SQL query and get the following1 "UPDATE orders SET
2 cust_id=15,po_code='PO20060610',
3 po_amt=10000.0000,
4 add_charges=0,
5 commission='eeeeeee',
6 lab_charges=0,
7 fty_dis=0,
8 pay_trm='adasds',
9 cust_dis=0,
10 trade_trm_desc='',
11 curr_rate=1,
12 ship_expense=0,
13 shipmark='eng ship mard new2',
14 sidemark='Eng Side Mark new333'
15 ,inner_box='Eng Inner Box new333',
16 confirmation='rend confirmation2',
17 contract='end contact23',
18 internal_remark='testing testing 26/6/2007 333',
19 rec_curr_rate=0,rec_amt=0,shipmark_attach='',
20 sidemark_attach='',inner_box_attach='',
21 ord_type=1,status=2,ord_confirm_code='',
22 commission_type=1,sidemark_lang='English',
23 curr_code='HKD',unit_code='PCS',
24 trade_trm='FOB Hong Kong',rec_curr='USD',
25 ord_date='2006/06/10', po_date='01/01/2007',exp_delivery_date='01/01/2007',
26 act_delivery_date='01/01/2007', pay_start_date='10/10/06',pay_end_date='10/10/06',upd_time='2007/03/15 15:41:14' WHERE ord_id=292;Set @ord_id=292;"
The fields sidemark, inner_box, internal_remark cannot update, while others can.
I think it's really strange.... since i have no idea why some can be updated while some others and the SQL seems to me is correct.
Please give me some advices on solving this.
Thank you.
When I update a field f1 I should store its previous value in the field f2. How can I achieve this?
View 1 Replies View RelatedHi ya,
I need to update two columns in one table from information in another table..
Table1
ID, UserID
Table2
ID, NewUserID
How can I write this update statment?
Thanks!
I have a table say #temp1 with coulmn Id and Description
and I do have another table #temp2 with column id and Projectdescription
but in #temp2 there could be more then one value against one id
like the data in #temp2 is look like
id Projectdescription
1 Computer project
1 update in computer project
1 another update in computer
2 Physics project
2 another update
but #temp1 has only one accurance of id
and data initially looks like
id Description
1 NUll
2 NUll
and I would like to update this table description from #temp2 Projectdescription column so that
data in #temp1 table look like after update
id Description
1 Computer project,update in computer project, another update in computer
2 Physics project, another update
I mean I would like to have concatination form of Projectdescription in description column against specific ID
I can achieve this by using UDF but i dont want to use that I just want to do it by update statement not even by using cursor
I have two databases, database A and database B
Both have an identical table called "Codes" containing billing numbers and prices.
Database B is one I use for testing, and is out of date. Is there an easy way to load the values from Table_A.codes into Table_B.codes?
I know how to do an update from one table to another within the same database, but am clueless how to do it when the data reside in separate databases.
Thanks in advance.
hi, i have column salary in my table emp.
my column values are as follows:
salary:
20000
30000
40000
50000
so i need to update this column values in a single update statement.
so my values as follows:
salary:
10000
10000
10000
10000
so please give me example query to update this please
Hi there...Is it possible to write an UPDATE or INSERT query, where the new value comesfrom an array? For example:UPDATE table_a SET column_x = [@array1]WHERE column_y = [@array2];It's a query (for argument's sake called query1) in an Access database,which I'm accessing as a stored procedure through PHP, so I would run somephp code that looked possibly like this:$array1 = array("a","b","c","d");$array2 = array(1,2,3,4);$str_sql = "exec query1 $array1, $array2";my_run_query_function($str_sql);But is it possible? The information I can find about it seems to say that ithas to be an array created inside the query, but if it's a stored procedure,this isn't possible, is it?Hope someone can help...Plankmeister.
View 2 Replies View RelatedHi, I am trying to use a formView with an update button to update individual records in an sql database. (when i click update it doesnt perform the update and just refreshes the page. ) One of the fields in my records is a NULL - this is also one of the fields that i need to update. When i manually go into the database and enter some data, and then go back to my form, it updates fine, but as soon as i delete the data from the field, it returns to NULL and im back to square one. Any Ideas on how to get around this problem?THanks
View 4 Replies View RelatedI am new to both ASP.net and this forum. I have seen some posts close to this, but none address this problem.
I have a SQL Server database on JOHN1 called 'siu_log' with a table called 'siu_log'. It has two fields: Scenarios char[20] and Machines char[20].
I have been adapting code from Build Your Own ASP.NET Website in C# & VB.NET by Zac Ruvalcaba to learn the language. Much of what you will see is his work adapted for my use.
