I was told that, when possible, use integer fields for the equality comparison in INNER JOINS. Today someone suggested that using character fields that are indexed should be just as efficient. What do you think?
TIA,
barkingdog
Hello guys,
I have an indexed view with schema binding and text catalog. So far, so good.
Now I have the need to know if the rows in this view have matching records in another table. Ouch.
The relation is 1 to n, where n can be 0 or more. For example:
Table1:
Product1, Description1
Product2, Description2
Product3, Description3
Table2
Product1, ProviderA
Product1, ProviderB
Product2, ProviderZ
The view ouput I need is:
Product1, Description1, HasProvider
Product2, Description2, HasProvider
Product3, Description3, NULL (or not, or whatever)
Any idea on how to do it? I tried different several ways, but I always end up with a dead end.
Thanks!
I have created a table from another table where I specified that one of the fields, an number field, is sorted in ascending order and have NOT specified that it is to be an indexed field and there are 10 million records, from 1 to 10,000,000 exactly.
Now, if I query that table, asking to return records 1-1,000 from that non indexed number field that I sorted in ascending order (where number field <= 1,000) , will it run as fast as if it were indexed?
In other words, does SQL know somehow that these records are sorted in ascending order and so will not do a full table scan, stopping at 1,000 to return my data set?
Or is there no way for SQL to know this and only specifying an indexed field allows SQL to know that its in some order and so it doesn't have to do the full scan?
I have a whole bunch of bit fields in an SQL data base, which makes it a little messy to report on.
I thought a nice idea would be to assigne a text string/null value to each bit field and concatenate all of them into a result.
This is the basic logic goes soemthing like this:
select case new_accountant = 1 then 'acct/' end +
case new_advisor = 1 then 'adv/' end +
case new_attorney = 1 then 'atty/' end as String
from new_database
The output would be
Null, acct/, adv/, atty, acct/adv/, acct/atty/... acct/adv/atty/
So far, nothing I have tried has worked.
Any ideas?
We find that a delete command on a table where the rows to be deleted involve an inner join between the table and a view formed with an outer join sometimes works, sometimes gives error 625.
If the delete is recoded to use the join key word instead of the = sign
then it alway gives error 4425.
625 21 0 Could not retrieve row from logical page %S_PGID by RID because the entry in the offset table (%d) for that RID (%d) is less than or equal to 0. 1033
4425 16 0 Cannot specify outer join operators in a query containing joined tables. View '%.*ls' contains outer join operators.
The delete with a correleted sub query instead of a join works.
Error 4425 text would imply that joins with view formed by outer joins should be avoided.
Any ideas on the principles involved here.
I'm writing a stored procedure where one of the arguments (WHERE area) really only needs to be used in some circumstances. I.e., when the procedure is passed a USER_ID it needs to check that against the database, but in some instances I'll send 0 instead of a real USER_ID, and in those cases it should return all records regardless of the ID.
Here's what I've got:
...
and b.user_ID = CASE @user_ID WHEN 0 THEN '%'
ELSE @user_ID
...
...the problem being the '%' part. That won't work on an integer column.
Does anyone have any ideas here?
Thanks,
Al
The code below has this line
SET @SOGallons = @ODTGallons
I need it to add the Current value of @SOGallons to the newly selected value of @ODTGallons and set that as the new value of @SOGallons.