First, the html:
<%@ Page Language="vb" AutoEventWireup="false" Codebehind="WebForm1.aspx.vb" Inherits="SIU_Assign.WebForm1"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<title>SIU Interface Scenario Assignments</title>
<meta content="Microsoft Visual Studio .NET 7.1" name="GENERATOR">
<meta content="Visual Basic .NET 7.1" name="CODE_LANGUAGE">
<meta content="JavaScript" name="vs_defaultClientScript">
<meta content="http://schemas.microsoft.com/intellisense/ie5" name="vs_targetSchema">
</HEAD>
<body>
<form id="Form1" method="post" runat="server">
<asp:datagrid id="scenariosDataGrid" runat="server" CellPadding="4" AutoGenerateColumns="False"
OnUpdateCommand="dg_Update" OnCancelCommand="dg_Cancel" OnEditCommand="dg_Edit" DataKeyField="Scenarios">
<ItemStyle BackColor="#00DDDD" ForeColor="#000000" />
<HeaderStyle BackColor="#003366" ForeColor="#FFFFFF" />
<Columns>
<asp:EditCommandColumn EditText="Edit" CancelText="Cancel" UpdateText="Update" />
<asp:BoundColumn DataField="Scenarios" HeaderText="Scenario" ReadOnly="True" />
<asp:TemplateColumn>
<HeaderTemplate>
Machine
</HeaderTemplate>
<ItemTemplate>
<%# Container.DataItem("Machines") %>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="txtMachine" Runat=server Text='<%# Container.DataItem("Machines") %>' />
</EditItemTemplate>
</asp:TemplateColumn>
</Columns>
</asp:datagrid>
<asp:Label id="resultLabel" runat="server"></asp:Label></form>
</body>
</HTML>
Then the CodeBehind:
Sub dg_Update(ByVal s As Object, ByVal e As DataGridCommandEventArgs)
Dim strMachineName, strScenarioName As String
Dim intResult As Integer
strScenarioName = Trim(scenariosDataGrid.DataKeys(e.Item.ItemIndex))
strMachineName = CType(e.Item.FindControl("txtMachine"), TextBox).Text
cmd = New SqlCommand("UPDATE siu_log SET Machines=@Machine " & _
"WHERE Scenarios=@Scenario", conn)
cmd.Parameters.Add("@Machine", strMachineName)
cmd.Parameters.Add("@Scenario", strScenarioName)
conn.Open()
intResult = cmd.ExecuteNonQuery()
resultLabel.Text = "The result was " & intResult & "."
conn.Close()
scenariosDataGrid.EditItemIndex = -1
BindData()
End Sub
The problem is the strMachineName variable always contains the previous contents of the text box -- not the new one. This makes the UPDATE query just push the old data back into the table.
Any suggestions?
Thanks!
John
I have two tables A and b
A
projectID Setid value
301 1 abc
301 2 xyz
302 4 def
..... .... ..
B
SettingsId Setvalue
1 ter
2 yet
4 44
... ....
I want to update all the Setid of table A with that of values from table b. How can i do this?
Hi I have a table(tblA) as follows
Col1--------------col2---------col3-----col4
London------------1131---------299------Barking
Didicot-----------3451---------429------Dansdon
Barking/ASton-----1131---------345------Singleton
Vander/ADon/cam---3907---------299------derby
Null or Blank ---1131---------423------Addington
Expecting the Data should display look like below
London------------1131---------299------Barking
Didicot-----------3451---------429------Dansdon
Barking/ASton-----1131---------345------Singleton
Vander/ADon/cam---3907---------299------derby
But when user change the col2 value (1131) to 113999, this should be changed to all values where col2 is 1131. Please Help
I have a grid like this and when I change Designation value of Name X from PA to PAT, this change should reflect to Sathish Designation too. Changing similar values should reflect all over the grid. Like update database on change of value of similar kind.
By far I use this query to update the grid. So a where clause should be used now to update the grid to fit this scenario.
("UPDATE AppInvent_Test SET Name = @Name, Designation = @Designation, City = @City WHERE EmpID = @EmpID");
EmpID Name Designation City
21 X PA Chn
2 Sathish PA Chn
3 Shiva A Cbe
17 Venkat M Hyd
22 Y SM Cbe
18 Vignesh SA Hyd
Table:
CREATE TABLE [dbo].[AppInvent_Test](
[EmpID] [int] IDENTITY(1,1) NOT NULL,
[Name] [varchar](100) NULL,
[Designation] [varchar](100) NULL,
[Code] ....
I have a grid with checkbox, where users can select multiple rows and edit at the same time and save it to the DB. Now I have used a Footer Template with textbox in the gridview. So if I want to put similar data's for some particular rows at the same time in the grid, I select the multiple rows and try to put values in the footer template textbox and when I click on save, it saves successfully.
UPDATE QUERY:
"UPDATE [Test] SET [Name]='" + Name + "',[Designation]= '" + Designation + "', [City]= '" + City + "' WHERE EmpID='" + EmpID + "'";
Now here is the challenge, but even when I enter null values in the footer template textbox it has to save with the old values of the rows and not null values. I tried it and couldn't make it happen. So anything like putting the case for each column and mentioning like if null accept the old value and not null accept new value.
i want to display the max Date in place of NULL when Indicator is "1"
INPUT
Emp Num
Date
Indicator
1
Null
1
[code]....
Hello everybody,
I can't perform an operation apparently very easy: set a field to a NULL value.
This is the db:
Microsoft SQL Server 2000 - 8.00.760 (Intel X86)
Dec 17 2002 14:22:05
Copyright (c) 1988-2003 Microsoft Corporation
Standard Edition on Windows NT 4.0 (Build 1381: Service Pack 6)
This is the table:
CREATE TABLE [ProgettoTracce] (
[ID_Progetto] [int] NOT NULL ,
[MisDifDef] [real] NULL ,
[MisDifMeas] [real] NULL ,
[MisDifAna] [real] NULL ,
[MisDifID] [real] NULL ,
[MisDifCV] [real] NULL
) ON [PRIMARY]
GO
This is qry:
UPDATE ProgettoTracce
SET MisDifDef = NULL
WHERE ID_Progetto = 3444
The qry has been performed with no error. Then I execute SELECT * FROM ProgettoTracce WHERE ID_Progetto = 3444 and I find the value I tried to overwrite with NULL. If I update with 0 (for example) it works.
Obviously this happens on the production db, because on the development db the update with NULL works fine.
No transaction is called, db options are the same on dbs...
What's happen? Have I to call an exorcist???
Thanks in advance for any help!
Nicola
HI ALL,
CAN ANYBODY HELP ME TO SOLVE THE ISSUE
I WANNA UPDATE A RECORD OF ONE TABLE WITH VALUES THAT ARE PRESENT IN A COLUMN OF ANOTHER TABLE
OR
CAN I DO THE SAME USING INSERT QUERY
THANKS IN ADVANCE
I'm trying to update a value into a table a sum. The two tables have ID values. These ID values appear once in Table1 and multiple times in Table2. I'm currently trying to sum up the values in Table2 where the IDs are equal to Table1 and then update the value:
UPDATE [Table1] SET
[Total] =
(SELECT SUM([Table2].[QTY]) FROM [Table2],
[Table1] WHERE [Table1].[ID] = [Table2].[ID]
GROUP BY [Table1].[ID])
FROM [Table1], [Table2] WHERE [Table1].[ID] = [Table2].[ID]
I have two tables and I need to update values in them via a stored procedure. Tried too much to update but some times it update the first table only, others the second or even fail due to cannot allow duplicates. Also when it updates the WHOLE data in the table becomes the same as the new updated ones. I've now reached to this error after all these lines of codes
Cannot insert the value NULL into column 'Emp_ID',table 'DatePics'; column does not allow nulls. UPDATE fails.The statement has been terminated
Here is the SQL code :
ALTER procedure [dbo].[UpdateEmp]
@EmpName nvarchar(100),
@Nationality nvarchar(30),
@Passport nvarchar(20),
@ContractDate date,
@HealthDate date
[Code] ......
Help, please. I am trying to update atable with this structre:CREATE TABLE Queue (PropID int, EffDate smalldatetime,TxnAmt int)INSERT Queue (PropID) SELECT 1INSERT Queue (PropID) SELECT 2INSERT Queue (PropID) SELECT 3....from this table...CREATE TABLE Txns (PropID int, TxnDate smalldatetime,TxnType char(1), TxnAmt int)INSERT Txns SELECT 1 '20000201', 'B', 100000INSERT Txns SELECT 1 '20020515', 'B', 110000INSERT Txns SELECT 1 '20020515', 'A', 120000INSERT Txns SELECT 1 '20020615', 'c', 130000....only certain txn types are okay, and they have an orderof preference...CREATE TABLE GoodTxnTypes (GoodTxnType char(1), Pref)INSERT GoodTxnTypes SELECT 'A', 1INSERT GoodTxnTypes SELECT 'B', 2The idea is to fill in the NULL fields in the Queue table,according to a rule -- the transaction must be the latesttransaction within a date window, it must be one of the goodtxn types, and if there are two txns on that date, choosethe txn by the preferred txn type (A is preferred over B,according to the field Pref).If the time window were 20020101 to 20030101, the txnselected to update the Queue table would be this one:INSERT Txns SELECT 1 '20020515', 'A', 120000 -- there aretwo in the time window that are type A or B; they areboth on the same day, so the 'A' is preferred.If the time window were 20000101 to 20010101, this wouldbe selected because it is the only A or B type txn inthe interval:INSERT Txns SELECT 1 '20000201', 'B', 100000I'm looking for a statement that starts...UPDATE Queue SET EffDate = ...., TxnAmt = .... (EffDate,in this table, is the same as TxnDate in the Txn table).Assume we have @FirstDate and @LastDate available.Help, please. I'm getting stuck with (a) a sub-query tofind the relevant Txn records, and (b) another sub-querywithin that to find the MAX(TxnDate) within the timewindow. Filtering the Txn records on the basis of theGoodTxnTypes table is easy, as is ordering what is returned.But I'm having trouble joining the sub-queries back to theQueue table on the basis of PropId.
View 1 Replies View Related