I've tried
SET @SOGallons = @SOGallons + @ODTGallons
SET @SOGalTemp = @SOGallons
SET @SOGallons= @SOGalTemp + @ODTGallons
Neither Worked
<CODE>
FROM [CSITSS].[dbo].[Orderdt] as ODT LEFT OUTER JOIN [CSITSS].[dbo].[Orddtcom] as OCOM
ON ODT.[Companydiv] = OCOM.[Companydiv] AND ODT.[OrderNumber] = OCOM.[OrderNumber] AND
ODT.[Sequence] = OCOM.[Sequence] WHERE ODT.[Companydiv]= 'GLPC-TRANS' AND ODT.[OrderNumber] = @OrdNum AND
([LineType] = 'IP' OR [LineType] = 'SO' OR [LineType] = 'DL' OR [LineType] = 'PU')
OPEN TC1
FETCH NEXT FROM TC1 INTO @LT, @ODTGallons, @ODTComm
WHILE @@FETCH_STATUS=0
BEGIN
IF @LT = 'SO'
BEGIN
SET @SplitTest = 1
SET @SOGallons = @ODTGallons
IF @SOGallons > 0
BEGIN
SET @SOGalTest = 1
END
ELSE
BEGIN
SET @SOGalTest = 0
END
IF @SplitTest <> @SOGalTest
BEGIN
SET @SOGalTest = 0
END
END
ELSE
BEGIN
SET @SOGalTest = 1
END
FETCH NEXT FROM TC1 INTO @LT, @ODTGallons, @ODTComm
END
CLOSE TC1
DEALLOCATE TC1</CODE>
I have a table which measures the changes in a feedback rating, measured by an integer. Most of my records are the same. Only the primary key & the timestamp change.
How do I query just the changes?
Example dataset:
idrating
15
25
35
45
56
66
[code]....
There are 20 rows & 5 changes. The query I want will result in just those that are different from the ones before them:
idrating
45
56
97
118
189
I use Microsoft SQL 2008
1
2
3
* (unscheduled visit) (should be 3.01)
* (unscheduled visit) (should be 3.02)
Basically when there is an unscheduled visit, it should take the previous visit number and add .01
I am not sure how to count using non integers
Thanks
Here is what I am trying to do...
I want to goup "members" togethers in a "group."
A table for members and a table for groups.
each containing coluns...
but inside Groups I would like a column that contains ID numbers for the members that be long to that group.
Being that members can belong to multiple groups - I can not use a GroupID in Members - if so I also need a way of it modular.
Obvisiously I am not a very good DB programmer - but I want the least amount of empty/unused space in my tables.
Hope this makes sense
I'm wondering if there is a function in SQL that works like SUBSTRING function but for integers. Like for example if I have a number like 20010112 and I want to cut it to the first for digits so that it reads 2001?
View 5 Replies View RelatedI am having difficulty trying to figure out how to compare two integers stored in a table to return a third. I have two integer fields in one table and two in another like this:
Table1.SomeNumber1 = 1
Table1.SomeNumber2 = 2
Table2.SomeNumber1 = 2
Table2.SomeNumber2 = 1
I need to be able to compare the first number from the first table to the first number in the second table. If the values are different I need to set a variable or field to 0. If the numbers are the same I need to set my variable or field to 1.
I need to follow the same procedure comparing the second number in the first table to the second number in the second table. In addition, I need to be able to do it in a single select statement.
Does anyone have any ideas on how this could be done? Thank you for any help you may be able to provide.
Gmz
It seems I am facing again an unsurmountable problem It should be so simple but one has to spend hours researching how to handle it. The MSDN help on this subject is increadibly obscure.
I have input parameters @months int, @days int, @years int in a stored procedure.
All I want to do is to get a DateTime variable out of them.
DECLARE @dated DateTime.
Thus I want @dated to be set to a DateTime value with month = @months, day = @days and year = @years. The MSDN help says that no CAST should be used since the conversion from int to DateTime should be implicit!!
No examples are given. They seem to show how to CAST or CONVERT varchar to DateTime. Shall I first convert my int to varchar?
It is rudiculous. I've tried dozens of variants. Please help.
Thanks.
I am trying use the decimal data type for a field in SQL Server. When I input the values below, they round off.
73.827 Rounds to 74
1925.1 Rounds to 1925
119.79 Rounds to 120
What am I missing? Access never gave me this issue. Do you see any reason this would happen? I am entering the values into the table directly!
I'm embarassed I haven't figured this out already but here goes.
Lets say you need a percentage from dividing two integers for example
"select 2000/4000"
This will produce a zero and I'm assuming that is because of the datatypes involved (the values are coming from columns where the datatype is int)
I've tried converting the values to decimal types but I keep getting overflow erros unless I use very small values.
As always, thanks VERY MUCH for the kind advice.
I have a table with below data. Requirement is to replace all integers with continuous 6 or more occurrences with 'x'. Less than 6 occurrences should not be replaced.
create table t1(name varchar (100))
GO
INsert into t1
select '1234ABC123456XYZ1234567890ADS'
GO
INsert into t1
select 'cbv736456XYZ543534534545XLS'
GO
EXPECTED RESULT:
1234ABCxxxxxxXYZxxxxxxxxxxADS
cbvxxxxxxXYZxxxxxxxxxxxxXLS
drop table t1
-----Table Proc Index Performance TSQL &&%$#@*(#@$%.......------------
Deep Into SQL Jungle
I'm having trouble adding a 4-byte integer with an 8-byte integer. Here's what I'm doing:
Column Name: BIG_ID
Derived Column: < add as new column >
Expression: (DT_I8)[ID] + 840230000538058
Data Type: eight-byte signed integer {DT_I8]
The error I get:
The literal 840230000538058 is too large to fit into type DT_I4. The magnitude of the literal overflows the type.
Then I try the expression:
(DT_I8)[ID] + (DT_I8)840230000538058
and
[ID] + 840230000538058
and get the same error.
What am I doing wrong? Is it possible to add 2 8-byte integers in regular expression? Why does it still think the literal is DT_I4?
Thanks,
Michael
Hello, all.
Why is it that, despite what is said in the sketchy SQL Help content, it appears to be impossible to cast a string to an integer in the Expression Builder to generate a value for a variable? More specifically, why does the following expression cause an error?
(DT_UI4) (SUBSTRING(@[User::FullDataPath], LEN(@[User:ataPath]) + 1, 2))
I'm iterating over files and using the name of a given file as an ID for an operation. I simply want to grab a file name using the Foreach Loop Container and process that file, while at the same time use the name in another operation. The file name will be something like "2.txt" (full path something like "c:somethingsomething2.txt"). I can use string functions to return the file name, which is a number as a string, and it should be no problem to cast that number as a string to a number (an Int32). SQL Server 2005 help has a chart that indicates such a cast is legal.
Maybe it's a crazy thing to be doing. Maybe I have to go about this a completely different way, but casting from "2" to 2 should be possible in the Expression Builder.
Thanks for any help.
I am working with a database named €œDocuments€? that contains 4 categories of text documents, each having its own number designation in an integer datatype column named SectionTypeId:
1 = Text
2 = Report
3 = Background
4 = Index
I would like to create a new column named €œDocType€? in which the integer data type for each document is replaced with a varchar data type letter (1 = T, 2 = R, 3 = B, 4 = I). I was able to easily create the new column and cast the data type from integer to varchar:
--CREATE NEW COLUMN €œDocType€? WITH VARCHAR DATATYPE
ALTER TABLE FullDocuments ADD DocType VARCHAR(1) NULL
Go
--UPDATE NEW COLUMN WITH CAST STRING
UPDATE FullDocuments SET DocType = CAST(SectionTypeID AS VARCHAR(1))
Go
But I have problems with the REPLACE method for replacing the numbers with letters. First I tried this based on the examples in MSDN Library:
--REPLACE NUMBERS WITH LETTERS
UPDATE Fulldocuments REPLACE (DocType,"1","T")
Which produced an error message: €œIncorrect syntax near 'REPLACE'.€?
Thinking that the datatype may be the problem, I tried this to convert to DT_WSTR data type prior to replace:
UPDATE Fulldocuments REPLACE ((DT_WSTR,1)DocType,"1","T")
Which produced the same error message: €œIncorrect syntax near 'REPLACE'.€?
I have never done a REPLACE before, so any suggestions for accomplishing this would be appreciated.
I have a table where each entry represents a range:
id, num_ini, num_fim
1, 1, 19
2, 20, 39
3, 40, 59
etc
Is there any way to select a recordset on this table with the following format?
id, num
1, 1
1, 2
1, 3
etc
2, 20
2, 21
2, 22
etc
I'm using MSSQL 2005
tks
My ERP software stores all dates as integers. So originally, I wrote a T-SQL function to convert these integer dates to normal people dates in the query I use as the recordset for my report. Well...that worked fine on 1,000 rows, but NOT for 100,000. So I've figured out that if I convert my normal person date parameter to an integer date, then SQL only has to convert my 1 parameter instead of having to convert 100,000 fields, (actually, 300,000 because I have 3 date columns).
So my question is, what is the best way to do this? This is what I have so far:
SET @Macola = Cast(Datepart(yy,@MacolaDate) as varchar) + Cast(Datepart(mm,@MacolaDate) as varchar) + Cast(Datepart(dd,@MacolaDate) as varchar)
However, I want the leading zeros for the month and day. For example if I enter '1/1/2004' into this function, it returns 200411, but I need it to return 20040101.
Any suggestions would be greatly apprectiated. Thank you.
SQL Server 2000Howdy All.Is it going to be faster to join several tables together and thenselect what I need from the set or is it more efficient to select onlythose columns I need in each of the tables and then join them together?The joins are all Integer primary keys and the tables are all about thesame.I need the fastest most efficient method to extract the data as thisquery is one of the most used in the system.Thanks,Craig
View 3 Replies View RelatedHi all,
I have a wrong €œdbo.Samples€? table:
SampleID SampleName Matrix SampleType ChemGroup ProjectID
1 Blueriver01 Soil QA VOCs 1
7 Greentree01 Water Primary VOCs 1
8 Greentree02 Water Duplicate VOCs 1
9 Greentree03 Water QA VOCs 2
10 Greentree11 Soil Primary VOCs 1
11 Greentree11 Soil Duplicate VOCs 1
12 Greentree11 Soil QA VOCs 3
13 Redrock01 Water Primary VOCs 1
14 Redrock02 Water Duplicate VOCs 1
15 Redrock03 Water QA VOCs 2
16 Redrock11 Soil Primary VOCs 1
17 Redrock12 Soil Duplicate VOCs 1
18 Redrock13 Soil QA VOCs 3
I used the following sql code to correct the wrong ProjectIds:
USE ChemDatabase
GO
ALTER TABLE Samples
SET ProjectID = 4 WHERE SampleID = 7
SET ProjectID = 4 WHERE SampleID = 8
SET ProjectID = 5 WHERE SampleID = 9
SET ProjectID = 4 WHERE SampleID = 10
SET ProjectID = 4 WHERE SampleID = 11
SET ProjectID = 6 WHERE SampleID = 12
SET ProjectID = 7 WHERE SampleID = 13
SET ProjectID = 7 WHERE SampleID = 14
SET ProjectID = 8 WHERE SampleID = 15
SET ProjectID = 7 WHERE SampleID = 16
SET ProjectID = 7 WHERE SampleID = 17
SET ProjectID = 9 WHERE SampleID = 18
GO
I got the following error message:
Msg 156, Level 15, State 1, Line 2
Incorrect syntax near the keyword 'SET'.
Please help and tell me what it is the right syntax for my €˜SET€™
used in this sql code. I think there are more mistakes in this set of sql code. Please enlighten me and advise me how to make this set of code right.
Thanks,
Scott Chang
Hi,
Why is it that SQL joins (*=) run a little faster as opposed to ANSI joins(LEFT JOIN...)? Aren't they supposed to be almost identical?
The issue is this: we are promoting using ANSI syntax for the obvious reason (future versions of SQL Server may not support SQL Server syntax; portability, etc.)
However, the problem is the speed. What have others done about this? Do you use ANSI syntax or SQL syntax? HOw true is it that future SQL Server versions may discontinue support for the '*=" and "=*' join operators.
Angel
I have four tables which I want to return results for an advanced search function, the tables contain different data, but can be quite easily joined,
Table A Contains a Main Image, this image is displayed in the results
Table B Contains an Icon, this image is displayed in the results
Table C doesn't have an image in it but has a child table with a number of images associated to the table, in the UNION ALL statement I would Like to do a Join to get say the top Image from this child and print it for the row associated with table C.
Select title, description, image from tableA
UNION ALL
Select title, description, icon as image from tableB
UNION ALL
title, description, ( inner Join SELECT top(1)
from imageTableC where imagetableC.FK = tableC.PK)
as image from tableC
Could someone show me the syntax to do this, I have all the information printing to the screen, bar this table C image.
Hi All,
Im having a problem with a statement i cannot seem to get 2 left joins working at the same time 1 works fine but when i try the second join i get this error:-
Microsoft OLE DB Provider for ODBC Drivers error '80040e14'
[Microsoft][ODBC Microsoft Access Driver] Syntax error (missing operator) in query expression 'children_tutorial.school_id=schools.idx LEFT JOIN regions ON children_tutorial.region_id=region.idx'.
My SQL statment is as follows :-
SELECT children_tutorial.*,schools.schoolname,regions.rname FROM children_tutorial LEFT JOIN schools ON children_tutorial.school_id=schools.idx LEFT JOIN regions ON children_tutorial.region_id=region.idx
I am using an Access database i have tried all sorts to get it working and its driving me mad!! any help would be really appreciated.
I am working with a legacy SQL server database from SQL Server 2000. I noticed that in some places that they use decimal data types, that I would normally think they should be using integer data types. Why is this does anyone know?
Example: AutomobileTypeId (PK, decimal(10,0), not null)
Hi,
I have soma ado.net code that inserts 7 parameters in a database ( a date, 6 integers).
I also use a self incrementing ID but the date is set as primary key because for each series of 6 numbers of a certain date there may only be 1 entry. Moreover only 1 entry of 6 integers is possible for 2 days of the week, (tue and fr).
I manage to insert a row of data in the database, where the date is set as smalldatetime and displays as follows: 1/05/2007 0:00:00 in the table.
I want to retrieve the series of numbers for a certain date that has been entered (without taking in account the hours and seconds).
A where clause seems to be needed but I don’t know the syntax or don’t find the right function
I use the following code to insert the row :
command.Parameters.Add(new SqlParameter("@Date", SqlDbType.DateTime, 40, "LDate"));
command.Parameters[6].Value = DateTime.Today.ToString();
command.ExecuteNonQuery();
and the following code to get the row back (to put in arraylist):
“SELECT C1, C2, C3, C4, C5, C6 FROM Series WHERE (LDate = Today())�
WHERE LDate = '" + DateTime.Today.ToString() + "'"
Which is the correct syntax? Is there a better way to insert and select based on the date?
I don’t get any error messages and the code executes fine but I only get an empty datatable in my dataset (the table isn’t looped for rows I noticed while debugging).
Today’s date is in the database but isn’t found by my tsql code I think.
Any help would be greatly appreciated!
Grtz
Pascal
what do u think about a table that has 19 indexes and some of them are covering index?
View 3 Replies View Relatedhi all,
In the properties of the table in the MS Access there is an Indexed column. If someone would had set that to "Yes (Duplicates Ok)" how can one implement this to MSSQL???
I am creating a table on SQL Server. One of the columns in this new table contains whole integer as wells as decimal values (i.e. 4500 0.9876). I currently have this column defined as Decimal(12,4). This adds 4 digits after the decimal point to the whole integers. Is there a data type that will have the decimal point only for decimal values and no decimal point for the whole integers?
View 2 Replies View RelatedI have a table with three fields that are marked as indexed fields with unique keys. I want
to remove one of the fields. When I do this and hit the rebuild button -- I get an error, that
there is a duplicate field, so it will not just let me remove the one field and leave the other
two?? How can I get around this?
Hi All,
I have over 100 views in a database. How can I check which view we used indexed view?
Thanks.